Interval timer · iPhone, iPad & Apple Watch
RoundShift is the interval timer for people who actually train. Build any workout — Tabata, EMOM, circuits with warm-ups, rest and recovery — then run it with a screen you can read from across the gym and a voice that calls every change.
Why RoundShift
Color is the interface. Every phase has its own hue — amber to get ready, red to work, teal to rest — so you know where you are without reading a single word.
Repeat blocks, named exercises, warm-ups, recovery rounds. Classic on/off timers or fully custom intervals — reorder, duplicate, and undo as you go.
Type or dictate "3 rounds of 40 on 20 off with a 2 minute warm up" and RoundShift builds the timer. Review it, tweak it, run it.
Recorded voice cues call every exercise and phase change, so your phone can stay on the floor while the music stays on.
Pair a heart-rate monitor and RoundShift can hold your rest until your heart rate recovers — train to your body, not the clock.
A calendar of every session, weekly minutes at a glance, and workouts logged straight to Apple Health.
Every routine becomes a QR code. Your training partner scans it and has the exact same workout in one tap.
Everywhere you train
Start from the Watch without your phone, glance at the Dynamic Island mid-set, or launch a favorite preset straight from a widget.
Describe it
The fastest interval builder is a sentence. RoundShift parses plain English — rounds, work/rest splits, warm-ups, named exercises, even "tabata" — into a timer you can see before you commit. Nothing runs until you say so.
Pricing
No subscription, no account, no ads. The free app is a complete timer; Pro unlocks the deep stuff for less than a gym smoothie.
Get RoundShift
Free on the App Store for iPhone, iPad and Apple Watch. Android is on the way.