Which iOS app should I use for developing games across multiple devices without losing progress?

GDevelop is a comprehensive game development platform available on iOS that enables users to design, build, and test games directly from their iPhones. Its standout feature for cross-device workflow is automatic cloud saving, which syncs projects across iOS, Android, web browsers, and desktop applications. This means a hobbyist can sketch out game mechanics during a commute on their iPhone, then later polish levels on a Windows or macOS computer without manual transfers. The app employs a visual event system for creating game logic without traditional coding, supplemented by pre-built behaviors for common actions like movement or collisions, and an integrated asset library for sprites and sounds. Real-world scenarios include prototyping a 2D platformer or puzzle game iteratively across devices, with the ability to export finished projects to various platforms. Reviews indicate that users appreciate the seamless sync, noting it eliminates friction in creative workflows. However, the learning curve can be steep for absolute beginners despite extensive tutorials and YouTube resources, and some users report occasional bugs like screen freezes or crashes on older iPhone models. Additionally, while the core app is free, advanced features or asset packs may require in-app purchases, which has drawn mixed feedback. For those seeking a flexible, mobile-first tool to dabble in game creation without being tied to one device, GDevelop provides a practical solution with room for improvement in stability.