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Recommended settings for Wi-Fi routers and access points

For the best security, performance, and reliability, we recommend these settings for Wi-Fi routers, base stations, or access points used with Apple products.

This article is primarily for network administrators and others who manage their own network. If you’re trying to join a Wi-Fi network, one of these articles should help:

About privacy and security warnings
If your Apple device shows a privacy warning or weak-security warning about a Wi-Fi network, that network could expose information about your device. Apple recommends connecting to Wi-Fi networks that meet or exceed the security standards in this article.

Before changing the settings on your router

1. Back up your router’s settings, in case you need to restore them.
2. Update the software on your devices. This is critical to ensure that your devices have the latest security updates and work best with each other.
   • First install the latest firmware updates for your router.
   • Then update the software on your other devices, such as on your Mac and on your iPhone or iPad.
3. On each device that previously joined the network, you might need to forget the network to ensure that the device uses the router’s new settings when rejoining the network.

Router settings

To ensure that your devices can connect securely and reliably to your network, apply these settings consistently to each Wi-Fi router and access point, and to each band of a dual-band, tri-band, or other multiband router.

Security

Set to WPA3 Personal for better security
Set to WPA2/WPA3 Transitional for compatibility with older devices

The security setting defines the type of authentication and encryption used by your router, and the level of privacy protection for data transmitted over its network. Whichever setting you choose, always set a strong password for joining the network.

• WPA3 Personal is the newest, most secure protocol currently available for Wi-Fi devices. It works with all devices that support Wi-Fi 6 (802.11ax), and some older devices.
• WPA2/WPA3 Transitional is a mixed mode that uses WPA3 Personal with devices that support that protocol, while allowing older devices to use WPA2 Personal (AES) instead.
• WPA2 Personal (AES) is appropriate when you can’t use one of the more secure modes. In that case, also choose AES as the encryption or cipher type, if available.

Weak security settings to avoid on your router

Don’t create or join networks that use older, deprecated security protocols. These are no longer secure, they reduce network reliability and performance, and they cause your device to show a security warning:

• WPA/WPA2 mixed modes
• WPA Personal
• WEP, including WEP Open, WEP Shared, WEP Transitional Security Network, or Dynamic WEP (WEP with 802.1X)
• TKIP, including any security setting with TKIP in the name

Settings that turn off security, such as None, Open, or Unsecured, are also strongly discouraged. Turning off security disables authentication and encryption and allows anyone to join your network, access its shared resources (including printers, computers, and smart devices), use your internet connection, and monitor the websites you visit and other data transmitted over your network or internet connection. This is a risk even if security is turned off temporarily or for a guest network.

Network name (SSID)

Set to a single, unique name (case-sensitive)

The Wi-Fi network name, or SSID (service set identifier), is the name your network uses to advertise its presence to other devices. It’s also the name that nearby users see on their device’s list of available networks.

Use a name that’s unique to your network, and make sure that all routers on your network use the same name for every band they support. For example, don’t use common names or default names such as linksys, netgear, dlink, wireless, or 2wire, and don’t give your 2.4GHz and 5GHz bands different names.

If you don’t follow this guidance, devices might not connect reliably to your network, to all routers on your network, or to all available bands of your routers. And devices that join your network are more likely to encounter other networks that have the same name, and then automatically try to connect to them.

Hidden network

Set to Disabled

A router can be configured to hide its network name (SSID). Your router might incorrectly use ”closed” to mean hidden, and ”broadcast” to mean not hidden.

Hiding the network name doesn’t conceal the network from detection or secure it against unauthorized access. And because of the way that devices search for and connect to Wi-Fi networks, using a hidden network might expose information that can be used to identify you and the hidden networks you use, such as your home network. When connected to a hidden network, your device might show a privacy warning because of this privacy risk.

To secure access to your network, use the appropriate security setting instead.

MAC address filtering, authentication, access control

Set to Disabled

When this feature is enabled, your router can be set up to allow only devices that have specified MAC (media access control) addresses to join the network. You shouldn’t rely on this feature to prevent unauthorized access to your network, for these reasons:

• It doesn’t prevent network observers from monitoring or intercepting traffic on the network.
• MAC addresses can easily be copied, spoofed (impersonated), or changed.
• To help protect user privacy, some Apple devices use a different MAC address for each Wi-Fi network.

To secure access to your network, use the appropriate security setting instead.

