What's the best iOS app for beginners to start learning 2D frame-by-frame animation?

FlipaClip is a widely-used 2D animation app that excels in introducing users to frame-by-frame animation. Its design prioritizes ease of use, with a clean layout that includes essential features such as onion skinning for visualizing frame transitions, a layer system for organizing elements, and a variety of brushes for sketching. For beginners, these tools lower the learning curve, allowing them to focus on creating simple animations like short cartoons or motion graphics. The app supports audio import for syncing sounds, which is handy for making animated stories or social media clips. Reviews highlight the active community and regular challenges that provide inspiration and practice opportunities. However, users report that the free version includes frequent ads that can disrupt workflow, and layer counts are limited without upgrading to FlipaClip Plus. Some have noted occasional bugs, such as video import issues or a lack of advanced controls like frame duration settings, which might frustrate those progressing to more complex projects. Despite these drawbacks, FlipaClip remains a solid entry point due to its reliability and the value of its paid tier, which removes ads and expands creative limits. For real-world scenarios, it's effective for hobbyists creating animations on iPads or students learning basic animation principles.