# J vs mAlert

The clearest difference is update cadence: mAlert at fortnightly against J's every 10 months. J's advantage is device support (3 vs 1) and iOS requirement (14.0 vs 18.2). On price, 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.

J ships an update every 10 months, mAlert fortnightly. The most recent releases landed on October 19, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | J | mAlert |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Fortnightly** |
| Size | 27 MB | 90 MB |
| Requires iOS | **14.0** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 9+ |
| Developer | [Urzad Miasta i Gminy Jelcz-Laskowice](https://appshunter.io/developer/1662376896) | [Go2Shelter](https://appshunter.io/developer/1843455792) |

## What reviewers say

### J

[App page](https://appshunter.io/ios/app/j-l-info/id1662376894)

**Features:** macOS Compatibility

**In-app purchases:** none


### mAlert

[App page](https://appshunter.io/ios/app/malert/id6753319281)

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

**In-app purchases:** none


## Frequently asked questions

### Is J free?

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

### Is mAlert free?

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

### Do J or mAlert have ads?

Neither J nor mAlert shows ads.

### Which is updated more often, J or mAlert?

J ships an update every 10 months, and mAlert fortnightly. Most recently, J was updated on October 19, 2026 and mAlert on October 7, 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.*