Automatic firmware updates

Set to Enabled

If possible, set your router to automatically install software and firmware updates as they become available. Firmware updates can affect the security settings available to you, and they deliver other important improvements to the stability, performance, and security of your router.

Radio mode

Set to All (preferred), or Wi-Fi 2 through Wi-Fi 6 (802.11a/g/n/ac/ax)

These settings, available separately for the 2.4GHz and 5GHz bands, control which versions of the Wi-Fi standard the router uses for wireless communication. Newer versions offer better performance and support more devices concurrently.

It’s usually best to enable every mode offered by your router, rather then a subset of those modes. All devices, including older devices, can then connect using the fastest radio mode they support. This also helps reduce interference from nearby legacy networks and devices.

Bands

Enable all bands supported by your router

A Wi-Fi band is like a street over which data can flow. More bands provide more data capacity and performance for your network.

Channel

Set to Auto

Each band of your router is divided into multiple, independent communication channels, like lanes in a street. When channel selection is set to automatic, your router selects the best Wi-Fi channel for you.

If your router doesn’t support automatic channel selection, choose whichever channel performs best in your network environment. That varies depending on the Wi-Fi interference in your network environment, which can include interference from any other routers and devices that are using the same channel. If you have multiple routers, configure each to use a different channel, especially if they are close to each other.

Channel width

Set to 20MHz for the 2.4GHz band
Set to Auto or all widths (20MHz, 40MHz, 80MHz) for the 5GHz band

Channel width specifies how large of a ”pipe” is available to transfer data. Wider channels are faster but more susceptible to interference and more likely to interfere with other devices.

• 20MHz for the 2.4GHz band helps to avoid performance and reliability issues, especially near other Wi-Fi networks and 2.4GHz devices, including Bluetooth devices.
• Auto or all channel widths for the 5GHz band ensures the best performance and compatibility with all devices. Wireless interference is less of a concern in the 5GHz band.

Set to Enabled, if your router is the only DHCP server on the network

DHCP (dynamic host configuration protocol) assigns IP addresses to devices on your network. Each IP address identifies a device on the network and enables it to communicate with other devices on the network and internet. A network device needs an IP address much like a phone needs a phone number.

Your network should have only one DHCP server. If DHCP is enabled on more than one device, such as on both your cable modem and router, address conflicts might prevent some devices from connecting to the internet or using network resources.

DHCP lease time

Set to 8 hours for home or office networks; 1 hour for hotspots or guest networks

DHCP lease time is the length of time that an IP address assigned to a device is reserved for that device.

Wi-Fi routers usually have a limited number of IP addresses that they can assign to devices on the network. If that number is depleted, the router can’t assign IP addresses to new devices, and those devices can’t communicate with other devices on the network and internet. Reducing DHCP lease time allows the router to more quickly reclaim and reassign old IP addresses that are no longer being used.

Set to Enabled, if your router is the only device providing NAT on the network

NAT (network address translation) translates between addresses on the internet and addresses on your network. NAT can be understood by imagining a company’s mail department, where deliveries to employees at the company’s street address are routed to employee offices within the building.

Generally, enable NAT only on your router. If NAT is enabled on more than one device, such as on both your cable modem and router, the resulting ”double NAT” might cause devices to lose access to certain resources on the network or internet.

Set to Enabled

WMM (Wi-Fi multimedia) prioritizes network traffic to improve the performance of a variety of network applications, such as video and voice. All routers that support Wi-Fi 4 (802.11n) or later should have WMM enabled by default. Disabling WMM can affect the performance and reliability of devices on the network.

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Apple provides two type families you can use in your iOS apps.

San Francisco (SF). San Francisco is a sans serif type family that includes SF Pro, SF Pro Rounded, SF Mono, SF Compact, and SF Compact Rounded. SF Pro is the system font in iOS, macOS, and tvOS; SF Compact is the system font in watchOS. Designed to match the visual clarity of the platform UIs, the system fonts are legible and neutral.

New York (NY). New York is a serif typeface that provides a unique tone designed to complement the SF fonts. NY works as well in a graphic display context (at large sizes) as it does in a reading context (at text sizes).

You can download the San Francisco and New York fonts here.

Beginning in iOS 14, the system provides the San Francisco and New York fonts in the variable font format. This format combines different font styles together in one file, and supports interpolation between styles to create intermediate ones. With interpolation, typefaces can adapt to all sizes while appearing specifically designed for each size.

