Feel the tempo, don't count it.
The first timer built specifically for tempo training. Your brain handles the lifts — TimerBro handles the math.
14-day free trial · No credit card required · $4.99/month after
Lose count mid-set
"Was that rep 8 or 9? Guess I'll do another."
Timer lost in gym noise
Loud music, clanging plates — every beep disappears.
Phone kills your focus
Notifications, Instagram, Spotify — it never ends.
Feel the tempo, don't count it
Pulsing audio guides every phase. Your brain stays on form.
Your music keeps playing
Tempo audio cues mix with your music. Your playlist continues — timer rides on top of it.
Lock your screen and lift
Works with locked screen — no notifications, no distractions. Got an Apple Watch? Full wrist control as a bonus.
Built for real gym sessions, not perfect demo conditions.
Drag-and-drop exercises, set tempo notation (3-1-2-1), configure sets, reps, and rest. Done once, reused forever.
Lock your phone, press play, and follow the audio. TimerBro handles phases, rest, and progression. Got an Apple Watch? Control everything from your wrist — no iPhone needed mid-set.
History logs every session with time under tension, completion rate, and heart rate. See the work your muscles actually did.
Drag exercises into order, dial in your tempo (3-1-2-1), set reps and rest. Build it once — TimerBro runs it every time.
Tempo notation is four numbers: eccentric — pause — concentric — pause. 3-1-2-1 means 3s down, 1s pause at bottom, 2s up, 1s pause at top.
3 sets × 12 reps can mean 30 seconds or 90 seconds of actual muscle work. Most apps count reps. TimerBro measures when you lift.
Time Under Tension is auto-calculated per exercise and per session — no manual input, no guesswork. Just your real training data.
The only app that does this automaticallyExponential deceleration through each phase — fast then slow, naturally. Works over gym music. Unique to TimerBro.
Start, pause, and resume from your wrist. Always-on display shows your exercise, phase, and heart rate throughout every set.
Auto-calculated time under tension per exercise and per session. See the work your muscles actually did.
Music keeps playing. Tempo audio mixes with your playlist — it doesn't replace it. Proper audio mixing.
Close your Activity Rings from iPhone alone — no Watch needed. When you do have Apple Watch connected, heart rate is tracked throughout every set.
Skip exercises, navigate out of order, adjust on the fly. Skipped sets are marked, not deleted. Because gyms are never perfect.
No Apple Watch? TimerBro is a complete iPhone app. The Watch is just a bonus remote — not a requirement.
Try everything free. No credit card required.
Everything included in both plans
Build workouts during your trial. Your data stays safe — no deletion if you pause.
