Newly into code
This has been really helpful as a new person getting the code being able to read the different things that I’m building without having to be in front of a computer.
Free
In-App Purchases
About
Review and understand source code on your mobile device. Features syntax highlighting for over 40 languages, code structure analysis, and customizable reading options. Offers a private experience with no accounts or tracking.
✓Syntax highlighting for 40+ languages
✓Code structure analysis with tree-sitter
✓Sticky scope headers
✓Symbol outline for navigation
✓Adjustable font size and themes
✓Open code from various sources (files, URLs, clipboard)
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What's New in Aperio
1.1
September 28, 2026
Browse GitHub & GitLab repos
1
Subscriptions & In-App Purchases
$9.99
Aperio Pro
Unlock Focus Mode, themes, fonts & caching
User reviews
FAQ
What is Aperio?
Aperio is a mobile application designed for reading source code on iPhones and iPads. It focuses on providing a comfortable reading experience with features like syntax highlighting and code structure analysis, rather than code editing.
What programming languages does Aperio support?
Aperio supports syntax highlighting for over 40 programming languages, including popular ones like Swift, Python, JavaScript, Java, C++, and Go, among many others.
How does Aperio help understand code structure?
Aperio uses tree-sitter to parse code, enabling features like sticky scope headers that keep the current function or type visible, and a symbol outline to quickly navigate through classes, functions, and properties.
Is Aperio private and secure?
Yes, Aperio is designed for privacy. It has no accounts, analytics, or tracking. Files you open remain on your device, and network access is limited to loading URLs you explicitly request.
What features are unlocked with Aperio Pro?
Aperio Pro is a one-time purchase that unlocks unlimited URL loading, offline caching, unlimited bookmarks per file, full recents history, Focus Mode, and six additional themes, including an OLED theme.
Does Aperio have ads?
No, Aperio does not contain advertisements. The core functionality is free, with an optional one-time purchase for additional Pro features.
What devices is Aperio compatible with?
Aperio is available for iPhone and iPad devices, offering a tailored experience for each platform.
How often is Aperio updated?
Aperio was last updated on August 31, 2026, with version 1.0. Future updates will likely continue to enhance features and language support.