Interpolation also enables optical sizing, which refers to the creation of different typographic designs to fit different sizes. In iOS 14 and later, the system fonts support dynamic optical sizes, merging a font’s discrete optical sizes — such as Text and Display for SF Pro and SF Compact, and Small, Medium, Large, and Extra Large for New York — into a single, continuous design. This design allows each glyph or letterform to be interpolated to produce a structure that’s precisely adapted to the point size.

NOTE Using variable fonts in a design tool that’s running on an earlier version of iOS may produce unexpected results. In this case, continue using Text and Display.

Because SF Pro and NY are compatible, there are many ways you can incorporate typographic contrast and diversity into your iOS interfaces while maintaining a consistent look and feel. For example, using both typefaces can help you create stronger visual hierarchies or highlight semantic differences in content.

Apple-designed typefaces support an extensive range of weights, sizes, styles, and languages, so you can design comfortable and beautiful reading experiences throughout your app. When you use text styles with the system fonts, you also get support for Dynamic Type and the larger accessibility type sizes, which let people choose the text size that works for them. For specific values, see Dynamic Type Sizes and Larger Accessibility Type Sizes. Size information, including tracking values, is also available in the Sketch, Photoshop, and Adobe XD Apple Design Resources for iOS.

The system defines APIs that make it easy to use the SF and NY typefaces; for developer guidance, see the withDesign method and SystemDesign structure of UIFontDescriptor.

SF Pro and SF Compact

The flexibility of the system fonts helps you achieve optimal legibility at every point size and gives you the breadth and depth you need for precision typesetting throughout your app.

SF Pro and SF Compact support:

• Over one hundred languages using Latin, Greek, and Cyrillic scripts
• Nine weights — from Ultralight to Black — in both uprights and italics
• Variable letter spacing that automatically adjusts based on the size of the text
• Small capitals, fractions, and inferior and superior numerals
• Dynamic optical sizes

For developer guidance, see the default property of the SystemDesign structure.

SF Pro Rounded and SF Compact Rounded

The rounded variant of the system fonts can help you coordinate your text style with the appearance of soft or rounded UI elements, or to provide an alternative typographic voice.

SF Pro Rounded and SF Compact Rounded support:

• Over one hundred languages using Latin, Greek, and Cyrillic scripts
• Uprights in nine weights — from Ultralight to Black
• Variable letter spacing that automatically adjusts based on the size of the text
• Small capitals, fractions, and inferior and superior numerals
• Dynamic optical sizes

For developer guidance, see the rounded property of the SystemDesign structure.

SF Mono

SF Mono is a monospaced variant of San Francisco — that is, a typeface in which all characters are equal in width. You typically use a monospaced typeface when you want to align columns of text, such as in a coding environment. For example, Xcode and Swift Playgrounds use SF Mono by default.

NOTE SF Pro uses the OpenType tabular lining feature to support the display of monospaced numbers and currencies.

SF Mono supports:

• Over one hundred languages using Latin, Greek, and Cyrillic scripts
• Six weights — from Light to Heavy — in both uprights and italics
• Monospacing across all weights (that is, changing the font weight doesn’t cause the text to reflow)
• Dynamic optical sizes

New York

New York is a classical serif typeface you can use in the interface or to provide a traditional reading experience.

• Over one hundred languages using Latin, Greek, and Cyrillic scripts
• Six weights — from Regular to Black — in both uprights and italics
• Variable letter spacing that automatically adjusts based on the size of the text
• Dynamic optical sizes

For developer guidance, see the serif property of the SystemDesign structure.

Choosing Fonts to Enhance Your App

Use built-in text styles whenever possible. The built-in text styles let you express content in ways that are visually distinct, while retaining optimal legibility. These styles — including headline, body, callout, and several sizes of title — are based on the system fonts and let you take advantage of key typographic features, such as Dynamic Type, which automatically adjusts tracking and leading for every font size. For developer guidance, see UIFontTextStyle.

Emphasize important information. Use font weight, size, and color to highlight the most important information in your app.

Prioritize content when responding to text-size changes. Not all content is equally important. When someone chooses a larger size, they want to make the content they care about easier to read; they don’t always want every word on the screen to be larger.

Minimize the number of typefaces you use in your interface. Mixing too many different typefaces can make your app seem fragmented and sloppy.

