Rep Max Calculator vs 1RM Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Rep Max Calculator
Calculate your maximum weight for a specific number of repetitions. Ideal for powerlifting, bodybuilding, and fitness enthusiasts, it supports calculations for 1 to 40 repetitions based on the weight lifted.
- Calculate 1-rep max
- Supports 1-40 repetitions
- Weight-based calculation
- Powerlifting, bodybuilding, fitness
- User-friendly interface
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Repeated maximum calculator. Repeated maximum (RM) is the maximum weight that can be lifted to a certain number of times. Calculation from 1 to 40 numbers of repeates by specified weight for powerlifting, bodybuilding and fitness.
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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Estimate your one rep max (1RM) from any set. Enter the weight and reps you lifted, add RPE if you track it, and get your estimated max in seconds. FEATURES - 1RM calculator with optional RPE: reps left in the tank are counted, so 10 reps at RPE 7 is treated like a 13-rep max - Transparent formulas: your estimate is the average of Epley, Brzycki (up to 12 reps), Wathan, and Mayhew - Estimated rep maxes from 2 to 12 reps, each shown as a percentage of your 1RM, for planning working sets - Save results to your history by exercise, including your own custom exercises - Edit or backdate saved records - Export your history as CSV - kg or lbs, light or dark theme - 9 languages - No account needed: your records stay on your device PRO - 1RM progress chart for each exercise - Rep max table with your best recorded set for each rep count - No ads Pro is available as a monthly or yearly subscription, or as a one-time lifetime purchase. Subscriptions renew automatically until canceled in your store account settings. Your 1RM is an estimate, not a tested max. Estimates are most reliable at lower reps. Terms: https://1rm.workoutwise.app/legal/terms/ Privacy Policy: https://1rm.workoutwise.app/legal/privacy-policy/
Screenshots
Verdict
The clearest difference is ratings volume: 1RM Calculator at 126 against Rep Max Calculator's 3. 1RM Calculator also leads on review sentiment (100% vs 80%). Rep Max Calculator's advantage is iOS requirement (10.0 vs 15.0). On price, rating, update cadence and ads 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. Rep Max Calculator sells 3 in-app purchases, starting at $9.99 per month and 1RM Calculator sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.
Rep Max Calculator holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: 1RM Calculator has 126 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 80% of Rep Max Calculator's written reviews are positive against 100% of 1RM Calculator's, so the app with the better star average is not the one people write more warmly about.
Rep Max Calculator ships an update every 7 months, 1RM Calculator every 4 months. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.
| Parameter | Rep Max Calculator | 1RM Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) — better | 4.8 (126 ratings) |
| Positive reviews | 80.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 3 | 126 — better |
| Update frequency | Every 7 months | Every 4 months — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 28 MB | 28 MB |
| Age rating | 4+ | 4+ |
| Developer | Roman Shimchenko | Yuri Koshiishi |
Customer experience
Rep Max Calculator
1RM Calculator
In-app purchases
Rep Max Calculator
- Monthly subscription$9.991 Month
- Subscription for year$99.991 Year
- Save Settings$1.99
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
Questions
Is Rep Max Calculator free?
Is 1RM Calculator free?
Which has better reviews, Rep Max Calculator or 1RM Calculator?
Do Rep Max Calculator or 1RM Calculator have ads?
Which is updated more often, Rep Max Calculator or 1RM Calculator?
Other comparisons
