# MASTECH vs JiaClock

The clearest difference is in-app purchases: MASTECH at none against JiaClock's 3. MASTECH also leads on iOS requirement (12.0 vs 17.0). JiaClock's advantage is update cadence (every 4 days vs every 76 months). On price, ads and device support there is nothing between them.

Both are free to download. JiaClock sells 3 in-app purchases, starting at $0.99 per month. MASTECH asks for nothing beyond the download.

MASTECH ships an update every 76 months, JiaClock every 4 days. The most recent releases landed on September 16, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | MASTECH | JiaClock |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 76 months | **Every 4 days** |
| Size | 7 MB | 30 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [MGL APPA CORPORATION](https://appshunter.io/developer/1121102475) | [Beijing Boshujia Technology Co., Ltd](https://appshunter.io/developer/1666207574) |

## What reviewers say

### MASTECH

[App page](https://appshunter.io/ios/app/mastech/id1229324045)

**Features:** macOS Compatibility

**In-app purchases:** none


### JiaClock

[App page](https://appshunter.io/ios/app/jiaclock/id6776895229)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Xiaojia Clock Pro Monthly | $0.99 | per month |
| Xiaojia Clock Pro Yearly | $0.99 | per year |
| Xiaojia Clock Pro Lifetime | $1.99 | one-time |


## Frequently asked questions

### Is MASTECH free?

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

### Is JiaClock free?

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

### Do MASTECH or JiaClock have ads?

Neither MASTECH nor JiaClock shows ads.

### Which is updated more often, MASTECH or JiaClock?

MASTECH ships an update every 76 months, and JiaClock every 4 days. Most recently, MASTECH was updated on September 16, 2026 and JiaClock on September 13, 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.*