Modify leading to improve readability or conserve space. Leading is the space between lines of text. In some cases, text layouts work better when you increase or decrease this space. When you display text in wide columns or long passages, more space between lines (loose leading) can make it easier for people to keep their place while moving from one line to the next. Conversely, if you need to display two lines of text in an area where height is constrained — for example, in a list row — decreasing the space between lines (tight leading) can help the text fit well. If you need to display three or more lines of text, avoid tight leading even in areas where height is limited. The system defines API that lets you increase or decrease the space between lines by two points; for developer guidance, see loose and tight (SwiftUI), and traitLooseLeading and traitTightLeading (UIKit).

Make sure custom fonts are legible. Custom typefaces are supported on iOS, but may be tough to read, especially if they have stylistic attributes that make letterforms hard to discern when displayed at small sizes. Unless your app has a compelling need for a custom font — such as for branding purposes or to create an immersive gaming experience — it’s usually best to stick with the system fonts. Consider using a custom font for display text only; if you do use it for reading or interface text, make sure it’s legible, even at small sizes.

Implement accessibility features for custom fonts. System fonts automatically react to accessibility features like bold text and larger type. Implement the same behavior in apps that use custom fonts by making sure accessibility features are enabled and registering for notifications when they change. For guidance, see Text Size and Weight.

Adjust tracking as needed in interface mockups. In a running app, the system fonts dynamically adjust tracking at every point size. To produce an accurate interface mockup of a UI that uses the variable system fonts, you might need to adjust the tracking. For guidance, see the values listed in Tracking Values and available in Apple Design Resources.

NOTE iOS uses San Francisco as the system font for Latin, Greek and Cyrillic alphabets, and a variety of other typefaces for other scripts.

Dynamic Type Sizes

Dynamic Type provides additional flexibility by letting readers choose their preferred text size. Here are the weight, size, and leading values for each text style at different Dynamic Type sizes.

xSmall

Style	Weight	Size (points)	Leading (points)
Large Title	Regular	31	38
Title 1	Regular	25	31
Title 2	Regular	19	24
Title 3	Regular	17	22
Headline	Semi-Bold	14	19
Body	Regular	14	19
Callout	Regular	13	18
Subhead	Regular	12	16
Footnote	Regular	12	16
Caption 1	Regular	11	13
Caption 2	Regular	11	13

Point size based on image resolution of 144ppi for @2x and 216ppi for @3x designs.

Small

Style	Weight	Size (points)	Leading (points)
Large Title	Regular	32	39
Title 1	Regular	26	32
Title 2	Regular	20	25
Title 3	Regular	18	23
Headline	Semi-Bold	15	20
Body	Regular	15	20
Callout	Regular	14	19
Subhead	Regular	13	18
Footnote	Regular	12	16
Caption 1	Regular	11	13
Caption 2	Regular	11	13

Point size based on image resolution of 144ppi for @2x and 216ppi for @3x designs.

Medium

Style	Weight	Size (points)	Leading (points)
Large Title	Regular	33	40
Title 1	Regular	27	33
Title 2	Regular	21	26
Title 3	Regular	19	24
Headline	Semi-Bold	16	21
Body	Regular	16	21
Callout	Regular	15	20
Subhead	Regular	14	19
Footnote	Regular	12	16
Caption 1	Regular	11	13
Caption 2	Regular	11	13

Point size based on image resolution of 144ppi for @2x and 216ppi for @3x designs.

Large (Default)

Style	Weight	Size (points)	Leading (points)
Large Title	Regular	34	41
Title 1	Regular	28	34
Title 2	Regular	22	28
Title 3	Regular	20	25
Headline	Semi-Bold	17	22
Body	Regular	17	22
Callout	Regular	16	21
Subhead	Regular	15	20
Footnote	Regular	13	18
Caption 1	Regular	12	16
Caption 2	Regular	11	13

Point size based on image resolution of 144ppi for @2x and 216ppi for @3x designs.

xLarge

Style	Weight	Size (points)	Leading (points)
Large Title	Regular	36	43
Title 1	Regular	30	37
Title 2	Regular	24	30
Title 3	Regular	22	28
Headline	Semi-Bold	19	24
Body	Regular	19	24
Callout	Regular	18	23
Subhead	Regular	17	22
Footnote	Regular	15	20
Caption 1	Regular	14	19
Caption 2	Regular	13	18

Point size based on image resolution of 144ppi for @2x and 216ppi for @3x designs.

xxLarge

Style	Weight	Size (points)	Leading (points)
Large Title	Regular	38	46
Title 1	Regular	32	39
Title 2	Regular	26	32
Title 3	Regular	24	30
Headline	Semi-Bold	21	26
Body	Regular	21	26
Callout	Regular	20	25
Subhead	Regular	19	24
Footnote	Regular	17	22
Caption 1	Regular	16	21
Caption 2	Regular	15	20

