# A4 Mobile vs mSign

The clearest difference is update cadence: mSign at every 2 weeks against A4 Mobile's every 25 months. 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.

A4 Mobile ships an update every 25 months, mSign every 2 weeks. The most recent releases landed on September 21, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | A4 Mobile | mSign |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 25 months | **Every 2 weeks** |
| Size | 10 MB | 38 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Weiran Zhang](https://appshunter.io/developer/588120679) | [Mikrografija d.o.o.](https://appshunter.io/developer/1437749461) |

## What reviewers say

### A4 Mobile

[App page](https://appshunter.io/ios/app/a4-mobile/id799386220)

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

**In-app purchases:** none


### mSign

[App page](https://appshunter.io/ios/app/msign/id1450145100)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is A4 Mobile free?

A4 Mobile is free to download, with no in-app purchases.

### Is mSign free?

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

### Do A4 Mobile or mSign have ads?

Neither A4 Mobile nor mSign shows ads.

### Which is updated more often, A4 Mobile or mSign?

A4 Mobile ships an update every 25 months, and mSign every 2 weeks. Most recently, A4 Mobile was updated on September 21, 2026 and mSign on September 13, 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.*