Comparison

Cenli vs Sleep Diary by Psyktest

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

Head to head
About

Cenli

Features
Read full description

Cenli® is a biofeedback kit that helps you train to calm your nervous system. Cenli consists of wireless sensors that measure heart rate variability, temperature, and muscle tension, and an app that visualises the measurements and guides you through a 10-minute daily biofeedback session. How is Cenli used? Use Cenli for 10 minutes daily to complete a biofeedback session. The app shows step-by-step instructions and provides learning about biofeedback and the sensor measurements. After each session, you receive statistics and a score. Cenli includes a user manual that guides you through how to use the product. Privacy All data is handled securely and in accordance with GDPR. Terms of Service: https://cenli.no/policies/terms-of-service Privacy Policy: https://cenli.no/policies/privacy-policy Important Information Cenli is not medical equipment and is not intended for diagnosing or treating medical conditions. The app is developed and operated by Cenli AS, a subsidiary of Nordic Brain Tech AS.

About

Sleep Diary by Psyktest

Features
Read full description

Sleep better, live better with Sleep Diary - your personal sleep tracking companion. Developed by a general practitioner with extensive clinical experience. Track your sleep patterns, monitor your sleep quality, and gain insights into your nightly rest. Sleep Diary helps you understand your sleep habits and improve your overall well-being through evidence-based techniques. Features: • Daily sleep logging with intuitive interface • Sleep efficiency calculations and trends • Sleep restriction therapy support • Beautiful dark design that's easy on the eyes • Secure local data storage with encryption • Detailed sleep statistics and analytics • Export your sleep data • Norwegian and English language support Developed by a licensed general practitioner with extensive experience in sleep medicine. Important: This app is for informational purposes only and does not replace professional medical advice, diagnosis, or treatment. Always consult with your healthcare provider regarding sleep disorders or health concerns. Privacy: All data is stored securely on your device. We do not collect or share any personal health information.

Screenshots

Cenli4 screens
Sleep Diary by Psyktest4 screens

Verdict

The call

Cenli and Sleep Diary by Psyktest are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 5, 2026 and October 10, 2026 respectively.

ScorecardNo meaningful differences
Cenli versus Sleep Diary by Psyktest: the parameters behind the verdict, then further details
ParameterCenliSleep Diary by Psyktest
PriceFreeFree
Update frequencyEvery 3 weeksEvery 3 weeks
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, iPod
Requires iOS15.115.1
Further details — not scored
Size61 MB56 MB
Age rating17+17+
DeveloperNordic Brain TechLavamilk AS

In-app purchases

None

Cenli

No in-app purchases

None

Sleep Diary by Psyktest

No in-app purchases

Questions

Is Cenli free?
Cenli is free to download, with no in-app purchases.
Is Sleep Diary by Psyktest free?
Sleep Diary by Psyktest is free to download, with no in-app purchases.
Do Cenli or Sleep Diary by Psyktest have ads?
Neither Cenli nor Sleep Diary by Psyktest shows ads.
Which is updated more often, Cenli or Sleep Diary by Psyktest?
Cenli ships an update every 3 weeks, and Sleep Diary by Psyktest every 3 weeks. Most recently, Cenli was updated on October 5, 2026 and Sleep Diary by Psyktest on October 10, 2026.

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