Comparison

Callibri BeFit vs Serene Form

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

Callibri BeFit

Features
Read full description

Callibri BeFit - the most simple and effective simulator for female "intimate" muscles trainings, without leaving home. Callibri BeFit is based on Biofeedback method and allows you to see how the pelvic floor muscles work in real time and learn to control and train them without pain or discomfort. The application has a number of special techniques developed by leading obstetricians, gynecologists, urologists, proctologists, urogynecologists and sexopathologists. Just choose the one that suits you and start your workout! Training with Callibri BeFit will help not only increase the tone of the vaginal muscles, relieve pelvic and menstrual pain, but also improve the quality of sexual life, increase sensitivity, receive new sexual sensations from a brighter and deeper orgasm / multi-orgasm. Regular exercises will prepare the pelvic floor muscles for childbirth and maintain the physiologically correct position of the reproductive organs.

About

Serene Form

Features
Read full description

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

Callibri BeFit4 screens
Serene Form4 screens

Verdict

The call

The clearest difference is update cadence: Callibri BeFit at every 3 months against Serene Form's every 6 months. Serene Form's advantage is device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Callibri BeFit ships an update every 3 months, Serene Form every 6 months. The most recent releases landed on October 27, 2026 and October 11, 2026 respectively.

Scorecard2 real differences ยท 4 level
Callibri BeFit versus Serene Form: the parameters behind the verdict, then further details
ParameterCallibri BeFitSerene Form
PriceFreeFree
Update frequencyEvery 3 months โ€” betterEvery 6 months
AdsNoNo
In-app purchasesNoNo
DevicesiPhoneiPhone, iPad, iPod โ€” better
Requires iOS16.015 โ€” better
Further details โ€” not scored
Size247 MB119 MB
Age rating17+4+
DeveloperBRAINBIT INC.Advanced Yoga Therapy, Inc

In-app purchases

None

Callibri BeFit

No in-app purchases

None

Serene Form

No in-app purchases

Questions

Is Callibri BeFit free?
Callibri BeFit is free to download, with no in-app purchases.
Is Serene Form free?
Serene Form is free to download, with no in-app purchases.
Do Callibri BeFit or Serene Form have ads?
Neither Callibri BeFit nor Serene Form shows ads.
Which is updated more often, Callibri BeFit or Serene Form?
Callibri BeFit ships an update every 3 months, and Serene Form every 6 months. Most recently, Callibri BeFit was updated on October 27, 2026 and Serene Form on October 11, 2026.

Other comparisons