Comparison

1RM Calculator vs Platform Manager

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 1RM calculation with RPE
  • Rep max estimation
  • Save 1RM history
  • Customizable exercises
  • Dark theme
Features
Read full description

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/

About

Platform Manager

Features
Read full description

Platform Manager — Training and Meet Management for Powerlifters Whether you're chasing a new PR or prepping for your next meet Platform Manager keeps everything in one place. Training Log Log every set with real weight, reps, and RPE. Track estimated 1-rep max over time with built-in charts for squat, bench, and deadlift. Add session notes and body weight so your training history tells the whole story — not just the numbers. Attempt Planner Plan your openers, second, and third attempts before you ever step on the platform. Weights display in both kg and lb, so there's no last-minute math on meet day. Meets Discover upcoming meets, save the ones you're attending, and pull up the full roster before you compete. On meet day, follow live platform-by-platform lifting order, upcoming lifters, and attempts in real time. Federation Cards Keep your USAPL, USPA, Powerlifting America, and IPF memberships in one place. Make It Yours Choose light, dark, or system theme, and pick an accent color that matches your gym, your team, or just your taste. Built for lifters who want less time managing spreadsheets and more time under the bar.

Screenshots

1RM Calculator4 screens
Platform Manager3 screens

Verdict

The call

The clearest difference is in-app purchases: Platform Manager at none against 1RM Calculator's 3. Platform Manager also leads on update cadence (every 2 weeks vs every 4 months). On price, ads, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. 1RM Calculator sells 3 in-app purchases, starting at $1.99 per month. Platform Manager asks for nothing beyond the download.

UpkeepUpdate frequency

1RM Calculator ships an update every 4 months, Platform Manager every 2 weeks. The most recent releases landed on October 16, 2026 and October 9, 2026 respectively.

Scorecard2 real differences · 8 level
1RM Calculator versus Platform Manager: the parameters behind the verdict, then further details
Parameter1RM CalculatorPlatform Manager
PriceFreeFree
Rating4.9 (116 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings116 — better—
Update frequencyEvery 4 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size28 MB113 MB
Age rating4+17+
DeveloperYuri KoshiishiMichael Ruland

In-app purchases

3 purchases

1RM Calculator

Subscriptions2
  • 1 Rep Max Pro Monthly$1.991 Month
  • 1 Rep Max Pro Annual$9.991 Year
One-time1
  • 1 Rep Max Pro Lifetime$29.99
None

Platform Manager

No in-app purchases

Questions

Is 1RM Calculator free?
1RM Calculator is free to download, with in-app purchases available.
Is Platform Manager free?
Platform Manager is free to download, with no in-app purchases.
Do 1RM Calculator or Platform Manager have ads?
Neither 1RM Calculator nor Platform Manager shows ads.
Which is updated more often, 1RM Calculator or Platform Manager?
1RM Calculator ships an update every 4 months, and Platform Manager every 2 weeks. Most recently, 1RM Calculator was updated on October 16, 2026 and Platform Manager on October 9, 2026.

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