# J vs BLUEMAX ESP

The clearest difference is update cadence: J at every 5 weeks against BLUEMAX ESP's every 3 months. J also leads on iOS requirement (10.0 vs 15.0). 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.

J ships an update every 5 weeks, BLUEMAX ESP every 3 months. The most recent releases landed on September 5, 2026 and August 10, 2026 respectively.

## The numbers

| Metric | J | BLUEMAX ESP |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 3 months |
| Size | 10 MB | 29 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TheJoin Co.,Ltd.](https://appshunter.io/developer/1592642302) | [SECUi Corp.](https://appshunter.io/developer/1607440583) |

## What reviewers say

### J

[App page](https://appshunter.io/ios/app/j-vmp/id1565766229)

**Features:** macOS Compatibility

**In-app purchases:** none


### BLUEMAX ESP

[App page](https://appshunter.io/ios/app/bluemax-esp/id6473090718)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is J free?

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

### Is BLUEMAX ESP free?

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

### Do J or BLUEMAX ESP have ads?

Neither J nor BLUEMAX ESP shows ads.

### Which is updated more often, J or BLUEMAX ESP?

J ships an update every 5 weeks, and BLUEMAX ESP every 3 months. Most recently, J was updated on September 5, 2026 and BLUEMAX ESP on August 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.*