Aperio - Code Reader

Read code on iPhone and iPad

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

Now with a guided sample file, sticky scope headers that follow you as you scroll, and a symbol outline for jumping straight to any definition. Aperio is a code reader for iPhone and iPad. Not an editor — a reader. It is built for the times you want to actually read source code on your phone: reviewing a pull request on the train, checking how a library works, or reading a file someone just sent you. Open code from anywhere • Share a file or a GitHub link to Aperio from any app • Open files from the Files app, iCloud Drive, or another app's "Open In" • Paste a snippet straight from the clipboard • Load a URL from GitHub, Gist, or GitLab — Aperio finds the raw file for you Built to be read Syntax highlighting for more than 40 languages, with themes designed for long reading sessions. Adjust the font size by pinching, turn line numbers and word wrap on or off, and pick a theme that suits the light you are in. Understand the structure, not just the text Aperio parses your code with tree-sitter, the same engine used by modern editors, so it understands the shape of a file: • Sticky scope headers pin the enclosing type and function to the top of the screen, so you always know where you are • A symbol outline lists every class, struct, function, and property — tap one to jump straight to it • Bookmarks save the lines you want to come back to • Search jumps between matches with a running count Yours, and private Aperio has no accounts, no analytics, and no tracking. Files you open stay on your device. The app talks to the network only when you ask it to open a URL, and then only to the address you gave it. Aperio Pro Aperio is free to use, including bookmarks, the symbol outline, sticky headers, and five URL loads a month. A single one-time purchase — no subscription — unlocks: • Focus Mode, which dims everything outside the block you are reading • Unlimited URL loading • Offline caching of URL-loaded files • Unlimited bookmarks per file • Your full recents history • Six additional themes, including a true-black OLED theme Languages Swift, Python, JavaScript, TypeScript, JSON, YAML, HTML, CSS, Rust, Go, Java, C, C++, Ruby, Bash, Kotlin, Dart, PHP, Scala, Haskell, Elixir, Lua, R, SQL, Dockerfile, TOML, Terraform, Zig, Objective-C, C#, Perl, OCaml, Clojure, Erlang, Julia, Groovy, PowerShell, Nix, Markdown, LaTeX, Protobuf, GraphQL, and more.

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The developer, Brendan Buono, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    • Brendan Buono
    Size
    • 18.3 MB
    Category
    • Developer Tools
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • iPad
      Requires iPadOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    • English
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    • © 2026 Brendan Buono
  • Privacy Policy