1RM Calculator vs 1RM
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
1RM Calculator
Estimate your maximum weight lifted for a single repetition. Input your successful lifts and reps to gauge strength, compare progress, and plan future training. Offers advanced features for detailed tracking and analysis.
- Estimate 1-rep max
- Track lift history and progress
- Historical chart and list views
- Multiple estimation formulas
- Calculate multiple rep maxes
- Switch between lbs and kgs
- View percentages of 1-rep max
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1RM Calculator is a tool to help you determine your 1-rep max! Because of the nature and stress of attempting a 1-rep max, this utility allows you to enter in a weight you successfully lifted at the number of reps you performed in order to see what your estimated 1-rep max is. This not only helps give you an idea of the weight to attempt when actually performing a 1-rep max but also to gauge your strength and compare different rep schemes performed at different reps. If one week you were able to bench press 190 lbs at 6 reps and the next week you did 200 for 5, this app gives you a way to compare the two as best as possible (190 lbs @ 6 reps gives a 1-rep max estimate of 223 lbs vs. 200 lbs @ 5 reps gives a 1-rep max estimate of 227 lbs) **** PRO VERSION FEATURES **** Upgrade to the Pro version to get all the settings and features! - Ad free experience - Save your lifts and track your history and progress - Historical chart and list views, categorized by exercise - More formulas in order to best estimate your maximums - Multiple rep maxes (up to 10) - Ability to switch between lbs and kgs - Percentage view that shows anywhere from 50% to 125% of your 1-rep max 1RM Calculator is only intended to give estimates based on the data you enter. Since these are calculated values they may vary with actual measured values. Always ensure you have a spotter, and work your way up to your limit with more than adequate warmup to prevent injuries.
1RM
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Screenshots
Verdict
The clearest difference is ads: 1RM Calculator at none against 1RM's shown. On price, in-app purchases, device support and iOS requirement 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 1 one-off in-app purchase and 1RM sells 1 in-app purchase, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.
| Parameter | 1RM Calculator | 1RM |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (222 ratings) — better | — |
| Positive reviews | 36.8% of reviews | — |
| Number of ratings | 222 — better | — |
| Update frequency | Every 3 weeks | — |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.1 | 12.0 — better |
| Further details — not scored | ||
| Size | 20 MB | 67 MB |
| Age rating | 4+ | 12+ |
| Developer | David Bai | ABDULLAH YAVUZ |
Bugs and requests
1RM Calculator
Reported bugs
8 issues- Pro not working after purchase
- Paid upgrade not granting access
- App crashes after upgrade
- Feedback email link broken
- + button crashes app
Show 3 moreShow fewer
- UI truncated for percentages view
- Cannot use three-digit weight numbers
- App crashes after upgrade
Requested features
7 requests- Ability to re-arrange exercises
- Ability to re-name exercises
- Ability to delete exercises
- See all trend lines on one graph
- Track more than one set per day
Show 2 moreShow fewer
- Allow decimals in weight input
- Dark mode
1RM
Not enough reviews yet to summarise bugs or requests.
In-app purchases
1RM Calculator
- Pro Upgrade$1.99
1RM
- 1RM Pro3 Days trial$0.997 Days







