FairHammer vs DFree Personal
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FairHammer
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The Fairhammer App is used in conjunction with GroovTube breathing exerciser hardware, as an aid to breathing exercises. The GroovTube hardware unit is essentially a MIDI device which has been developed to output MIDI as a function of the User's breathing/airflow. The Fairhammer App detects breathing strength, speed and duration and uses these parameters to move "mercury" toward the top of a thermometer-style graphic. Users may sign in and use the App regularly, and the App can be used to show all historical User/Session data, providing a useful tool for therapists to monitor progress.
DFree Personal
This application connects to a wearable sensor to monitor bladder fullness using ultrasound. It provides timely notifications to help users manage incontinence and plan bathroom visits.
- Bladder fullness detection
- Ultrasound sensor integration
- Bathroom visit notifications
- Incontinence management support
- Wearable sensor data reference
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This app is used for referencing the data from a wearable sensor called "DFree" that supports incontinence care. DFree uses ultrasound to detect the expansion and contraction of the bladder and informs you of when to go to the bathroom via app.
Screenshots
Verdict
The clearest difference is update cadence: DFree Personal at every 4 weeks against FairHammer's every 4 months. DFree Personal also leads on device support (3 vs 1). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
FairHammer ships an update every 4 months, DFree Personal every 4 weeks. The most recent releases landed on October 5, 2026 and October 20, 2026 respectively.
| Parameter | FairHammer | DFree Personal |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 4 months | Every 4 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 12 MB | 44 MB |
| Age rating | 4+ | 4+ |
| Developer | Ruud van der Wel | Triple W |
In-app purchases
FairHammer
No in-app purchases
DFree Personal
No in-app purchases
