Support

We read every message. Reach a real person — there are two of us.

Email berinshteyn@gmail.com with anything at all: a bug, a drill idea, a question, or just to say hello. Including your device and iOS version helps us help you faster. We aim to reply within a couple of days.

Common questions

How do I start a warm-up?

Open the Today tab and tap Start warm-up. You get a short, freshly shuffled set of reaction drills every time. Each drill opens with a one-screen lesson; tap I’m ready to play.

How is my reaction time measured?

Stillfast times from the exact frame a stimulus is shown on screen to the frame your tap is registered, so the number reflects your real reaction, not a stopwatch estimate. The Labs tab leads with your fastest reaction, your weekly average, and whether you’re trending faster or slower.

How do I set the difficulty?

On the Train tab, the Difficulty card sets the level for every drill at once, or tap Test me to run a quick calibration that picks your level for you. You can also override any single drill from its row.

How do I export or delete my data?

Everything lives on your device and in your own private iCloud — we never receive it. In the app, go to Profile → Data. Export all data produces a clean report you can share with a coach or keep. Delete all data permanently removes your profile, results, playlists, and games from this device and iCloud, and restarts onboarding. This cannot be undone.

Does Stillfast use Apple Health or track me?

No. There is no advertising and no third-party tracking, and Stillfast does not read or write Apple Health. The only optional integration is read-only Apple Calendar, used to remind you to warm up before a game; you can unlink it anytime in Profile. See our Privacy Policy.

What do I need to run it?

An iPhone or iPad running a current version of iOS or iPadOS. An Apple Watch companion is included for quick reaction checks on the wrist.

Still stuck?

Email berinshteyn@gmail.com and we’ll sort it out with you.