# AirGap Vault vs Si4Keyboard

The clearest difference is price: AirGap Vault at Free against Si4Keyboard's $0.99. AirGap Vault also leads on iOS requirement (13.0 vs 17.6). Si4Keyboard's advantage is update cadence (fortnightly vs every 2 months). On ads, in-app purchases and device support there is nothing between them.

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

AirGap Vault ships an update every 2 months, Si4Keyboard fortnightly. The most recent releases landed on October 6, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | AirGap Vault | Si4Keyboard |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.4 (27 ratings)](https://appshunter.io/ios/app/airgap-vault-secure-secrets/id1417126841/reviews)** | — |
| Number of ratings | **27** | — |
| Positive reviews | 38.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 116 MB | 14 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Papers GmbH](https://appshunter.io/developer/499825586) | [文焕 陈](https://appshunter.io/developer/1810161184) |

## What reviewers say

### AirGap Vault

[App page](https://appshunter.io/ios/app/airgap-vault-secure-secrets/id1417126841)

This app transforms your phone into a secure, offline cryptocurrency vault. It supports numerous blockchains and integrates with other wallets for seamless, secure transaction signing without network connection.

**Highlights:** Blockchain agnostic crypto vault, Offline private key storage, Verifiable QR code transaction signing, Supports multiple companion wallets, Segwit support, Offline key generation, Shamir Shares (Social Recovery)

**Features:** Vision Pro support

**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 AirGap Vault free?

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

### Is Si4Keyboard free?

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

### Do AirGap Vault or Si4Keyboard have ads?

Neither AirGap Vault nor Si4Keyboard shows ads.

### Which is updated more often, AirGap Vault or Si4Keyboard?

AirGap Vault ships an update every 2 months, and Si4Keyboard fortnightly. Most recently, AirGap Vault was updated on October 6, 2026 and Si4Keyboard on October 1, 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.*