NoBand: Recovery & Readiness
HRV, strain & sleep tracker
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Your Apple Watch already collects everything needed to understand your body. NoBand turns that data into clear daily scores — Recovery, Readiness, Strain, and Sleep — with no extra wearable, no band, and no subscription. Pay once, yours forever.
RECOVERY (0–100)
Every morning NoBand compares last night's heart-rate variability, resting heart rate, breathing rate, and wrist temperature against your own 30-day baselines. You get one honest number, a calm Primed / Ready / Take it easy band, and the biggest factor that moved it — explained in plain English, never jargon.
READINESS (0–100)
Recovery asks how well your body rebounded overnight. Readiness asks the bigger question: all things considered — last night AND your two-week sleep balance, HRV trend, and training load — should you push today? Two rings, one honest answer, so “2 hours of sleep but great HRV” never reads as a green light.
STRAIN (0–21)
Your day's cardiovascular load, built from time in your personal heart-rate zones. The Strain Coach shows a live target range matched to today's recovery, so you know when to push and when to back off.
SLEEP
Hours versus your learned sleep need, sleep debt, stages, and a 0–100 consistency score. The Sleep Coach recommends tonight's bedtime for the morning you want.
BUILT ON REAL SPORT SCIENCE
No black box. Every score comes from published, peer-reviewed methods — and the app shows you the math:
• Recovery compares each morning against your own rolling 30-day baselines using robust statistics, so one weird night never skews your normal.
• Readiness weighs sleep debt using Borbély’s two-process sleep model and smooths trend inputs over 14 days, so it shifts calmly instead of overreacting.
• Strain uses the Banister TRIMP model — the training-load method used in sports science for decades — built from time in your personal heart-rate zones.
• Training load balance tracks your acute-to-chronic workload ratio, the same signal pro teams use to flag overtraining risk.
• Sleep consistency uses the Sleep Regularity Index — the only regularity metric validated against all-cause mortality (UK Biobank, 2024) — and your sleep need is learned from your own history, not a one-size-fits-all eight hours.
Tap any score to see exactly which input moved it and by how much — the full methods, weights, and sources are inside the app.
ALSO INCLUDED
• Health Monitor — five vitals tracked against your personal ranges
• Stress Monitor with a guided one-minute breathing exercise
• Daily Journal — see which habits actually move your recovery
• Weekly and monthly reports with warm, honest takeaways
• Trends — 7 / 30 / 90-day charts for every score
• Fitness Age with the top levers to improve it
• AI Coach — ask questions about your own numbers, included free
• Apple Watch app with complications and a morning recovery glance
• Silent alarm timed to your lightest sleep phase
• Optional, private cycle insights
PRIVATE BY DESIGN
Your health data is processed on your iPhone. No ads, no tracking, never sold. NoBand reads Apple Health with your permission and works with the watch you already own.
ONE-TIME PURCHASE
Your first week is free, then a single one-time unlock. No subscription, ever.
NoBand is a wellness product, not a medical device. Requires an Apple Watch (or another device that writes heart data to Apple Health).
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Improved recovery, readiness, sleep and activity calculations. Personal vital ranges now use measured nights and handle missing readings more accurately. Fixed calendar dates in diagnostic reports.
The developer, Konrad Sierzputowski, 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 Linked to You
The following data may be collected and linked to your identity:
- Health & Fitness
- Contact Info
- User Content
- Identifiers
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Konrad Sierzputowski
- Size
- 10.8 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later. - Apple Watch
Requires watchOS 11.0 or later.
- iPhone
- Languages
English and 12 more
- English, Dutch, French, German, Italian, Japanese, Korean, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Turkish
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- In-App Purchases
Yes
- NoBand Lifetime Unlock $9.99
- Copyright
- © 2026 Konrad Sierzputowski