HR Broadcast
Apple WatchComing soon
Turns your Apple Watch into a standard Bluetooth heart-rate sensor. Zwift, gym equipment and bike computers pair with the watch, just like a chest strap.
Independent app studio
Useful little apps, built at the bench.
ButtonBench makes focused apps for iPhone and Apple Watch. Our first two are for people who train: HR Broadcast turns your Apple Watch into a heart-rate strap, and Centurion counts your reps with the camera.
On the bench
HR BroadcastApple Watch · your heart-rate strap
CenturioniPhone · counts reps with the camera
+Next appIn the works. Want to hear first? Drop us a line.
Our apps
Train with what you already own.
No chest strap, no gadgets to charge. Your Apple Watch and iPhone already have the sensors. We write the software that puts them to work.
Centurion
iPhoneComing soon
Prop up your phone and train. The camera counts push-ups, sit-ups, squats and jumping jacks, and a ladder of workouts takes you to your goal.
How we build
Our default settings.
Every ButtonBench app ships with these switched on. They don't have an off position.
One job, done properlyEach app does one thing well, and helps from the first minute.
Native to AppleWritten in Swift for iPhone and Apple Watch, using the sensors you already carry.
Honest numbersA late reading says it's late. No frozen numbers, no reps you didn't do.
Private by defaultYour workouts stay on your devices. No account, no servers in between.
No ads, no trackingWe make money from apps, not from your attention or your data.
Works offlineNeither app needs an internet connection to do its job.
On the bench
What we're working on.
We build in the open. Here's what's on the bench right now, newest first.
NOV 2026 · CENTURION 0.6
Exercises, Workout and Compete in one place
A new home screen with a switch between the three, a more realistic training figure and a lot of polish. Circuit workouts are next.
NOV 2026 · HR BROADCAST
Workout mode
While it broadcasts, your watch now reads power meters, smart bikes and treadmills, with up to four big numbers per screen and laps saved to Health.
NEXT
Real rides, then the App Store
Testing both apps on real workouts, then releasing them. Want a note when they're out? Write to us.
Got an idea, a bug or a question?
Write to us. A real person reads every message.