Point size based on image resolution of 144ppi for @2x and 216ppi for @3x designs.

xxxLarge

Style	Weight	Size (points)	Leading (points)
Large Title	Regular	40	48
Title 1	Regular	34	41
Title 2	Regular	28	34
Title 3	Regular	26	32
Headline	Semi-Bold	23	29
Body	Regular	23	29
Callout	Regular	22	28
Subhead	Regular	21	28
Footnote	Regular	19	24
Caption 1	Regular	18	23
Caption 2	Regular	17	22

Point size based on image resolution of 144ppi for @2x and 216ppi for @3x designs.

Larger Accessibility Type Sizes

In addition to the standard dynamic type sizes, the system offers a number of even larger sizes for users with accessibility needs. Here are the weight, size, and leading values for each text style at the larger accessibility type sizes.

Style	Weight	Size (points)	Leading (points)
Large Title	Regular	44	52
Title 1	Regular	38	46
Title 2	Regular	34	41
Title 3	Regular	31	38
Headline	Semi-Bold	28	34
Body	Regular	28	34
Callout	Regular	26	32
Subhead	Regular	25	31
Footnote	Regular	23	29
Caption 1	Regular	22	28
Caption 2	Regular	20	25

Point size based on image resolution of 144ppi for @2x and 216ppi for @3x designs.

Style	Weight	Size (points)	Leading (points)
Large Title	Regular	48	57
Title 1	Regular	43	51
Title 2	Regular	39	47
Title 3	Regular	37	44
Headline	Semi-Bold	33	40
Body	Regular	33	40
Callout	Regular	32	39
Subhead	Regular	30	37
Footnote	Regular	27	33
Caption 1	Regular	26	32
Caption 2	Regular	24	30

Point size based on image resolution of 144ppi for @2x and 216ppi for @3x designs.

Style	Weight	Size (points)	Leading (points)
Large Title	Regular	52	61
Title 1	Regular	48	57
Title 2	Regular	44	52
Title 3	Regular	43	51
Headline	Semi-Bold	40	48
Body	Regular	40	48
Callout	Regular	38	46
Subhead	Regular	36	43
Footnote	Regular	33	40
Caption 1	Regular	32	39
Caption 2	Regular	29	35

Point size based on image resolution of 144ppi for @2x and 216ppi for @3x designs.

Style	Weight	Size (points)	Leading (points)
Large Title	Regular	56	66
Title 1	Regular	53	62
Title 2	Regular	50	59
Title 3	Regular	49	58
Headline	Semi-Bold	47	56
Body	Regular	47	56
Callout	Regular	44	52
Subhead	Regular	42	50
Footnote	Regular	38	46
Caption 1	Regular	37	44
Caption 2	Regular	34	41

Point size based on image resolution of 144ppi for @2x and 216ppi for @3x designs.

Style	Weight	Size (points)	Leading (points)
Large Title	Regular	60	70
Title 1	Regular	58	68
Title 2	Regular	56	66
Title 3	Regular	55	65
Headline	Semi-Bold	53	62
Body	Regular	53	62
Callout	Regular	51	60
Subhead	Regular	49	58
Footnote	Regular	44	52
Caption 1	Regular	43	51
Caption 2	Regular	40	48

Point size based on image resolution of 144ppi for @2x and 216ppi for @3x designs.

Tracking Values

To help you create accurate interface mockups, use the tracking values the system defines for various sizes of SF Pro, SF Pro Rounded, and New York.

