Brings Git powers to all your iOS apps
Ranked in these QuestionsQuestion Ranking
Pro Allows other apps to access files
Working copy integrates with other apps to allow them to access and edit files through iOS8 document picker.
Pro Not just GitHub, works offline
Works with any Git remote, not just GitHub.
Clones to device letting you work offline and push when convenient.
Extends your other applications with iOS 8 app extensions.
Pro Clean UI
Pro Frequent updates by the developer
Supports latest iOS features.
Pro Built in diff tool
Diff tool allows viewing of changes between versions
Pro Markdown support
Displays a preview of markdown files without external apps
Con Push is considered premium
The "free" version is not very useful if you can't do a push and $15.99 seems way overpriced for basic functionality. Limiting the amount of manageable repositories to 2-3 could be a solution here.
Con Does not support multiple Github accounts
If you want better features you will have to pay.