Comparison

Muscle Memory Lifting vs Fast Slow

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

Head to head
About

Muscle Memory Lifting

This AI-powered workout companion offers personalized coaching to help users achieve fitness goals efficiently. It provides exercise guidance, rest timers, and advanced tracking features for both beginners and experienced lifters.

Highlights
  • AI coaching for optimal gains
  • Offline workout support
  • Exercise guides and form queues
  • Rest timer
  • Superset and drop set tracking
  • Custom muscle and equipment types
Features
Read full description

Muscle Memory Lifting is a workout companion/personal trainer intended to help you reach your fitness goals as efficiently as possible. For everyone: - Offline support, no cell service needed For beginners: - Exercise guides and queues to help with form - Rest timer For veterans: - Superset and drodpset tracking - Separate eccentric/concentric load tracking - Fine tune each part of your plan - Custom muscle/equipment types Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Fast Slow

Understand your body's metabolic changes during fasting with a visual timeline. This free app guides you through different fasting zones, from digestion to deep ketosis, and offers customizable schedules and smart notifications. It provides stats, streaks, and widgets for easy progress tracking.

Highlights
  • Fasting timer with visual timeline
  • 6 customizable fasting schedules
  • 5 distinct fasting zones explained
  • Smart notifications for fasting windows
  • Stats, streaks, and trends tracking
  • Home and Lock Screen widgets
  • Siri Shortcuts integration
Features
Read full description

See what happens inside your body as you fast. Fast Slow walks you through 5 fasting zones, from digestion through fat burning to deep ketosis, so you understand what every hour of your fast is doing. 100% free. Every feature. No ads. No paywalls. No trackers. Free forever. WHAT MAKES FAST SLOW DIFFERENT Most fasting apps just count down a timer. Fast Slow shows you what's actually happening in your body at each stage: - Anabolic (0-4h): Digesting and storing nutrients - Catabolic (4-8h): Tapping into energy reserves - Fat Burning (8-12h): The metabolic switch - Ketosis (12-16h): Ketones and cellular cleanup - Deep Ketosis (16h+): Deep cellular renewal Tap any zone to learn more about the science behind it. 100% FREE. EVERY FEATURE INCLUDED. No premium tier. No trial that expires. No paywall gates. Every feature in Fast Slow is yours from day one: - All 6 fasting schedules - All stats, streaks, and trends - All widgets (Home Screen and Lock Screen) - All notifications - Siri Shortcuts - iCloud sync - Data export Everything free. No catches. FEATURES Fasting Timer One tap to start. One tap to stop. A visual timeline shows where you are, what zone you're in, and what comes next. 6 Fasting Schedules 12:12 for beginners, 14:10, 16:8 (the most popular), 18:6, 20:4, and OMAD (one meal a day) for experienced fasters. Visual Timeline Color-coded timeline of your fasting and eating windows. Plan meals, training, and recovery at a glance. Smart Notifications 7 notification types: goal reached, halfway there, one hour left, eating window alerts, and a custom last meal reminder. Nudges, not nags. Stats & Streaks Total fasts, average duration, personal records, weekly trends, and a monthly fasting calendar. Small wins add up. Widgets Home Screen and Lock Screen widgets with progress rings, timelines, and live timers. Check your fast without opening the app. Siri Shortcuts "Hey Siri, start my fast." Start, stop, and check your fasting status hands-free. AI-Powered Greetings On supported devices, Apple Intelligence creates personalized messages based on your fasting progress, streak, and time of day. iCloud Sync Your fasting data syncs automatically across all your devices. Data You Own Export your fasting history as JSON. Delete everything with one tap. Your data, your choice. DESIGNED FOR REAL LIFE Pick a schedule, adjust as needed, and let Fast Slow handle the timing. New to fasting or already have a routine, it works either way. Structure when you want it, out of the way when you don't. Built by one developer who fasts every day. No corporate agenda. No growth hacking. A well-made tool that respects your time and your data. RESPONSIBLE APPROACH Intermittent fasting can support weight management, energy, and focus, but results vary. Fast Slow provides tools and information, not medical advice. If you have health conditions, are pregnant, or have a history of eating disorders, please talk to a healthcare professional before starting. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://cernezan.com/fast-slow/privacy/

Screenshots

Muscle Memory Lifting4 screens
Fast Slow4 screens

Verdict

The call

The clearest difference is monetization model: Fast Slow at free against Muscle Memory Lifting's freemium. Fast Slow also leads on update cadence (every 2 weeks vs every 2 months) and ratings volume (36 vs 3). Muscle Memory Lifting's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 18.0). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Muscle Memory Lifting sells 5 in-app purchases, starting at $2.99 per month and Fast Slow sells 4 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Muscle Memory Lifting against 5.0 for Fast Slow. That said, the two scores are not equally well evidenced: Fast Slow has 36 ratings behind it against 3, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Muscle Memory Lifting ships an update every 2 months, Fast Slow every 2 weeks. The most recent releases landed on October 10, 2026 and October 17, 2026 respectively.

Scorecard5 real differences · 5 level
Muscle Memory Lifting versus Fast Slow: the parameters behind the verdict, then further details
ParameterMuscle Memory LiftingFast Slow
PriceFreeFree
Rating5.0 (3 ratings)5.0 (36 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings336 — better
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFree — better
DevicesiPhone, iPod, Apple Watch — betteriPhone
Requires iOS15.1 — better18.0
Further details — not scored
Size70 MB23 MB
Age rating4+4+
DeveloperGarcia Embedded SolutionsZan Cerne

Customer experience

Muscle Memory Lifting

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Fast Slow

All ratings36 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

5 purchases

Muscle Memory Lifting

Subscriptions2
  • Premium Membership$2.991 Month
  • Yearly subscription$29.991 Year
One-time3
  • 100 AI Credits$0.99
  • 250 AI Credits$1.99
  • 500 AI Credits$3.99
4 purchases

Fast Slow

Subscriptions2
  • Legacy$1.997 Days
  • Legacy - Yearly3 Days trial$12.991 Year
One-time2
  • Buy Me a Coffee$2.99
  • You're Amazing$9.99

Questions

Is Muscle Memory Lifting free?
Muscle Memory Lifting is free to download, with in-app purchases available.
Is Fast Slow free?
Fast Slow is free to download, with in-app purchases available.
Which has better reviews, Muscle Memory Lifting or Fast Slow?
Muscle Memory Lifting and Fast Slow are both rated 5.0 out of 5 on the App Store, from 3 and 36 ratings respectively.
Do Muscle Memory Lifting or Fast Slow have ads?
Neither Muscle Memory Lifting nor Fast Slow shows ads.
Which is updated more often, Muscle Memory Lifting or Fast Slow?
Muscle Memory Lifting ships an update every 2 months, and Fast Slow every 2 weeks. Most recently, Muscle Memory Lifting was updated on October 10, 2026 and Fast Slow on October 17, 2026.

Other comparisons