Weight Tracker - Lean is law
Bulk & Cut, Gym Progress Pics
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Weight tracker for muscle gain: plan bulk, cut, diet break and prep on one timeline. Your trend instead of scale noise, with Pro plus TDEE, macros and peak week.
The weight tracker for the gym: run your lean bulk and cut by your trend, not by the noise on the scale.
Want to gain weight and build muscle without adding more fat than you need, or keep your muscle while cutting? Lean is law smooths your daily weigh-ins into a trend weight and shows whether your bulk or cut is running at the right pace.
Plan phases with a pace: Bulk, Cut, Maintain and Diet Break, each with a weekly rate in percent of your body weight.
TREND INSTEAD OF SCALE NOISE
• Trend weight, weekly rate and 7-day change instead of daily swings from water, salt and meals
• History with chart, daily values and phase bands
PHASES WITH A PACE
• Bulk, Cut, Maintain and Diet Break, planned as a whole season on a timeline: change a length and every following phase moves along
• Pace in percent of body weight per week, with a warning when a bulk runs faster than 0.5 % or a cut faster than 1.0 % per week
• Maintain and Diet Break with a corridor around your weight
• Optional end date and target weight for every phase
PREP, PEAK WEEK AND TRAINING DAYS (PRO)
• Target curve in the chart: where your weight should go across all planned phases, right next to your trend
• Prep with a fixed competition date and a daily plan for peak week, as a template without water or sodium manipulation
• More calories on training days, fewer on rest days, with the same weekly budget
CALORIES AND MACROS
• Log calories, protein, carbs and fat in seconds, with your recent entries at hand
• Read them from Apple Health and write your own entries back if you like
• Adaptive TDEE (Pro): your average intake of the last 14 days, corrected by what your trend did
• Target calories and macro targets for your phase (Pro), protein adjustable from 1.6 to 2.4 g per kg
HONEST NOTE: NO FOOD DATABASE
Lean is law has no food database and no barcode scanner. Take your calories and macros from Apple Health, for example from the food tracker you already use, or enter them yourself in a few seconds.
PROGRESS PICS, CHECK-IN AND SUPPLEMENTS
• Weekly check-in with posing photos: front, back, side and lat spread, plus weekly average, rate, waist and a note
• See your gym progress in a before and after comparison of your poses (Pro)
• Body measurements with body fat percentage and waist from Apple Health (Pro)
• Supplement reminders, for example for creatine, with a "Taken" action and a daily check-off
• Progress photos stay on your device
YOUR DATA
No account and no ads. Your entries stay on your device. Export as CSV and JSON at any time and import CSV files from other apps. Widgets, dark mode and ten languages.
FREE AND PRO
Free: weight and trend, history, Apple Health, phases with pace warnings and season planning, logging calories and macros, supplements, the weekly check-in with posing photos, the small widget and export.
Lean is law Pro adds: adaptive TDEE, target calories and macro targets per phase, a forecast for the end of your phase, the target curve, Prep with peak week, training day calories, long chart ranges, pose comparison before and after, sharing your check-in as an image, milestones, patterns, balance, monthly reports, body measurements, experiment evaluation, corridor early warning, iCloud backup, large widgets and multiple reminders.
Lean is law Pro is available as a monthly subscription, a yearly subscription with a 7-day free trial, or a one-time purchase. Prices are shown in the app before you buy and may vary by country. Payment is charged to your Apple ID. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. You manage and cancel them in your Apple ID settings.
NOTE
Lean is law is not a medical device and gives no medical advice. TDEE, target calories and macros are estimates based on your own entries.
Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy policy: https://leanislaw.app/en/privacy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
New in version 1.2.0:
• Plan your season: several phases in a row on a timeline, everything after a change moves along automatically
• Target curve in the chart (Pro)
• Prep with a competition date and peak week (Pro)
• Training and rest day calories (Pro)
• Nutrition reminder at 8 pm and notifications about your phases
• Notifications arrive more reliably
The developer, Johannes Müller, 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 Linked to You
The following data may be collected but it is not linked to your identity:
- Health & Fitness
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Johannes Muller
- Size
- 83.7 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - iPad
Requires iPadOS 16.4 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 and 9 more
- English, Danish, Dutch, French, German, Italian, Norwegian Bokmål, Portuguese, Spanish, Swedish
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- In-App Purchases
Yes
- Lean is law Pro Lifetime $29.99
- Lean is law Pro Yearly $24.99
- Lean is law Pro Monthly $3.99
- Copyright
- © 2026 Johannes Müller