Comparison

Interval Timer Calendar vs MuscleMemory

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

Head to head
About

Interval Timer Calendar

This app helps you track your workouts with a simple timer and calendar integration. Set your training and break times, and automatically record your sessions. Save custom timers for quick access to your favorite routines.

Highlights
  • Muscle training timer
  • Automatic calendar recording
  • Save custom timer lists
  • Background operation support
  • Notification alerts
  • Workout review on calendar
Features
Read full description

It is a simple muscle training timer application that can perform timer and recording at the same time. You can start the timer as soon as you set the number of sets, training time, and break time. After the timer expires, it is automatically recorded on the calendar. If you save in the timer list in advance such as daily training, muscle training, stretching, you can always start the timer with one tap. It is automatically saved in the calendar so you can review the training content and number of times later. Because it supports the background, you can use it while listening to videos and music, and you will be notified by notification. [App Features] When using the timer, you will be notified by notification even if you do not open the app. If you write down and save the number of reps in the timer list, you can use it as a simple muscle training record. You can review past timer records on the calendar. You can use it while listening to music. If you like the app, I would be grateful if you could review it. Developers have read your reviews and are motivated!

About

MuscleMemory

This app helps you track your fitness progress with a visual workout calendar and daily check-in photos. Log custom routines, keep fit notes, and review your history to see your dedication and build lasting habits.

Highlights
  • Visual workout calendar
  • Daily body check photos
  • Customizable training menus
  • Daily fit notes and reflections
  • Workout history and analytics
Read full description

Make every gym day count with MuscleMemory, the ultimate visual fitness companion. Whether you are pushing through a heavy set or just starting your fitness journey, having a reliable workout tracker log is essential for seeing real results. MuscleMemory is more than just a standard gym log, plus it provides the visual motivation you need to keep going. By combining a powerful gym tracker with a highly visual calendar, you can see your dedication at a single glance. Keep your fit notes organized, track your progression, and build habits that last. Key Features: Visual Workout Calendar: Your calendar cells instantly update with the icon of the first training menu you complete each day. Seeing your month fill up with workout images is incredibly satisfying! Daily Body Check Photos: Snap a quick photo after your workout to visually track your physical changes. Detailed Training Menus: Create custom routines, attach unique images to each exercise, and log exactly what you accomplished. Daily Memos: Keep your fit notes, thoughts, and daily reflections secure. Write down how you felt when the weights got hevy or when you needed that extra viggy energy to finish your routine. History & Analytics: Look back at your past performance to ensure you are constantly improving. Stop losing your progress in complicated spreadsheets. Download MuscleMemory today and turn your hard work into an unforgettable visual gym log. Looking for Gym Tracker EULA: https://docs.google.com/document/d/1xE1VPcFwmrOfKVpeE_wRS0SQ5K6d1VZB4qptcRp1Q5Y/edit?usp=sharing

Screenshots

Interval Timer Calendar1 screens
MuscleMemory4 screens

Verdict

The call

The clearest difference is in-app purchases: Interval Timer Calendar at none against MuscleMemory's 5. Interval Timer Calendar also leads on update cadence (every 3 days vs monthly) and review sentiment (54% vs 33%). MuscleMemory's advantage is ads (none vs shown). On price and device support 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. MuscleMemory sells 5 in-app purchases, starting at $2.99 per month. Interval Timer Calendar asks for nothing beyond the download.

UpkeepUpdate frequency

Interval Timer Calendar ships an update every 3 days, MuscleMemory monthly. The most recent releases landed on September 25, 2026 and September 15, 2026 respectively.

Scorecard6 real differences · 2 level
Interval Timer Calendar versus MuscleMemory: the parameters behind the verdict, then further details
ParameterInterval Timer CalendarMuscleMemory
PriceFreeFree
Positive reviews53.8% of reviews — better33.3% of reviews
Update frequencyEvery 3 days — betterMonthly
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported — betterFreemium
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better15.0
Further details — not scored
Size14 MB44 MB
Age rating4+4+
Developerisao utsumiYosuke Ogata

Customer experience

Interval Timer Calendar

Written reviews13 reviews
Positive53.8%
Neutral23.1%
Negative23.1%

MuscleMemory

Written reviews3 reviews
Positive33.3%
Neutral33.3%
Negative33.3%

In-app purchases

None

Interval Timer Calendar

No in-app purchases

5 purchases

MuscleMemory

Subscriptions3
  • 【One Month】Premium Features$2.991 Month
  • Premium For 3 months$7.003 Months
  • 【Annual】Premium Features3 Days trial$22.991 Year
One-time2
  • Remove Ads$2.99
  • 【LifeTime】Premium Features$49.99

Questions

Is Interval Timer Calendar free?
Interval Timer Calendar is free to download, with no in-app purchases.
Is MuscleMemory free?
MuscleMemory is free to download, with in-app purchases available.
Do Interval Timer Calendar or MuscleMemory have ads?
Interval Timer Calendar shows ads; MuscleMemory does not.
Which is updated more often, Interval Timer Calendar or MuscleMemory?
Interval Timer Calendar ships an update every 3 days, and MuscleMemory monthly. Most recently, Interval Timer Calendar was updated on September 25, 2026 and MuscleMemory on September 15, 2026.

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