SF Pro

Size (points)	Tracking (1/1000em)	Tracking (points)
6	+41	+0.24
7	+34	+0.23
8	+26	+0.21
9	+19	+0.17
10	+12	+0.12
11	+6	+0.06
12	0	0.0
13	-6	-0.08
14	-11	-0.15
15	-16	-0.23
16	-20	-0.31
17	-26	-0.43
18	-25	-0.44
19	-24	-0.45
20	-23	-0.45
21	-18	-0.36
22	-12	-0.26
23	-4	-0.10
24	+3	+0.07
25	+6	+0.15
26	+8	+0.22
27	+11	+0.29
28	+14	+0.38
29	+14	+0.40
30	+14	+0.40
31	+13	+0.39
32	+13	+0.41
33	+12	+0.40
34	+12	+0.40
35	+11	+0.38
36	+10	+0.37
37	+10	+0.36
38	+10	+0.37
39	+10	+0.38
40	+10	+0.37
41	+9	+0.36
42	+9	+0.37
43	+9	+0.38
44	+8	+0.37
45	+8	+0.35
46	+8	+0.36
47	+8	+0.37
48	+8	+0.35
49	+7	+0.33
50	+7	+0.34
51	+7	+0.35
52	+6	+0.33
53	+6	+0.31
54	+6	+0.32
56	+6	+0.30
58	+5	+0.28
60	+4	+0.26
62	+4	+0.24
64	+4	+0.22
66	+3	+0.19
68	+2	+0.17
70	+2	+0.14
72	+2	+0.14
76	+1	+0.07
80	0	0
84	0	0
88	0	0
92	0	0
96	0	0

Not all apps express tracking values as 1/1000em. Point size based on image resolution of 144ppi for @2x and 216ppi for @3x designs.

SF Pro Rounded

Size (Points)	Tracking (1/1000em)	Tracking (points)
6	+87	+0.51
7	+80	+0.54
8	+72	+0.57
9	+65	+0.57
10	+58	+0.57
11	+52	+0.56
12	+46	+0.54
13	+40	+0.51
14	+35	+0.48
15	+30	+0.44
16	+26	+0.41
17	+22	+0.37
18	+21	+0.37
19	+20	+0.37
20	+18	+0.36
21	+17	+0.35
22	+16	+0.34
23	+16	+0.35
24	+15	+0.35
25	+14	+0.35
26	+14	+0.36
27	+14	+0.36
28	+13	+0.36
29	+13	+0.37
30	+12	+0.37
31	+12	+0.36
32	+12	+0.38
33	+12	+0.39
34	+12	+0.38
35	+11	+0.38
36	+11	+0.39
37	+10	+0.38
38	+10	+0.39
39	+10	+0.38
40	+10	+0.39
41	+10	+0.38
42	+10	+0.39
43	+9	+0.38
44	+8	+0.37
45	+8	+0.37
46	+8	+0.36
47	+8	+0.37
48	+8	+0.35
49	+8	+0.36
50	+7	+0.34
51	+6	+0.32
52	+6	+0.33
53	+6	+0.31
54	+6	+0.32
56	+6	+0.30
58	+4	+0.25
60	+4	+0.23
62	+4	+0.21
64	+3	+0.19
66	+2	+0.16
68	+2	+0.13
70	+2	+0.14
72	+2	+0.11
76	+1	+0.07
80	0	0.00
84	0	0.00
88	0	0.00
92	0	0.00
96	0	0.00

Not all apps express tracking values as 1/1000em. Point size based on image resolution of 144ppi for @2x and 216ppi for @3x designs.

New York

Size (Points)	Tracking (1/1000em)	Tracking (points)
6	+40	+0.23
7	+32	+0.22
8	+25	+0.20
9	+20	+0.18
10	+16	+0.15
11	+11	+.12
12	+6	+0.07
13	+4	+0.05
14	+2	+0.03
15	+0	+0.00
16	-2	-0.03
17	-4	-0.07
18	-6	-0.11
19	-8	-0.15
20	-10	-0.20
21	-10	-0.21
22	-10	-0.23
23	-11	-0.25
24	-11	-0.26
25	-11	-0.27
26	-12	-0.29
27	-12	-0.32
28	-12	-0.33
29	-12	-0.34
30	-12	-0.37
31	-13	-0.39
32	-13	-0.41
33	-13	-0.42
34	-14	-0.45
35	-14	-0.48
36	-14	-0.49
38	-14	-0.52
40	-14	-0.55
42	-14	-0.57
44	-14	-0.62
46	-14	-0.65
48	-14	-0.68
50	-14	-0.71
52	-14	-0.74
54	-15	-0.79
58	-15	-0.85
62	-15	-0.91
66	-15	-0.97
70	-16	-1.06
72	-16	-1.09
80	-16	-1.21
88	-16	-1.33
96	-16	-1.50
100	-16	-1.56
120	-16	-1.88
140	-16	-2.26
160	-16	-2.58
180	-17	-2.99
200	-17	-3.32
220	-18	-3.76
240	-18	-4.22
260	-18	-4.57

Not all apps express tracking values as 1/1000em. Point size based on image resolution of 144ppi for @2x and 216ppi for @3x designs.

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