Mewna - AI Sleep Companion
A cat curled by your pillow
$1.99 · Designed for iPad. Not verified for macOS.
Brand new. Cole-Kripke actigraphy + Apple Watch HR/HRV translates every restless night into gentle, plain-language insight. No sign-up, iCloud backup.
Sleep better, starting with understanding tonight.
Mewna is a tiny moon-cat who watches over you while you sleep. Place your iPhone by your pillow, or wear your Apple Watch — we'll quietly read your night and tell you what happened, in human words.
Not another cold sleep tracker. A companion who understands the science and speaks gently.
WHY MEWNA
• Academic algorithm, plain-language results
Cole-Kripke (1992) actigraphy — ~89% PSG agreement in adults. NIH / Sleep Foundation sleep-quality framework. The complex science, translated into what you actually need to know tonight.
• Multi-source fusion
Apple Watch heart rate, HRV, and sleep stages, plus iPhone micro-motion detection — combined, more accurate than either alone.
• Story-ready in the morning
Sleep score · total sleep · how long to fall asleep · times you woke up · deep recovery · REM · resting HR · HRV — and a personal narrative for the night, not just numbers.
• Calendar heatmap, trends visible
See at a glance which nights flowed and which were rough. 7 / 30 / 90-day trends help you find your rhythm again, slowly.
• Pre-sleep tags
A drink? A workout? Stressful day? A two-second tag lets the AI connect cause and effect for you.
• Auto iCloud backup, no sign-up
Your data is yours. All analysis happens on-device. Switch phones — your records follow.
PRIVACY FIRST
• No servers, no accounts, no ads, no trackers
• Motion + health data analyzed entirely on your iPhone
• iCloud sync uses Apple's private CloudKit container — even we cannot see it
• Erase everything anytime in Settings
18 LANGUAGES
繁體中文 · 简体中文 · English · 日本語 · 한국어 · Español · Français · Deutsch · Italiano · Português · Русский · Nederlands · Türkçe · العربية · हिन्दी · ภาษาไทย · Tiếng Việt · Bahasa Indonesia. Switch anytime in-app.
MADE FOR
• Anyone with restless or fluctuating sleep
• People who want to understand their body
• Apple Watch users who don't want yet another wearable
• Those who prefer warmth over cold dashboards
REFERENCES
Cole RJ et al., Sleep 1992;15:461-9 · Sadeh A et al., Sleep 1994;17:201-7 · Watson NF et al., Sleep 2015;38:843-4 · de Zambotti M et al., Sleep Med Clin 2020 · Hirshkowitz M et al., Sleep Health 2015.
Mewna is not a medical device. Persistent sleep problems? Talk to your doctor.
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Privacy Policy: https://gckenny.github.io/mewna/privacy.html
Terms of Use: https://gckenny.github.io/mewna/terms.html
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Kaijun Huang, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Kaijun Huang
- Size
- 6 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
English and 17 more
- English, Arabic, Dutch, French, German, Hindi, Indonesian, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish, Thai, Traditional Chinese, Turkish, Vietnamese
- Age Rating
4+
- 4+
- Copyright
- © 2026 Wuti Studio
