StackLab - Supplement Tracker
Gym Log, Workout Experiment
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
NEW: Apple Health auto-imports workouts & sleep. Stop guessing which supplements work — test it on your own body.
Stop guessing which supplements actually work.
Run A/B tests on your own body.
Built for gym rats who want evidence.
You take five supplements. Maybe ten. You tweak your stack every time some influencer drops a video, and you still have no idea what's moving the
needle. StackLab fixes that. Pick an experiment, train normally, and after a couple weeks the app hands you a percentage difference and a verdict
instead of an opinion.
FEATURES
• Find out if creatine timing matters. The app alternates AM and PM days and tells you which one your body actually responds to.
• See whether pre-workout is worth forty bucks a tub. Pre-workout days against clean days, side by side, with a verdict at the end.
• Skip the manual workout log. Apple Health pulls in lifts, sleep, and resting heart rate the moment you finish a session.
• Rate a session in five seconds. Four taps cover strength, energy, pump, focus. Done.
• Get a clear answer. Each completed test ends with a verdict (positive effect, negative effect, or no clear difference) plus the percentage gap.
• Catch noise before it lies to you. Sleep under five hours flags the session, so a rough night doesn't poison your data.
• Watch the trend at a glance. A rolling seven-day Performance Score sits on the dashboard, so you see drift before you feel it.
• Run more tests when you're ready. Free includes one active experiment. Premium unlocks unlimited tests, a custom builder, and the
sleep-versus-performance correlation that separates lucky weeks from steady gains.
HOW IT WORKS
1. Log your stack. Pick a template (pre-workout, creatine timing, fasted vs fed) or build your own.
2. Train normally. The app handles the alternation. Apple Health handles the data.
3. Read the result. After enough sessions, StackLab tells you what worked.
PRIVACY
Your data stays on your phone. No cloud sync, no accounts, no analytics SDK, no ads. HealthKit access is read-only, so the app cannot write to your
health record.
Stop paying for opinions. Test your own stack.
Payment will be charged to your Apple ID at confirmation of purchase. Subscription automatically renews 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. You can
manage and cancel your subscriptions in your Account Settings on the App Store after purchase. Any unused portion of a free trial is forfeited when
purchasing a subscription.
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://BigBalli.com/privacy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Added:
- Apple Health (HealthKit) integration
The developer, BigBalli Consulting llc, 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
- BigBalli Consulting llc
- Size
- 11.5 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 18.6 or later.
- iPhone
Requires iOS 18.6 or later. - iPad
Requires iPadOS 18.6 or later. - Mac
Requires macOS 15.6 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.6 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Lifetime $99.99
- Monthly $6.99
- Yearly $49.99
- Copyright
- © 2026, BigBalli Consulting