# MemoPass vs Si4Keyboard

The clearest difference is price: MemoPass at Free against Si4Keyboard's $0.99. MemoPass also leads on iOS requirement (15.6 vs 17.6). On update cadence, ads, in-app purchases and device support there is nothing between them.

MemoPass is free to download; Si4Keyboard costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

MemoPass ships an update every 2 weeks, Si4Keyboard fortnightly. The most recent releases landed on October 14, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | MemoPass | Si4Keyboard |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Fortnightly |
| Size | 238 MB | 14 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [PRT SISTEMI SRL](https://appshunter.io/developer/972429077) | [文焕 陈](https://appshunter.io/developer/1810161184) |

## What reviewers say

### MemoPass

[App page](https://appshunter.io/ios/app/memopass/id6504022461)

**Features:** macOS Compatibility

**In-app purchases:** none


### Si4Keyboard

[App page](https://appshunter.io/ios/app/si4keyboard/id6745263713)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is MemoPass free?

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

### Is Si4Keyboard free?

Si4Keyboard costs $0.99, with no in-app purchases.

### Do MemoPass or Si4Keyboard have ads?

Neither MemoPass nor Si4Keyboard shows ads.

### Which is updated more often, MemoPass or Si4Keyboard?

MemoPass ships an update every 2 weeks, and Si4Keyboard fortnightly. Most recently, MemoPass was updated on October 14, 2026 and Si4Keyboard on October 17, 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.*