Need help with the app? Start here.
CONTACT
Email: sciker.singapore@gmail.com
We aim to respond within 2 business days.
FREQUENTLY ASKED QUESTIONS
My heart rate isn't showing up.
- If you're using a Bluetooth chest strap: make sure it's powered on and worn snugly, then open the heart rate sheet (tap the heart icon on the home screen) and tap "Scan again."
- If you're using an Apple Watch: make sure it's unlocked, paired, and that Health access is turned on for this app under Settings → Privacy & Security → Health. Without the watch companion app installed, readings sync from Apple Health every few minutes rather than live — install the companion app on your watch for a continuously live reading.
Can I build my own interval workout?
Yes. Tap "Custom" on the home screen, then set your own warm-up, work interval, recovery interval, rounds, and cool-down. Saved custom workouts appear alongside the built-in protocols.
Does my workout history sync anywhere?
Workout history is stored locally on your device. If you've enabled Apple Health access, completed workouts are also written to Apple Health, so they'll appear there and on any other device connected to the same Apple Health account via iCloud.
How do I change the language or appearance?
Tap the globe icon on the home screen to change the app's language, or the contrast icon to switch between light, dark, and system appearance.
I found a bug or have a feature request.
Email us at the address above with as much detail as you can — what you were doing, what you expected, and what happened instead. Screenshots help a lot.
Do you sell or share my data?
No. See our Privacy Policy for full details on what data the app uses and why.
VO2 Max Intervals
