# Interval Timer Calendar vs MuscleMemory

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.

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.

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.

## The numbers

| Metric | Interval Timer Calendar | MuscleMemory |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **53.8% of reviews** | 33.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 days** | Monthly |
| Monetization | **Ad-supported** | Freemium |
| Size | 14 MB | 44 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [isao utsumi](https://appshunter.io/developer/800652888) | [Yosuke Ogata](https://appshunter.io/developer/1574464497) |

## What reviewers say

### Interval Timer Calendar

[App page](https://appshunter.io/ios/app/interval-timer-calendar/id1507102637)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### MuscleMemory

[App page](https://appshunter.io/ios/app/musclememory-workout-tracker/id1586318354)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 【One Month】Premium Features | $2.99 | per month |
| Premium For 3 months | $7.00 | per 3 months |
| 【Annual】Premium Features | $22.99 | per year |
| Remove Ads | $2.99 | one-time |
| 【LifeTime】Premium Features | $49.99 | one-time |


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*