# JT Clock vs Ja

The clearest difference is iOS requirement: JT Clock at 13.0 against Ja's 15.1. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

JT Clock ships an update every 5 months, Ja every 4 months. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | JT Clock | Ja |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 4 months** |
| Size | 101 MB | 47 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Jarrison Systems CC](https://appshunter.io/developer/1560624413) | [Erastus Nathingo](https://appshunter.io/developer/1853278019) |

## What reviewers say

### JT Clock

[App page](https://appshunter.io/ios/app/jt-clock/id1560624411)

**In-app purchases:** none


### Ja

[App page](https://appshunter.io/ios/app/ja-nee-bra/id6755342166)

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

**In-app purchases:** none


## Frequently asked questions

### Is JT Clock free?

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

### Is Ja free?

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

### Do JT Clock or Ja have ads?

Neither JT Clock nor Ja shows ads.

### Which is updated more often, JT Clock or Ja?

JT Clock ships an update every 5 months, and Ja every 4 months. Most recently, JT Clock was updated on November 7, 2026 and Ja on October 30, 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.*