RepStack: Gym Workout Tracker

Strength Log & AI Coach

Only for iPhone

Free · In‑App Purchases · Designed for iPhone

iPhone

RepStack tells you exactly what weight and reps to hit next session. No guessing. No spreadsheets. Just show up and lift. SMART PROGRESSIVE OVERLOAD A built-in rule engine runs instantly on your phone — no internet needed. It tracks your rep ranges, bumps your weight when you're ready, and deloads when you need it. When you're online, AI coaching gives you per-exercise tips based on your history. STRENGTH SCORE (0-999) Know exactly where you stand. RepStack scores your strength across 5 compound lifts — Bench, Squat, Deadlift, OHP, and Row — rated from Beginner to Elite. Watch your number climb every week. IMPORT ANY PROGRAM Paste a program description or upload an Excel spreadsheet (.xlsx). AI parses it into a structured training plan in seconds — multi-week periodization, RIR, deload weeks, intensity techniques. No manual entry. No other app does this. WHAT-IF PROJECTIONS See when you'll hit your next milestone. 200kg deadlift? 2x bodyweight squat? RepStack uses a research-backed model to project your progress and give you an ETA. WORKOUT REWIND Compare your strength across 30 days, 90 days, or a full year. See exactly how much your e1RM has changed on every exercise. 873 EXERCISES WITH IMAGES Two images per exercise showing start and end position. Searchable by name and muscle group. No internet required. 5 BUILT-IN PROGRAMS Push Pull Legs, Upper Lower, Full Body, Bro Split, and 5/3/1 Boring But Big — ready to go on day one. SET TYPES & REST TIMER Working, Warmup, AMRAP, Drop Sets, and Failure sets — all color-coded. Floating rest timer with haptic feedback counts you down between sets. 4 TYPES OF PERSONAL RECORDS e1RM, Max Weight, Max Reps, and Max Volume — automatically detected after every workout. WORKS COMPLETELY OFFLINE SQLite on your device. No account required. No loading screens. No cloud dependency. Your data stays on your phone. SYNCS ACROSS DEVICES iCloud sync keeps your workouts, programs, and records in sync across all your Apple devices. REPSTACK PRO INCLUDES - AI coaching with progressive overload recommendations - AI program import (text + spreadsheet) - Strength Score (0-999) - What-If projections with milestone ETAs - Workout Rewind (30d / 90d / 1yr) - Exercise trends with sparkline charts - Unlimited workout history - Unlimited active programs - Live Activity & Dynamic Island - Workout templates - Exercise cues - iCloud sync FREE FEATURES - Unlimited workout logging - 873 exercises with images - 5 built-in program templates - Rest timer with haptics - 30-day history - Volume fun facts - Education hub PRICING - Monthly: $6.99/mo - Annual: $39.99/yr (best value — that's $3.33/mo) - Lifetime: $119.99 Less than a coffee per week for the smartest gym app you'll ever use. Terms of Use: https://rep-stack.com/terms Privacy Policy: https://rep-stack.com/privacy

Ratings & Reviews

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- Redesigned onboarding — pick your experience level and get started faster - Improved home screen with workout stats and strength teaser - Layout and spacing fixes throughout the app - Performance and stability improvements

Version 1.0.1

The developer, Alex Tirim, 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:

    • Identifiers
    • Usage Data

Privacy practices may vary, for example, based 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

  • Seller
    • Alex Tirim
  • Size
    • 158.3 MB
  • Category
    • Health & Fitness
  • Compatibility
    Requires iOS 15.1 or later.
    • iPhone
      Requires iOS 15.1 or later.
    • iPod touch
      Requires iOS 15.1 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.
  • Languages
    • English
  • Age Rating
    9+
  • In-App Purchases
    Yes
    • Repstack Pro Yearly $39.99
    • Repstack Pro Monthly $6.99
    • Repstack Pro Lifetime $119.99
    • Learn More
  • Copyright
    • © 2026 Tirim Alexandru
  • Developer Website
  • Privacy Policy

    • More by Alex Tirim