Lift Fuel AI
AI-Powered Fitness & Nutrition
Only for iPhone
Free · In-App Purchases
iPhone
Your macros, your reps, and the math between them.
LiftFuel AI intelligently integrates your training and nutrition into one unified system — built for lifters who are past the beginner phase and ready to train smarter.
Train with intelligence, not guesswork. LiftFuel AI analyzes your workouts, nutrition, sleep, and recovery to give you a daily readiness score so you always know if it's time to push hard or dial it back. The app tracks fatigue across every muscle group and automatically detects whether you're in a hypertrophy, strength, peaking, or deload phase — adjusting its recommendations accordingly.
Nutrition that adapts to your training. Log meals with a barcode scanner, search a massive food database with 6M+ foods, or build custom recipes and meal templates. Your protein and calorie targets aren't static — they shift based on your actual training volume, body weight trends, and goals. The app even correlates what you eat with how you perform, so you can see exactly how yesterday's nutrition affected today's session.
See what's actually working. LiftFuel AI connects the dots between your training and nutrition data to surface insights you'd never catch on your own. It flags anomalies in your weight, volume, and intake. It detects your PRs automatically. And every week you get a digest breaking down your progress compared to the week before.
Track everything that matters. Log body measurements, take progress photos tagged by pose, monitor your weight trends, and watch your strength curve over time. Widgets on your home screen keep your macros, readiness score, and streaks visible at a glance.
Built to keep you consistent. A training streak counter rewards you for showing up. HealthKit integration pulls in your steps, sleep, and weight automatically.
LiftFuel AI is a subscription app. Full access to every feature requires an auto-renewable LiftFuel AI Premium subscription.
WHAT'S INCLUDED WITH LIFTFUEL AI PREMIUM
AI readiness scoring based on sleep, nutrition, training load, and recovery
Per-muscle-group fatigue and recovery tracking
Automatic training phase detection (hypertrophy, strength, peaking, deload)
Adaptive protein and calorie targets
Performance-nutrition correlation analysis
Anomaly detection across weight, volume, and intake
Barcode scanner and food database with 6M+ foods, custom recipes, and meal templates
Set-by-set workout logging with RPE, rest timers, and PR detection
Unlimited workout templates
Progress photos, body measurements, and body fat estimation
Strength and volume trend charts
Weekly performance digests
Training streak counter and smart notifications
Home screen widgets
HealthKit integration
Full data import and export
SUBSCRIPTION DETAILS
LiftFuel AI Premium is an auto-renewable subscription, available in two options:
LiftFuel AI Premium Monthly — $4.49 USD, billed every 1 month after a 3-day free trial
LiftFuel AI Premium Yearly — $28.00 USD, billed every 1 year, includes 1 month free
Payment will be charged to your Apple ID account at confirmation of purchase (or at the end of the free trial). Subscriptions automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period at the same price. You can manage your subscriptions and turn off auto-renewal in your Apple ID Account Settings after purchase. Any unused portion of a free trial period is forfeited when you purchase a subscription.
Privacy Policy: https://liftfuelai.github.io/liftfuelai-support/privacy.html
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
Bug Fixes
The developer, JACK RYNTZ, 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:
- Purchases
- Identifiers
- Usage Data
Data Linked to You
The following data may be collected and linked to your identity:
- Purchases
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Health & Fitness
- Purchases
- Identifiers
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- JACK RYNTZ
- Size
- 25.2 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 26.2 or later.
- iPhone
Requires iOS 26.2 or later.
- iPhone
- Languages
- English
- Age Rating
16+
- 16+
- Contains
Advertising
User-Generated Content
Health or Wellness Topics
- In-App Purchases
Yes
- Lift Fuel Ai Monthly USD 4.99
- Lift Fuel AI Yearly USD 35.00
- Copyright
- © 2026 Jack Ryntz