Sleep Data Recorder vs VO2Max Hiit Workout
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sleep Data Recorder
Effortlessly track your sleep patterns and daily body weight by logging your bedtime and wake-up times. The app automatically calculates your time in bed and asleep, and syncs data with Apple's HealthKit for easy monitoring of your health progress.
- Sleep pattern monitoring
- Body weight logging
- Automatic time calculation
- HealthKit integration
- Simple one-button entry
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Sleep plays a vital role in your good health and well-being. Getting enough sleep can help protect your mental health, physical health and quality of life. Monitor your sleep pattern and progress with the HealthKit app on your iPhone. There's no need to remember or write down the time you went to bed or got up. With Sleep Recorder adding those data points to Apple's HealthKit is simple. Just tap the buttons and the app records the time you went to bed and got up and automatically calculates the time you were in bed and asleep. Record your daily body weight in HealthKit with Weight Recorder an easy to use selector and one button entry.
VO2Max Hiit Workout
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Science-based HIIT protocols to boost your VO2Max. Built by athletes, precise to the second. Increase your VO2Max with science-backed interval training protocols used by elite athletes. Proven protocols following the latest (or oldest) research papers Norwegian 4x4, Tabata, Wingate, and conventional HIIT workouts designed to maximize aerobic capacity. Built and used by athletes that seek to improve their performance (VO2Max or regular calisthenics). Timers accurate to the second—no 10-second delays that throw off your intervals like most apps. 18% less battery drain than competing apps. Train longer without worrying about your phone dying mid-workout. Fully Customizable (adjust any protocol or any workout) Adjust work/rest intervals, rounds, and intensity to match your fitness level and goals. What you'll find in this app : VO2Max, HIIT, various interval trainings, Norwegian 4x4, Conventional (60/60) Tabata (20/10), Wingate (30/240), aerobic fitness, endurance training, cardio workouts
Screenshots
Verdict
The clearest difference is in-app purchases: VO2Max Hiit Workout at none against Sleep Data Recorder's 1. VO2Max Hiit Workout also leads on update cadence (every 10 days vs every 6 weeks). Sleep Data Recorder's advantage is ads (none vs shown) and iOS requirement (9.0 vs 15.6). On price and device support 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. Sleep Data Recorder sells 1 one-off in-app purchase. VO2Max Hiit Workout asks for nothing beyond the download.
Sleep Data Recorder ships an update every 6 weeks, VO2Max Hiit Workout every 10 days. The most recent releases landed on June 9, 2026 and September 16, 2026 respectively.
| Parameter | Sleep Data Recorder | VO2Max Hiit Workout |
|---|---|---|
| Price | Free | Free |
| Rating | 2.5 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 6 weeks | Every 10 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 2 MB | 104 MB |
| Age rating | 4+ | 12+ |
| Developer | JOHN BURKE | Unscripted Engineering |
In-app purchases
Sleep Data Recorder
- Weight Recorder Full Access$0.99
VO2Max Hiit Workout
No in-app purchases
Questions
Is Sleep Data Recorder free?
Is VO2Max Hiit Workout free?
Do Sleep Data Recorder or VO2Max Hiit Workout have ads?
Which is updated more often, Sleep Data Recorder or VO2Max Hiit Workout?
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