Focus apps act after you've opened the app. Undertow acts on the reach: one button, ten seconds, back to work.
Mid-task, your phone buzzes and you feel the pull to check it. Tap Pulled instead of reaching for it — a 10-second ride-out, then straight back into the session. Most urges pass in ten seconds if you give them somewhere to go.
Free to use. $3.99 one-time (no subscription) adds optional Screen Time app blocking during a session. No streaks that lie, no social feed, no guilt trip.