Comparison

PSiO vs Cap Zen

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

Head to head
About

PSiO

Features
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This application presents the advantages of the PSIO device in the shape of a pair of glasses combining light & relaxation. This device is revolutionary because it offers for the first time a real support for the mind to be in full shape all year. Sessions are available for morning, afternoon and evening. The app is designed for PSIO ambassadors as it allows them to present the benefits of the PSiO effectively in order to bring their prospects to test the device quickly. It is possible to make an appointment immediately with an ambassador. The app also gives the opportunity to test the level of alertness before and after a PSIO session. Indeed, a section proposes a reaction time test.

About

Cap Zen

Features
Read full description

CAP ZEN is a relaxation application validated by 35 years of clinical relaxation research. Around a hundred hospitals use these titles for both staff and patients. Several types of relaxation sessions are available: 1. A wide variety of relaxing music mixed with nature sounds (Biosphere). 2. Meditation sessions designed for apprentice meditators, to be practiced while awake in the morning. 3. Relaxation sessions ("Audiocament" brand) to soothe functional disorders (Ericksonian suggestion). Various themes : Stress management, Sleep, Depressive states, Functional disorders, Weight management, Addictions, Sport, Relaxation for children. Terms of use: https://www.cap-zen.net/en/terms-of-use

Screenshots

PSiO4 screens
Cap Zen4 screens

Verdict

The call

The clearest difference is in-app purchases: PSiO at none against Cap Zen's 1. PSiO also leads on iOS requirement (9.0 vs 16.4). Cap Zen's advantage is update cadence (every 4 months vs every 11 months). On price, ads and device support 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. Cap Zen sells 1 in-app purchase, starting at $34.99 per 6 months. PSiO asks for nothing beyond the download.

UpkeepUpdate frequency

PSiO ships an update every 11 months, Cap Zen every 4 months. The most recent releases landed on September 16, 2026 and September 23, 2026 respectively.

Scorecard3 real differences ยท 3 level
PSiO versus Cap Zen: the parameters behind the verdict, then further details
ParameterPSiOCap Zen
PriceFreeFree
Update frequencyEvery 11 monthsEvery 4 months โ€” better
AdsNoNo
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPad, iPod โ€” betteriPhone, iPad
Requires iOS9.0 โ€” better16.4
Further details โ€” not scored
Size25 MB68 MB
Age rating4+12+
DeveloperPsychomed.com SACAP ZEN International SRL

In-app purchases

None

PSiO

No in-app purchases

1 purchases

Cap Zen

Subscriptions1
  • Subscription$34.996 Months

Questions

Is PSiO free?
PSiO is free to download, with no in-app purchases.
Is Cap Zen free?
Cap Zen is free to download, with in-app purchases available.
Do PSiO or Cap Zen have ads?
Neither PSiO nor Cap Zen shows ads.
Which is updated more often, PSiO or Cap Zen?
PSiO ships an update every 11 months, and Cap Zen every 4 months. Most recently, PSiO was updated on September 16, 2026 and Cap Zen on September 23, 2026.

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