One-tap repeats
Start a familiar work-and-rest interval immediately, with the most recent settings already waiting.
HIIT timer for iPhone and Apple Watch
Move when the cue says move.
Build fast work-rest intervals or a complete named circuit. RoundCue keeps the timer readable, calls the changes clearly and lets every exercise have its own time, color and sound.
Simple when you want it
From repeating intervals to complete circuits.
Quick Start remembers your latest work time, rest time and round count. When a workout needs more structure, advanced profiles can describe the full session exercise by exercise.
Named exercises
See Squats, Mountain Climbers or Recovery instead of a generic round number.
Different times and colors
Give each exercise its own duration and color so effort, transition and recovery phases are unmistakable.
Example setups
Start with a familiar interval format.
These examples are starting points, not exercise prescriptions. Choose movements and intensity appropriate to your ability and guidance.
| Format | Work | Recovery | RoundCue setup |
|---|---|---|---|
| Balanced intervals | 30 seconds | 30 seconds | Quick Start with repeating rounds |
| Tabata-style | 20 seconds | 10 seconds | Eight rounds with warning cues |
| Named circuit | Varies by exercise | Planned transitions | Advanced profile with titles, colors and custom commands |
| EMOM structure | Exercise at the minute start | Remainder of minute | One-minute named rounds with a start cue |
Hands-free instructions
Turn your own voice into workout cues.
Record or import commands and place them at exact elapsed times inside a round. You can announce the next movement, remind yourself about form, or signal a change in pace without returning to the phone.
Movement changes
Use a custom command such as “switch sides” halfway through an interval.
Form reminders
Add short, useful prompts that keep the session focused without cluttering the screen.
Next-round callouts
Name exercises so RoundCue can make each phase easier to recognize as it begins.
Apple Watch
Intervals on your wrist, progress in Health.
Start Quick Start or saved profiles from Apple Watch, use haptics when sound is impractical, and record supported workouts to Apple Health. Live mirroring can keep the same timer visible on iPhone across the room.
Silent haptic cues
Feel countdown, interval-start, warning and interval-end patterns from the wrist.
Mirrored display
Use iPhone as a larger live screen while Apple Watch remains the workout owner.
Workout history
Review completed sessions in RoundCue’s log, charts, calendar and progress insights.
Build a circuit
Make every phase obvious.
Add exercises
Create a round for each movement, transition or recovery phase.
Set times and colors
Choose a duration and visual treatment that fits each phase.
Add useful commands
Place custom audio prompts only where they make the workout easier to follow.
HIIT timer FAQ
Common questions.
Can RoundCue run a Tabata timer?
Yes. Set 20-second work rounds, 10-second breaks and eight rounds in Quick Start, or save the setup as an advanced profile with extra customization.
Can every exercise use a different interval length?
Yes. Advanced profiles support individual round and break durations, titles, colors and sound overrides.
Can I hear exercise instructions during a HIIT workout?
Yes. Record or import custom audio and place commands at exact elapsed times within individual rounds.
Your intervals, your cues
Build the session once. Start it in one tap.
Download RoundCue free on the App Store.