1RM Calculator vs Efort
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/
Efort
This application is designed for powerlifting athletes to enhance their performance. It offers custom program creation, performance insights, and optional integration with coaches.
- Custom program creation
- Performance insights
- Optional coach integration
- 100% free
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Efort: Powerlifting Training Efort is built for powerlifting athletes aiming to optimize performance—whether you work with a coach on Efort Coach or craft your own program. It’s 100% free. Key Features • Custom Programs • Performance Insights • Optional Coach Integration Take your powerlifting to the next level—download Efort and train like the best! Contact Us • Instagram: https://www.instagram.com/efortapp • Email: info@efortcoach.com
Screenshots
Verdict
The clearest difference is in-app purchases: Efort at none against 1RM Calculator's 3. Efort also leads on update cadence (weekly vs every 4 months). 1RM Calculator's advantage is ratings volume (109 vs 15) and device support (3 vs 1). On price, rating, review sentiment 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. 1RM Calculator sells 3 in-app purchases, starting at $1.99 per month. Efort asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.9 for 1RM Calculator against 4.8 for Efort. That said, the two scores are not equally well evidenced: 1RM Calculator has 109 ratings behind it against 15, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.
1RM Calculator ships an update every 4 months, Efort weekly. The most recent releases landed on September 23, 2026 and September 19, 2026 respectively.
| Parameter | 1RM Calculator | Efort |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (109 ratings) — better | 4.8 (15 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 109 — better | 15 |
| Update frequency | Every 4 months | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 32 MB | 70 MB |
| Age rating | 4+ | 4+ |
| Developer | Yuri Koshiishi | EFORT SYSTEMS S.L. |
Customer experience
1RM Calculator
Efort
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
Efort
No in-app purchases
