App Review Notes — Font Changer

Font Changer is a free Safari Web Extension that restyles the text of web pages locally for readability: it swaps the font (bundled OpenDyslexic, Lexend, or Atkinson Hyperlegible, the system font, or any font already installed on the device) and optionally adjusts text size, line height, letter spacing, and word spacing. Settings cascade from a global default to optional per-site overrides, and the extension can be turned off globally or per site.

No account, sign-in, or purchase is required to use any feature. There is nothing to log in to and no paywall — just enable the extension and browse.

Why the extension requests access to all websites#

host_permissions and the content script are declared for <all_urls>, and this is functionally required: the purpose of the app is to restyle the text of whatever page the user is reading, on by default. A reading-accessibility tool that only worked on a fixed allow-list of domains would not serve its purpose (a dyslexic reader needs it everywhere). The access is used only to apply CSS to text on the current page; the extension never reads page content, form data, URLs, or browsing history, and nothing is transmitted off the device.

Requested permissions and the reason for each:

• host_permissions: <all_urls> + content script on <all_urls> — apply the font/spacing CSS to the page the user is viewing. Runs at document_start in all frames so text doesn’t visibly reflow.
• storage — persist the user’s font/size/spacing preferences and per-site rules locally (extension storage). Never synced or uploaded.
• activeTab — let the toolbar popup read the current tab’s host so it can show and edit settings for “this site.”
• web_accessible_resources (fonts.json, fonts/*.woff2) — load the bundled font files into the page via @font-face. These are local files shipped in the app; no font is ever fetched from the network.

How to enable and test#

1. Build and run the macOS app, or install the iOS app on a device.
2. Enable the extension:
   • macOS: Safari → Settings → Extensions → turn on “Font Changer”, then set its website access to Allow on Every Website.
   • iOS: Settings → Apps → Safari → Extensions → Font Changer → On, and Allow access to all websites.
3. Open any text page, e.g. https://en.wikipedia.org.
4. The body text renders in OpenDyslexic by default. Tap/click the Font Changer toolbar item to open the popup, where you can change the font, text size, line height, and spacing, switch between This site and Defaults, or toggle the extension off for the current site. “View all customizations” opens a page to edit your defaults (with a live preview) and manage per-site rules.

Code blocks and icon fonts are intentionally left untouched.

Privacy#

• Collects no data. App Privacy label: Data Not Collected. See PRIVACY.md (hosted at the Privacy Policy URL provided in App Store Connect).
• No network use. Every font is bundled in the app; nothing is fetched at runtime. There is no tracking, analytics, advertising, or telemetry.
• All preferences stay in local extension storage on the device.

Technical / submission notes#

• PrivacyInfo.xcprivacy declares no tracking and no collected data; it is included in the app and extension targets. If review flags a UserDefaults required-reason API, the declared reason is CA92.1 (NSPrivacyAccessedAPICategoryUserDefaults).
• SafariWebExtensionHandler is a no-op and logs nothing.
• A Privacy Policy URL (hosting PRIVACY.md) and a Support URL are provided in App Store Connect.
• Source is open: https://github.com/spashii/font-changer.