# ZP 8.4AMP vs MDA931

The clearest difference is update cadence: MDA931 at every 2 months against ZP 8.4AMP's every 17 months. ZP 8.4AMP's advantage is iOS requirement (9.0 vs 12.0). 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.

ZP 8.4AMP ships an update every 17 months, MDA931 every 2 months. Both last shipped on October 27, 2026.

## The numbers

| Metric | ZP 8.4AMP | MDA931 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 17 months | **Every 2 months** |
| Size | 2 MB | 4 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Maslim Djanuanto](https://appshunter.io/developer/1521794441) | [杏生 卢](https://appshunter.io/developer/1094592555) |

## What reviewers say

### ZP 8.4AMP

[App page](https://appshunter.io/ios/app/zp-84amp/id1560458373)

**Features:** macOS Compatibility

**In-app purchases:** none


### MDA931

[App page](https://appshunter.io/ios/app/mda931/id6470818095)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ZP 8.4AMP free?

ZP 8.4AMP is free to download, with no in-app purchases.

### Is MDA931 free?

MDA931 is free to download, with no in-app purchases.

### Do ZP 8.4AMP or MDA931 have ads?

Neither ZP 8.4AMP nor MDA931 shows ads.

### Which is updated more often, ZP 8.4AMP or MDA931?

ZP 8.4AMP ships an update every 17 months, and MDA931 every 2 months. Most recently, ZP 8.4AMP was updated on October 27, 2026 and MDA931 on October 27, 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.*