Callibri Biofeedback vs Serene Form
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Callibri Biofeedback
This system uses a sensor to measure muscle tone and visualizes your muscle activity in a game-like interface. It's designed for self-regulation training to improve muscle strength and bodily functions.
- Muscle tone evaluation (EMG signal)
- Visualizes muscle activity in games
- Muscle restoration for stroke/CP
- Home fitness muscle strengthening
- Increases physiological reserves
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The "Callibri Biofeedback" system is designed for self-regulation training sets prepared by specialists with a goal of being able to manipulate the body's systems at will. The application works with "Callibri" sensor that instantly evaluates muscle tone level (the EMG signal) and the app visualizes muscle activity in the form of a game situation. The Callibri Biofeedback system is used for: • restoration of weakened muscles in stroke and cerebral palsy; • training, increasing the strength and functionality of muscles in the field of home fitness; • increasing and maintaining the physiological reserves of the body.
Serene Form
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he application "Serene FORM" is designed to overcome the effects of stress. The application works in conjunction with an electronic device that registers physiological parameters from the user's body that objectively reflect his psycho-emotional arousal in real time. The training procedure is not associated with conscious or volitional efforts and occurs through a method known in science as operant conditioning (B.F. Skinner). In practice, the training procedure consists in watching a movie that the user chooses himself. At the same time, the screen with the film periodically turns on and off synchronously with changes in the user's psycho-emotional arousal. This kind of reward and punishment allows the brain to select its internal states and restructure its own work in order to resist the negative effects of stress on the body. 30 sessions of 20 minutes are required each to achieve a reliable result, which will be confirmed by independent testing. To control the result of the training, the application has a built-in test for assessing situational anxiety.
Screenshots
Verdict
The clearest difference is device support: Serene Form at 3 against Callibri Biofeedback's 1. 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.
Callibri Biofeedback ships an update every 4 months, Serene Form every 6 months. Both last shipped on November 3, 2026.
| Parameter | Callibri Biofeedback | Serene Form |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 4 months — better | Every 6 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15 — better |
| Further details — not scored | ||
| Size | 269 MB | 119 MB |
| Age rating | 12+ | 4+ |
| Developer | BRAINBIT INC. | Advanced Yoga Therapy, Inc |
In-app purchases
Callibri Biofeedback
No in-app purchases
Serene Form
No in-app purchases
Questions
Is Callibri Biofeedback free?
Is Serene Form free?
Do Callibri Biofeedback or Serene Form have ads?
Which is updated more often, Callibri Biofeedback or Serene Form?
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