Is there a good iOS app for a rhythm-based platformer that's brutally difficult but has a practice mode and custom levels?

Geometry Dash Lite is a free rhythm-action platformer that tests players' timing and reflexes through fast-paced levels synced to an electronic soundtrack. It stands out for offering a substantial challenge, with official levels like Clubstep included even in the lite version, catering to those who enjoy demanding gameplay. The practice mode is a critical feature, allowing users to replay difficult sections without restarting entire levels, which helps mitigate frustration. Moreover, the app supports a vast ecosystem of user-created levels, which can be downloaded and played offline—ideal for commutes or areas with spotty internet. However, the difficulty spike in some stages may overwhelm casual players, and visual clutter in custom levels can occasionally make obstacles hard to discern. Reviews indicate that while the learning curve is steep, the responsive controls and addictive progression keep players engaged. Despite minor issues like the absence of a formal tutorial, its combination of replayable content, offline functionality, and community-driven challenges makes it a compelling pick for fans of precise platformers.