# MOBI OFFICE vs RubiMask

The clearest difference is in-app purchases: MOBI OFFICE at none against RubiMask's 3. MOBI OFFICE also leads on ads (none vs shown) and iOS requirement (10.0 vs 17.0). On price, update cadence and device support there is nothing between them.

Both are free to download. RubiMask sells 3 in-app purchases, starting at $2.99 per month. MOBI OFFICE asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 4 weeks. The most recent releases landed on October 18, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | MOBI OFFICE | RubiMask |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 weeks | Every 4 weeks |
| Size | 64 MB | 26 MB |
| Requires iOS | **10.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Dongguan YONGTUO Software Co., Ltd.](https://appshunter.io/developer/958063896) | [KeiK LLC](https://appshunter.io/developer/1854674572) |

## What reviewers say

### MOBI OFFICE

[App page](https://appshunter.io/ios/app/mobi-office/id6747025080)

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

**In-app purchases:** none


### RubiMask

[App page](https://appshunter.io/ios/app/rubimask-ocr-pdf-scanner/id6756987331)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RubiMask Premium | $2.99 | per month |
| RubiMask Premium | $11.99 | per year |
| RubiMask Premium | $19.99 | one-time |


## Frequently asked questions

### Is MOBI OFFICE free?

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

### Is RubiMask free?

RubiMask is free to download, with in-app purchases available.

### Do MOBI OFFICE or RubiMask have ads?

RubiMask shows ads; MOBI OFFICE does not.

### Which is updated more often, MOBI OFFICE or RubiMask?

MOBI OFFICE ships an update every 4 weeks, and RubiMask every 4 weeks. Most recently, MOBI OFFICE was updated on October 18, 2026 and RubiMask on October 14, 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.*