Calibre Biometrics vs Runflake
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calibre Biometrics
This app pairs with a wearable device to track and analyze key metabolic and performance metrics like VO2 Max and resting metabolic rate. It provides detailed insights into your body's energy expenditure and fat burning zones. Designed for informational and educational use, it complements professional health guidance.
- View biometric data
- Record metabolic information
- Analyze VO2 Max
- Monitor Resting Metabolic Rate
- Track FatMax and Calories
- Companion to wearable tracker
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The companion app to the Calibre™ wearable breath/metabolic tracker allows you to view, record and analyze the rich biometric information obtained by the Calibre device. A device with groundbreaking accuracy for measuring and monitoring VO2 Max, Resting Metabolic Rate, FatMax, Calories and more with a lightweight, portable device that is simple and easy to use. Disclaimer Calibre is intended for informational and educational purposes only and should not be used as a substitute for professional medical advice or devices.
Runflake
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Runflake is a running app that brings your runs together, from today’s pace to your weekly and monthly totals. Track a run, look back at your splits and see how your running changes over time. Your running, week by week See distance, time, run count and average pace by week, month, year or all time. Review the days you ran in a calendar and charts. Filter your run history by date and indoor or outdoor activity. Look closer at each run Review your outdoor GPS route and split pace. Find your longest runs and personal records over 1 km, 5 km and 10 km. Numbers you can read on the move Keep distance, time and pace in view. Turn on voice cues to hear your split every kilometre, or every mile when using miles. Voice cues are in English. A weekly goal that fits Six ways to aim: distance, runs per week, time, weight, calories, or steps. Follow your progress alongside your recorded runs. A week of running with your crew Join a crew with an invite code. See weekly distance and run counts based on the records shared with you. Add a manual entry for a week you did not record in the app. Choose separately whether to share your runs and include your totals in a crew report shared outside the group. Indoor runs, too Record indoor runs alongside outdoor sessions. Indoor distance is estimated from sensors and kept distinct from outdoor GPS records. Saved on your phone Record runs without an internet connection. Outdoor route tracking still needs location permission and GPS reception. Turn it on in settings and a finished run is written to Apple Health, with its route for outdoor runs. Start a run on Apple Watch and check your running numbers on your wrist. As you keep running, review your achievements and ranks. Daily, weekly, monthly and yearly leaderboards cover outdoor GPS runs.
Screenshots
Verdict
The clearest difference is in-app purchases: Runflake at none against Calibre Biometrics's 1. Runflake also leads on update cadence (every 3 days vs every 4 weeks). On price, ads, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Calibre Biometrics sells 1 in-app purchase, starting at $7.99 per month. Runflake asks for nothing beyond the download.
Calibre Biometrics ships an update every 4 weeks, Runflake every 3 days. Both last shipped on October 24, 2026.
| Parameter | Calibre Biometrics | Runflake |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (2 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 4 weeks | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, Apple Watch |
| Requires iOS | 15.4 — better | 16.4 |
| Further details — not scored | ||
| Size | 116 MB | 72 MB |
| Age rating | 4+ | 4+ |
| Developer | BreathTaking Tech LLC | WorkNPLAY Inc. |
In-app purchases
Calibre Biometrics
- Calibre Premium$7.991 Month
Runflake
No in-app purchases









