Klyft: AI Health & Recovery
Workout, Nutrition & Sleep
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
NEW — Biological Age and biomarker tracking. Upload your lab reports, see how fast you're ageing, and train the number down.
Klyft is the operating system for your body.
Most apps track one thing. Klyft connects everything — sleep, recovery, training load, nutrition, and now your biomarkers — into one intelligent system that adapts to your body every single day.
ONE SCORE. EVERY MORNING.
Your wearable collects thousands of data points overnight. Klyft turns them into one number you can actually use: the Arc Score. Three pillars. One decision.
Recovery — sleep quality, HRV, daily readiness
Nutrition — calories, protein, macros, glycaemic load
Fitness — training load, VO₂ Max, acute-to-chronic ratio
KNOW YOUR BIOLOGICAL AGE
Your birth certificate holds one number. Your biology holds another. Klyft estimates your Biological Age from your biomarkers, recovery, and fitness data — then shows you how fast you're ageing and what actually moves the needle. Train it down. Watch it change. Ageing just became a metric.
YOUR LAB REPORTS, DECODED
Upload any lab report — photo or PDF. Klyft extracts your biomarkers, explains each one in plain language, and tracks how every marker moves over time. Then it connects the dots: your labs add context to your training, your nutrition, your daily plan. Blood tests stop being paperwork. They become part of the picture.
WORKOUTS THAT ADAPT TO YOUR RECOVERY
Klyft doesn't hand you a static programme. It reads last night's sleep, checks your recovery, and builds today's session around what your body can actually handle. Every workout adapts. Every day.
SNAP A PHOTO. NUTRITION LOGGED.
Point your camera at any meal. Klyft reads the calories, protein, and macros in seconds — then folds it into your training plan. Your nutrition and your workouts finally talk to each other.
AI COACH. POWERED BY YOUR DATA.
Ask Klyft anything. "Should I train today?" "Why is my HRV down?" "What should I eat to recover faster?" Every answer is grounded in your real data — HRV, sleep, training load, biomarkers — not generic advice.
WORKS WITH YOUR WEARABLES
Apple Watch, Garmin, Oura, WHOOP, Fitbit, Polar, Coros, Suunto, Wahoo, Withings, and continuous glucose monitors including Dexcom and Abbott Libre. Bring the device you already own.
GROUNDED IN SCIENCE
Every calculation is built from 800+ peer-reviewed studies. Your Biological Age is built on the Hallmarks of Aging framework. Your Arc Score is a formula you can audit — transparent, documented, and evolving with your body.
WHO KLYFT IS FOR
Athletes who want their data to do more than sit on a dashboard
Longevity-focused people who want to know their Biological Age — and lower it
High performers managing training, recovery, nutrition, and labs across too many apps
Anyone who checks their HRV before they check their email
Start your free trial and see what your body has been trying to tell you.
Klyft is a wellness and fitness product, not a medical device. It doesn't diagnose, treat, or prevent any condition — for anything medical, talk to your doctor.
Your biggest update yet.
BIOLOGICAL AGE
Your biology holds a different number to your birth certificate. Klyft now estimates it — from your biomarkers, recovery, and fitness data — and shows you how to train it down.
LAB REPORTS
Upload any lab report. Klyft extracts your biomarkers, explains each one in plain language, and tracks every marker over time.
BIOMARKERS, CONNECTED
Your labs now add context to your daily plan — training, nutrition, recovery. Blood tests stop being paperwork. They become part of the picture.
The developer, Klyft, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
Data Linked to You
The following data may be collected and linked to your identity:
- Health & Fitness
- Purchases
- Location
- Contact Info
- User Content
- Identifiers
- Usage Data
- Diagnostics
- Other Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Klyft Technologies UK Ltd
- Size
- 79.6 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPad
Requires iPadOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
16+
- 16+
- Frequent
Medical Treatment information
Contains
Health or Wellness Topics
- In-App Purchases
Yes
- Klyft Pro Monthly $9.99
- Klyft Annual $99.99
- Copyright
- © 2026 Klyft Technologies UK Ltd