# JM vs mapry

The clearest difference is update cadence: mapry at every 2 weeks against JM's monthly. JM's advantage is iOS requirement (13.0 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

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

JM ships an update monthly, mapry every 2 weeks. The most recent releases landed on October 3, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | JM | mapry |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Size | 18 MB | 126 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Japan Radio Co.,Ltd.](https://appshunter.io/developer/932220259) | [MAPRY Co., Ltd.](https://appshunter.io/developer/1394357768) |

## What reviewers say

### JM

[App page](https://appshunter.io/ios/app/jm-watcher/id932220260)

**In-app purchases:** none


### mapry

[App page](https://appshunter.io/ios/app/mapry/id1394357769)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is JM free?

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

### Is mapry free?

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

### Do JM or mapry have ads?

Neither JM nor mapry shows ads.

### Which is updated more often, JM or mapry?

JM ships an update monthly, and mapry every 2 weeks. Most recently, JM was updated on October 3, 2026 and mapry on October 10, 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.*