ATMOS vs HARD
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ATMOS
Easily sync and manage your dive logs wirelessly from compatible dive computers. View device information, edit log details, and export your data in UDDF format. Integrates with HealthKit to share dive-related health metrics.
- Wireless dive log syncing
- Dive computer information
- Edit dive log details
- Export logs to UDDF
- HealthKit integration
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ATMOS App is the best companion of Mission One and Mission2, Mission3 dive computer. You can use ATMOS App to : ● Wirelessly sync your device's divelogs. ● Check device information. ● Edit divelog information. ● Export divelog to UDDF format. ATMOS use HealthKit to export your Mission2 health data (Steps, Calories, Sleep, Heart rate) into the Health app. Official website : https://www.atmos.app FaceBook fan page: https://www.facebook.com/atmosocean/ Follow us on Instagram : @atmos_ocean
HARD
This app syncs with smart devices to track daily activity like steps, distance, and calories. It also monitors heart rate, sleep patterns, and records exercise routes. Receive reminders for messages, alarms, and hydration.
- Activity tracking (steps, distance, calories)
- Exercise recording with GPS tracking
- Heart rate monitoring and analysis
- Sleep pattern analysis
- Message and reminder notifications
- HealthKit integration
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Recording activity: When you wear smart device to sync to APP, you can accurately record your steps, distance and calories burned, historical sleep statistics, and heart rate statistics for the day. Record exercise: When you are connected to the app after the smart device is turned on, you can accurately record the pace, time, distance and movement track of each historical exercise, and improve the effect of running and walking. Heart Rate Monitoring: Use smart device synchronization to analyze heart rate charts in your application. Includes a chart of historical heart rate data, a chart comparison of the maximum heart rate data for a week, and a 24-hour average data graph to see changes in your heart rate interval at any time. To manage stress and exercise effects. Sleep monitoring: Use smart devices to monitor the time of waking, light sleep and deep sleep every night. After synchronizing APP, you can count historical sleep data and analyze the comparison of sleep patterns over the past 7 days. Message reminder: When you wear the bracelet and sync with the app, you can choose to open the message push, alarm reminder, sedentary reminder, drink water reminder to the bracelet in the app. In order to achieve a regular life. **Precautions:** 1.The sports function uses GPS positioning.Running the GPS function continuously in the background may significantly reduce the battery power. 2.HARD has been connected to HealthKit, which can sync your step data, sleep data, and exercise data to [Health].
Screenshots
Verdict
The clearest difference is rating: HARD at 3.0 against ATMOS's 1.7. HARD also leads on update cadence (fortnightly vs every 6 weeks) and iOS requirement (11.0 vs 15.0). ATMOS's advantage is ratings volume (23 vs 6). On price, review sentiment, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
HARD holds the better App Store score, 3.0 against 1.7. Both are backed by a comparable volume of ratings — 23 and 6 respectively. Written reviews point the same way: 8% of ATMOS's written reviews are positive against 14% of HARD's.
ATMOS ships an update every 6 weeks, HARD fortnightly. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.
| Parameter | ATMOS | HARD |
|---|---|---|
| Price | Free | Free |
| Rating | 1.7 (23 ratings) | 3.0 (6 ratings) — better |
| Positive reviews | 7.7% of reviews | 13.9% of reviews — better |
| Number of ratings | 23 — better | 6 |
| Update frequency | Every 6 weeks | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 119 MB | 181 MB |
| Age rating | 4+ | 4+ |
| Developer | ATMOS CO., LTD. | Qianhai Walnut Technology Co.,Ltd |
Customer experience
ATMOS
HARD
In-app purchases
ATMOS
No in-app purchases
HARD
No in-app purchases









