Round timer
Set work, rest, and round count. Bell on start, ten-second warning before the end, bell on rest. Defaults match standard boxing intervals — 12 × 3:00 with 60s rest.
— FREE IPHONE APP
Drill on
the bag.
Shadowbox
at home.
Boxerium calls your combos out loud while you box. Round timer, rest, ten-second warning, and a metronome — all built in.
- ROUND TIMER
- COMBO CALLOUTS
- CUSTOM WORKOUTS
Round timer. Combo callouts. Custom workouts.
Build a workout once. Run it forever. Bell on round start, ten-second warning before the end, spoken combos at whatever interval you set — never the same order twice.
What it does
Spoken combo callouts
Type any combo as plain text or build it from a list of techniques. The app speaks one of your combos out loud at the interval you set — random each time, so you don't memorize the order.
Custom workouts
Different rounds can have different combos, work times, and rest. Save your favorite workouts and start them with one tap. Share them with training partners via link.
— A NOTE FROM THE BUILDER
Why I built this
I built Boxerium because every interval timer I tried at the bag was either set up for CrossFit, locked behind a $9.99/month subscription for what's basically a stopwatch, or covered in ads that popped up mid-round. None of them called combos out loud — you still had to think up what to throw.
So I built one. It rings the bell, calls combos, counts the rest, and stays out of your way. Free, no account, no subscription. The only ad is a single banner you can remove for a couple of dollars a month if you want — no feature is locked behind it.
If something's annoying, tell me and I'll fix it.
— ETHAN · BUILDER OF BOXERIUM
FAQ
Is it really free?
Yes. The app is free with a single banner ad. You can pay to remove the banner if it bothers you — but no features are locked.
Does it work without internet?
Yes, everything runs on-device. The only thing needing internet is the ad — and if you've removed ads, the app makes no network requests.
Is there an Android version?
Not yet. If enough people ask, I'll port it.
What iPhone do I need?
iOS 15.5 or later — anything from iPhone 6s on.
Can I share workouts with training partners?
Yes, every workout has a share link. Tap share, send the link, the recipient opens it in Boxerium and it imports straight in.
The voice sounds robotic.
It's the iPhone's built-in voice. You can change it in Settings → Callout voice. Try "Samantha" or "Daniel" — they read boxing terms better than most.
Free on iPhone.
No account. No subscription. Just box.