HARD vs EFXLink
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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].
EFXLink
Control your Enfitnix bicycle taillights wirelessly via Bluetooth. Adjust brightness, alarm functions, and flashing modes. The app also allows for OTA updates and displays remaining battery power.
- Bluetooth taillight connection
- Alarm function on/off
- Brightness adjustment
- Brake sensing switch
- Automatic mode switch
- OTA firmware updates
- Battery power display
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● Search for your Enfitnix bicycle taillights through Bluetooth and connect them to wirelessly operate bicycle taillight related functions. ● Operation of the Home screen can turn on and off the alarm function for the tail lamp. ● The interface can adjust the brightness of the tail lights, brake sensing switch, automatic mode switch, alarm sound type, and flashing mode. ● The product can be upgraded to OTA in the air and factory settings can be restored. ● Can display the remaining power of the product. ● The original white theme is simple and beautiful.
Screenshots
Verdict
The clearest difference is rating: EFXLink at 5.0 against HARD's 3.0. HARD's advantage is ratings volume (6 vs 1) and iOS requirement (11.0 vs 15.0). On price, update cadence, 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.
EFXLink holds the better App Store score, 5.0 against 3.0. That said, the two scores are not equally well evidenced: HARD has 6 ratings behind it against 1, so its average is the more settled of the two.
HARD ships an update fortnightly, EFXLink every 3 weeks. The most recent releases landed on October 14, 2026 and September 23, 2026 respectively.
| Parameter | HARD | EFXLink |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (6 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 13.9% of reviews | — |
| Number of ratings | 6 — better | 1 |
| Update frequency | Fortnightly — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 11.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 181 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | Qianhai Walnut Technology Co.,Ltd | Dongguan Enfitnix Technology Co., Ltd. |
Customer experience
HARD
EFXLink
In-app purchases
HARD
No in-app purchases
EFXLink
No in-app purchases









