HRZones: Karvonen HR Zones
Android app by 26 Branding Agency Inc.. Health & Fitness · 26 Branding Agency Inc.
- Store rating
- Unknown
- Store rating count
- Unknown
- Download price
- 2.99 USD
- In-app purchases
- Not listed in captured metadata
- Version
- 1.0.0
- Listing last refreshed
- 2026-09-15
View the original store listing
Store description excerpt
HRZones turns your age and resting heart rate into the five training zones you can use to pace your workouts. Enter your age and resting heart rate, then choose your sport: running, cycling, swimming, or a generic option. The app estimates your maximum heart rate using a sport-specific Tanaka formula, or the classic 220 minus age when you pick the generic option, and shows it in beats per minute at the top of the screen. From your maximum and resting heart rate, HRZones applies the Karvonen heart rate reserve method to give you five zones: Recovery, Endurance, Tempo, Threshold, and VO2 Max. Each zone is shown as a clear low to high bpm range, so you know the heart rate to aim for in each effort level. Change your age, resting heart rate, or sport and the zones update instantly, so it is easy to compare estimates or recalculate as your fitness changes. The app works fully offline and does not collect any data. There are no accounts and no ads. HRZones is a one-time purchase with no subscriptions.
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