Cenli vs Sleep Diary by Psyktest
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Cenli
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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.
Sleep Diary by Psyktest
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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
Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 5, 2026 and October 10, 2026 respectively.
| Parameter | Cenli | Sleep Diary by Psyktest |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.1 | 15.1 |
| Further details — not scored | ||
| Size | 61 MB | 56 MB |
| Age rating | 17+ | 17+ |
| Developer | Nordic Brain Tech | Lavamilk AS |
In-app purchases
Cenli
No in-app purchases
Sleep Diary by Psyktest
No in-app purchases
Questions
Is Cenli free?
Is Sleep Diary by Psyktest free?
Do Cenli or Sleep Diary by Psyktest have ads?
Which is updated more often, Cenli or Sleep Diary by Psyktest?
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