# Chin Na In Depth vs SimpleTimerOk

The clearest difference is in-app purchases: SimpleTimerOk at none against Chin Na In Depth's 3. SimpleTimerOk also leads on update cadence (every 3 weeks vs every 34 months) and iOS requirement (12.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. Chin Na In Depth sells 3 one-off in-app purchases. SimpleTimerOk asks for nothing beyond the download.

Chin Na In Depth ships an update every 34 months, SimpleTimerOk every 3 weeks. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Chin Na In Depth | SimpleTimerOk |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/chin-na-in-depth/id1561740159/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 34 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 36 MB | 30 MB |
| Requires iOS | 15.1 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [YMAA Publication Center, Inc.](https://appshunter.io/developer/891633332) | [Sergei Klishin](https://appshunter.io/developer/1618413234) |

## What reviewers say

### Chin Na In Depth

[App page](https://appshunter.io/ios/app/chin-na-in-depth/id1561740159)

Learn Chin Na, a Chinese grappling art focused on seizing control through finger, hand, and joint-locking techniques. This app offers detailed video lessons by Dr. Yang, covering various courses from basic to advanced defensive strategies.

**Highlights:** Stream or download video lessons, Learn 34+ finger, hand, and joint-locking techniques, Detailed instruction by Dr. Yang, Courses on basic to advanced Chin Na, Includes leg wrestling and counter-attacks

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Section 1 | $19.99 | one-time |
| Unlock Section 2 | $19.99 | one-time |
| Unlock Section 3 | $19.99 | one-time |


### SimpleTimerOk

[App page](https://appshunter.io/ios/app/simpletimerok/id6445863709)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Chin Na In Depth free?

Chin Na In Depth is free to download, with in-app purchases available.

### Is SimpleTimerOk free?

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

### Do Chin Na In Depth or SimpleTimerOk have ads?

Neither Chin Na In Depth nor SimpleTimerOk shows ads.

### Which is updated more often, Chin Na In Depth or SimpleTimerOk?

Chin Na In Depth ships an update every 34 months, and SimpleTimerOk every 3 weeks. Most recently, Chin Na In Depth was updated on October 24, 2026 and SimpleTimerOk on October 27, 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.*