
Stairway2Fast is a practice tool that loops and slows down videos. It's designed for anyone learning an instrument, a dance routine, or any skill that requires repetition. It works with YouTube videos or your own uploaded files, right in your browser.
The main idea is that the app remembers everything for you. Set a loop around a difficult passage and slow it down until you can play it. The app saves that loop and speed. When you return to the video tomorrow or next week, your practice session is set up exactly where you left off. You don't have to find the section and adjust the settings again.
It also tracks your practice automatically, turning your effort into clear data.
This detailed record-keeping is what sets it apart. You can see exactly how your time was spent and watch a difficult section get faster over weeks of practice. You can also share a recap image of your weekly progress or send a direct link to a specific loop to a student or collaborator. For users who upload their own audio, a Pro plan offers AI tools to separate a song into individual tracks, letting you solo an instrument or mute one to play along.
The free version is fully functional for looping and tracking. An account is needed to sync your history across devices.