StackLab - Supplement Tracker

Vitamin Stack Log, A/B Tester

Free · In-App Purchases · Designed for iPad. Not verified for macOS.

Real A/B tests for your supplement stack. Apple Health imports workouts and sleep automatically. After each experiment, get a verdict, not an opinion. 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

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Verdicts now ship with a confidence score so you can tell a solid result from a hint. Import supplements by scanning the label. Track reminder adherence. Share verdicts.

Version 1.2

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.

    Privacy practices may vary based, for example, on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Size
    • 11.8 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.
    Languages
    • English
    Age Rating
    4+
    In-App Purchases
    Yes
    • Lifetime 499,99 zł
    • Monthly 29,99 zł
    • Yearly 229,99 zł
    • Learn More
    Provider
    BigBalli Consulting llc
    • BigBalli Consulting llc has identified itself as a trader for this app and confirmed that this product or service complies with European Union law.
    • DUNS Number
      118509986
    • Address
      89 Duncan St
      San Francisco California 94110
      United States
    • Phone Number
      +1 415-805-2445
    • Email
      appstore@BigBalli.com
    Copyright
    • © 2026, BigBalli Consulting
  • Privacy Policy

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