VO2Cue

YOUR EYES-FREE INTERVAL COACH

Your effort.
Our cues.

Get into your workout. VO2Cue keeps the intervals moving with clear timers, Apple Watch haptics, tones, and optional voice cues.

Download on the
App StoreSee how it works

For iPhone & Apple Watch · Open source · No account required

4 × 4Your classic interval session
Your paceCustom workouts & cues
VO2Cue live timer showing Sprint, round 1 of 4, 3 minutes 54 seconds remaining, and End, Pause, and Skip controls.
The live interval timer in VO2Cue on Apple Watch.
A glance when you need it.
A cue when you don’t.
ONE COACH. YOUR KIND OF CARDIO.

Swim · Run · Cycle · Row · Train

A LOOK INSIDE

Simple setup.
Clear focus.

Build the session that fits your day, follow each interval, and keep a record of the work you put in.

VO2Cue workout library with saved interval profiles.
01 / CHOOSE

Your workout library

Start with the classic 4×4 or keep your own go-to sessions ready.

VO2Cue workout profile with duration, interval settings, and cues.
02 / MAKE IT YOURS

Every interval, your way

Set work, recovery, rounds, warmup, cooldown, and the cues you want.

VO2Cue History screen with workout totals and recent sessions.
03 / KEEP GOING

Progress that stays yours

Review recent sessions and total minutes in your local workout history.

Actual app screenshots with example workouts and history.

YOUR FIRST SESSION

Ready in
a few taps.

Set it up on your iPhone. Train with your phone or start a session from your Apple Watch.

THE CLASSIC 4×410 min warmup

4 min hard effort + 3 min recovery between efforts, for 4 rounds.

35 minutes total · Optional cooldown

  1. Choose or create a workout

    Open the Workouts tab and select a profile. Tap the + button to create one, or open a saved workout and tap Edit.

  2. Set your intervals and cues

    Choose your activity, work and recovery durations, repeat count, warmup, and cooldown. Enable haptics, tones, or voice cues and customize the cue labels.

  3. Start and follow the cues

    Tap Start workout on the workout detail screen. On Apple Watch, open VO2Cue and choose a workout; profiles sync from your iPhone when connected. Use Pause, resume, Skip, or End as needed.

  4. Review your session

    Open History after your workout. To also save completed workouts to Apple Health, open Settings, enable Save completed workouts, and tap Request Health access.

OPEN SOURCE. OPEN TO YOUR IDEAS.

Help build VO2Cue.
Get a lifetime thank-you.

VO2Cue is open source under the MIT License. Everyone is welcome to help with bug fixes, new features, accessibility, documentation, and tests.

A free lifetime subscription for a successful pull request.

When the maintainer accepts and merges your contribution, you get a free lifetime subscription to VO2Cue. A merge request (MR) is called a pull request (PR) on GitHub. The reward applies to accepted, merged PRs; submitting a PR or opening an issue alone does not qualify.

Start with an issue to discuss your idea, especially for larger changes. After your PR is merged, ask in the PR thread to arrange your reward with the maintainer. Keep private account and payment details out of public comments.

Read the contribution guide Explore the source on GitHub

LESS CLOCK-WATCHING. MORE TRAINING.

Make your next
session count.

No account. No ads. No tracking.
Your profiles and VO2Cue history stay on your devices.

Download on the
App Store