Kajo: HRV, Sleep & Cortisol
Recovery score & daily plan
Only for iPhone
$7.99 · Designed for iPhone. Not verified for macOS.
iPhone
Your watch shows HRV, sleep stages and resting heart rate. None of it tells you what to do today. Kajo turns those numbers into one plan — private, one-time purchase.
Your watch gives you data. Nobody tells you what it means.
Heart rate variability. Resting heart rate. Deep sleep versus REM. You look at the numbers, think "forty-two, okay", and carry on exactly as you would have anyway.
Kajo is a translator. It reads what is already in Apple Health and turns it into a plan for today.
YOUR OWN BASELINE, NOT AN AVERAGE
The Rhythm Score compares your HRV to your own 30-day baseline — not to a population average, not to an athlete. A number that looks fine for someone else can still mean you are strained. That is the only comparison that matters.
KNOW WHEN TO PUSH
Optimal means your nervous system has capacity today: train hard, take the difficult task. Strained means the opposite. That is not a failure, it is information — and acting on it is how you avoid burning out.
TIMING, NOT WILLPOWER
Based on when you woke and how you slept, Kajo suggests when to delay your first coffee, when to get light, and when to do demanding work. Small timing changes, done consistently.
WIND DOWN
Soundscapes and guided box breathing for the nights when you are in bed and your head is still at work.
PRIVATE BY DESIGN
Kajo reads directly from Apple Health. Nothing is stored on our servers, there is no account to create, and backups stay in your own iCloud.
One-time purchase. No subscription, no data collection.
Medical Disclaimer: Kajo is designed for general wellness and lifestyle purposes only. It is not a medical device and does not offer medical diagnoses or treatment. The Rhythm Score and recommendations are based on general physiological principles and your personal data patterns. Always consult a qualified healthcare professional before making significant changes to your health regimen or if you have concerns about your health.
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Under-the-hood performance improvements and bug fixes.
The developer, Uomagrit Oy, 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
- Uomagrit Oy
- Size
- 1.8 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 26.2 or later.
- iPhone
Requires iOS 26.2 or later. - Mac
Requires macOS 26.2 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.2 or later.
- iPhone
- Languages
- English
- Age Rating
13+
- 13+
- Infrequent
Medical Treatment information
Contains
Health or Wellness Topics
- Copyright
- © 2026 Uomagrit Oy
