Testify - A/B testing tool

Perform everyday experiments

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

Testify lets you run real experiments on your everyday life. Wondering if keeping your windows closed keeps your house warm? Curious whether wearing socks affects your productivity? Maybe you want to see if your sports team plays better if it is raining? Stop guessing and start testing. Set up an experiment with a hypothesis, track your results day by day, and let Testify crunch the numbers. The app automatically picks the right statistical test for your data — Chi-Squared for yes/no outcomes, or a Two-Sample T-Test for measurements — and tells you in plain language whether your results are meaningful or if you need more data. Features: - Create experiments with a hypothesis and a variable to test - Record trials with date, time, results, and optional contextual notes - Automatic statistical analysis with Chi-Squared and Welch's T-Test - Optional Bayesian view showing the probability one variant is better, with a 95% credible interval - Sequential analysis with a Pocock boundary so repeated peeking doesn't inflate false positives - Visual charts comparing your control and treatment groups, with a best-fit trend line for numeric experiments - Confidence intervals so you can see the range of possible effects - Post-hoc statistical power analysis - Sample size estimates that tell you how much more data you need - Plain-English explanations of your results — no stats degree required - Share polished result images with friends or social media - Daily reminders to log your data, with deep links straight to the experiment - Edit experiments and trials at any time, conclude or reopen as your investigation evolves - Track multiple experiments at once with a last-viewed summary card - Home screen widget showing your most recent experiment and a one-tap Add Trial shortcut - First-launch walkthrough to get you started quickly - Light and dark mode support Testify Pro (optional subscription): - Unlimited experiments - CSV import and export for your trial data - Multi-page PDF report export with charts, summary, and trial table Whether you're optimizing your daily routine, identifying patterns, or just settling a debate with yourself, Testify gives you the statistical tools to find out what actually works.

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The developer, Rowena Ricalde, 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, for example, based on the features you use or your age. Learn More

    Accessibility

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    Information

    Seller
    • Rowena Ricalde
    Size
    • 4.1 MB
    Category
    • Utilities
    Compatibility
    Requires iOS 26.0 or later.
    • iPhone
      Requires iOS 26.0 or later.
    • iPad
      Requires iPadOS 26.0 or later.
    • Mac
      Requires macOS 26.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 26.0 or later.
    Languages
    • English
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    • © 2026 ganglion software (Rowena Ricalde)
  • Developer Website
  • Privacy Policy

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