The problem nobody wants to admit
Fitness apps ask too much of you during a session. Logging a set means: open app, find exercise, enter weight, enter reps, confirm, go into settings to start a timer, wait, restart. That's cognitive work during a moment that should be reserved for physical focus.
Smart Sets reduces every interaction to under 3 seconds.
What happens the moment you log a set
1. The rest timer starts automatically. Nothing to configure. The moment you confirm a set, the countdown begins. The duration is the one defined in your program by your coach, or one you set once and for all.
2. The screen reduces. You see the timer, the pre-filled next set, and nothing else. ZON doesn't ask you to interact until rest is over.
3. Your wrist notifies you. At the end of rest, a haptic vibration arrives on your wrist or phone (iPhone, Android, or Apple Watch). No need to watch the screen. Look at the bar, not your phone.
4. Your next set is already ready. Previous set weight and reps are pre-filled. If you're keeping the same load, validate in one tap. If you're going up or down, adjust in 2 seconds. Zero re-entry.
Rest timers that are actually smart
Smart Sets doesn't offer a single global timer. It manages per-exercise rest durations:
Exercise A (heavy squats) gets 3 minutes. Exercise B (bicep curls) gets 90 seconds. ZON knows which timer to apply based on the current exercise. Your coach can pre-configure these durations inside the program and they apply automatically, nothing to change on your end.
Result: shorter sessions, same density
By eliminating the micro-friction between each set, Smart Sets lets you cut total session time by 10 to 20% without sacrificing volume. Same sets, same intensity, less time wasted.
Available on iOS and Android (private beta). Apple Watch and Live Activities compatible.