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Zone Visualisation
See your training zones displayed beautifully and clearly. Know exactly where your effort sits — every session.
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Vivid Colour
Each zone in bold, distinctive colour. Know your zone at a glance — no squinting at numbers mid-workout.
⚡
Built for Athletes
Heart rate, power, or pace — Zonelight adapts to your metrics and your sport.
🔒
On-Device
No accounts required. Your training data stays on your device.
Step 01
Download & Open
Download from the App Store. No account or sign-in needed.
Step 02
Set Your Zones
Enter your training zone thresholds to match how you already train.
Step 03
Train & Glance
Your current zone shows in vivid colour. No maths — just your zone, instantly.
Step 04
Review Your Session
See a breakdown of time in each zone after training.
What metrics does Zonelight support? +
Heart rate, power, and pace-based zones. Check the app for the full list.
Does it need internet? +
No — works entirely on-device.
Is there a subscription? +
No account required. Check the App Store for pricing details.