1RM Calculator vs One Rep
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
1RM Calculator
Easily calculate your one-rep max (1RM) strength with this app. It supports RPE input and allows you to estimate rep maxes based on your 1RM. Track your progress by saving your 1RM history for different exercises.
- 1RM calculation with RPE
- Rep max estimation
- Save 1RM history
- Customizable exercises
- Dark theme
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An easy-to-use 1RM calculation app that lets you use RPE and track your 1RM history. The core functionalities include: - 1RM calculation with RPE (optional). - Rep maxes estimation from 2 to 12 reps, according to your estimated 1RM. - Saving 1RM history by exercise. - Customized exercise selection. - Dark theme available. Terms & Conditions https://1rm-calculator.netlify.app/legal/terms/
One Rep
This minimal gym log app helps you track weightlifting and bodyweight exercises by logging sets and reps quickly. Create custom movements and group them into routines to easily monitor your progress over weeks or months.
- Custom movement creation
- Group movements into routines
- View workout history (weekly/monthly)
- Minimalistic UI for quick logging
- Track sets and reps
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One Rep is a minimal gym log app designed to make tracking your progress as easy as possible. Whether you’re lifting weights or doing bodyweight exercises, One Rep helps you log your sets and reps quickly, so you can focus on your workout and strive to do one more rep each time. Key Features: • Create and name your own movements. No pre-made templates or limitations—track exactly what you want. • Group movements into routines for seamless tracking. • View your workout history per week or month. • Minimalistic UI designed for quick and easy tracking, with minimal taps to log your progress. Coming soon - Easy to read charts that show how your reps and weights improve over time. At its core, One Rep is about keeping gym log tracking simple, allowing you to focus on doing more and progressing further without any distractions.
Screenshots
Verdict
The clearest difference is review sentiment: 1RM Calculator at 100% against One Rep's 45%. 1RM Calculator also leads on ads (none vs shown) and device support (3 vs 1). One Rep's advantage is in-app purchases (none vs 3) and update cadence (fortnightly vs every 4 months). On price there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. 1RM Calculator sells 3 in-app purchases, starting at $1.99 per month. One Rep asks for nothing beyond the download.
1RM Calculator ships an update every 4 months, One Rep fortnightly. The most recent releases landed on September 23, 2026 and September 9, 2026 respectively.
| Parameter | 1RM Calculator | One Rep |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (109 ratings) — better | — |
| Positive reviews | 100.0% of reviews — better | 45.5% of reviews |
| Number of ratings | 109 — better | — |
| Update frequency | Every 4 months | Fortnightly — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Ad-supported — better |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 32 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | Yuri Koshiishi | Dylan Ierugan |
Customer experience
1RM Calculator
One Rep
In-app purchases
1RM Calculator
- 1 Rep Max Pro Monthly$1.991 Month
- 1 Rep Max Pro Annual$9.991 Year
- 1 Rep Max Pro Lifetime$29.99
One Rep
No in-app purchases
