Comparison

RPE Lab vs Muscle Memory

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

Head to head
About

RPE Lab

Features
Read full description

RPE Lab is a simple, fast 1RM and RPE calculator built for strength training. Use it to: • Estimate your 1RM from weight and reps • Choose your preferred formula • Plan training loads using RPE-based targets • Save time between sets with quick, on-the-fly calculations • Register your own personal record on the three main lifts • Watch charts of your personal records Designed to be lightweight and distraction-free: • Works offline • No accounts, no ads • No analytics and no tracking Disclaimer: RPE Lab is for informational purposes only. Always train within your limits and use proper technique.

About

Muscle Memory

Features
Read full description

Muscle Memory helps you keep workout, nutrition, and body-weight records together so you can review your progress over time. LOG YOUR TRAINING Record weights, reps, and sets. Add notes to each set, review previous records, and create your own exercises. Check estimated 1RM and training-volume trends. SEE YOUR TRAINING BALANCE Use the calendar and body-part chart to review when you trained and which muscle groups you worked. TRACK MEALS AND MACROS Log meals, calories, protein, carbs, and fat. Set your own daily targets and review your nutrition records. REVIEW YOUR WEIGHT See your weight history, browse previous weeks, and compare weekly averages. Apple Health integration lets you view supported activity and body measurements after you grant permission. KEEP REST TIME SIMPLE Use the interval timer between sets without leaving the app. START FREE, UPGRADE WHEN YOU NEED MORE Core workout and meal recording is available on the free plan with ads. An optional Premium subscription removes ads and unlocks additional analysis and reports. Compare the plans in the app before purchasing. The price and subscription terms are shown on the purchase screen. Muscle Memory is a recording tool, not medical advice. Estimated 1RM values and nutrition summaries are estimates, not guarantees of results. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

RPE Lab4 screens
Muscle Memory4 screens

Verdict

The call

The clearest difference is in-app purchases: RPE Lab at none against Muscle Memory's 1. RPE Lab also leads on ads (none vs shown). Muscle Memory's advantage is iOS requirement (15.5 vs 18.6). On price, update cadence and device support there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Muscle Memory sells 1 in-app purchase, starting at $2.99 per month. RPE Lab asks for nothing beyond the download.

UpkeepUpdate frequency

RPE Lab ships an update every 8 days, Muscle Memory every 4 days. The most recent releases landed on October 10, 2026 and October 17, 2026 respectively.

Scorecard3 real differences Ā· 3 level
RPE Lab versus Muscle Memory: the parameters behind the verdict, then further details
ParameterRPE LabMuscle Memory
PriceFreeFree
Update frequencyEvery 8 daysEvery 4 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
DevicesiPhone, iPadiPhone, iPod
Requires iOS18.615.5 — better
Further details — not scored
Size9 MB123 MB
Age rating4+4+
DeveloperCarlo Felettihiroto hashimoto

In-app purchases

None

RPE Lab

No in-app purchases

1 purchases

Muscle Memory

Subscriptions1
  • ćƒ—ćƒ¬ćƒŸć‚¢ćƒ ćƒ—ćƒ©ćƒ³$2.991 Month

Questions

Is RPE Lab free?
RPE Lab is free to download, with no in-app purchases.
Is Muscle Memory free?
Muscle Memory is free to download, with in-app purchases available.
Do RPE Lab or Muscle Memory have ads?
Muscle Memory shows ads; RPE Lab does not.
Which is updated more often, RPE Lab or Muscle Memory?
RPE Lab ships an update every 8 days, and Muscle Memory every 4 days. Most recently, RPE Lab was updated on October 10, 2026 and Muscle Memory on October 17, 2026.

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