# SleepSign vs MuscleTrainingTimer

The clearest difference is in-app purchases: SleepSign at none against MuscleTrainingTimer's 1. MuscleTrainingTimer's advantage is update cadence (every 9 days vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. MuscleTrainingTimer sells 1 one-off in-app purchase. SleepSign asks for nothing beyond the download.

SleepSign ships an update monthly, MuscleTrainingTimer every 9 days. The most recent releases landed on September 17, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | SleepSign | MuscleTrainingTimer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 9 days** |
| Size | 32 MB | 20 MB |
| Requires iOS | **15.5** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Kissei Comtec Co., Ltd.](https://appshunter.io/developer/503794772) | [ryo muranaka](https://appshunter.io/developer/1606480078) |

## What reviewers say

### SleepSign

[App page](https://appshunter.io/ios/app/sleepsign-cloud/id1661601576)

**In-app purchases:** none


### MuscleTrainingTimer

[App page](https://appshunter.io/ios/app/muscletrainingtimer-exercise/id6446249318)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Pro | $19.99 | one-time |


## Frequently asked questions

### Is SleepSign free?

SleepSign is free to download, with no in-app purchases.

### Is MuscleTrainingTimer free?

MuscleTrainingTimer is free to download, with in-app purchases available.

### Do SleepSign or MuscleTrainingTimer have ads?

Neither SleepSign nor MuscleTrainingTimer shows ads.

### Which is updated more often, SleepSign or MuscleTrainingTimer?

SleepSign ships an update monthly, and MuscleTrainingTimer every 9 days. Most recently, SleepSign was updated on September 17, 2026 and MuscleTrainingTimer on September 14, 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.*