Stop scrolling.
Start lifting.
Kalaku’s rest timer doesn’t just beep — when your rest is up, it takes over your whole screen and puts you back to work. No more losing 20 minutes to your phone between sets.
You know the trap.
You finish a set, sit down, “just check something” — and ten minutes later you’re still scrolling, cold, and behind on your workout. Kalaku breaks the loop.
The full-screen interrupt
Set your rest, put the phone down (or don’t). When the timer hits zero, Kalaku launches a full-screen “get back to it” screen that cuts through whatever you were doing — even over the lock screen. It’s impossible to ignore, and that’s the point.
Built for lifters, not scrollers
Rest timer that interrupts
Full-screen, vibrating, over-the-lock-screen. Your rest ending is unmissable.
Plate math, instantly
Tell it the target weight; it tells you the plates per side. Native C++ core, zero lag.
Log & track progress
Record sets and watch the numbers climb, session over session.
Runs in the background
The timer survives a locked screen and a pocketed phone — it’s still counting.
Yours, on your device
No account, no feed, no ads shoving you back into the scroll. Just training.
Fast and focused
Opens instantly, does its job, gets out of your way. A tool, not a time-sink.
Three taps to a better workout
Set your rest
Pick your interval between sets.
Train
Lift, then rest. Phone in pocket or not — the timer’s running.
Get called back
Rest’s up? Kalaku takes the screen and sends you back to the bar.
Put the phone down. Pick the bar up.
Kalaku is launching free on Google Play. Android first.