# Key4Friends vs 2FA Authenticator (2FAS)

The clearest difference is review sentiment: 2FA Authenticator (2FAS) at 77% against Key4Friends's 9%. 2FA Authenticator (2FAS) also leads on update cadence (monthly vs every 9 months) and iOS requirement (18.6 vs 26.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Key4Friends ships an update every 9 months, 2FA Authenticator (2FAS) monthly. The most recent releases landed on October 10, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Key4Friends | 2FA Authenticator (2FAS) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (36K ratings)](https://appshunter.io/ios/app/2fa-authenticator-2fas/id1217793794/reviews)** |
| Number of ratings | — | **36K** |
| Positive reviews | 9.1% of reviews | **77.4% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Monthly** |
| Monetization | Free | Free |
| Size | 61 MB | 80 MB |
| Requires iOS | 26.0 | **18.6** |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [SimonsVoss Technologies GmbH](https://appshunter.io/developer/1141846652) | [Two Factor Authentication Service Inc.](https://appshunter.io/developer/1217793793) |

## What reviewers say

### Key4Friends

[App page](https://appshunter.io/ios/app/key4friends/id1141846653)

Easily and securely share access to doors with friends and family. Receive authorizations from the MobileKey app to open and close designated doors directly from your smartphone. Requires an internet connection for operation.

**Highlights:** Receive digital door keys, Open and close authorized doors, Secure key distribution, Easy friend sharing, Email and SMS verification

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

**In-app purchases:** none


### 2FA Authenticator (2FAS)

[App page](https://appshunter.io/ios/app/2fa-authenticator-2fas/id1217793794)

Securely log in to your online accounts with two-factor authentication. This app protects your personal data and passwords from cyber threats with a simple, private, and open-source solution. It offers easy token restoration, app protection, and offline functionality.

**Highlights:** Two-factor authentication, Token backup and restore, App protection with passcode/biometrics, Open-source and transparent, Offline functionality, Cross-device sync, One-tap authentication with browser extensions

**Features:** Apple Watch app

**In-app purchases:** none

**What reviewers like**

- 🚀 Efficient and fast
- 🔒 Secure and private
- 👍 Simple and intuitive UI
- 💡 Customizable icons and folders
- 🔒 iCloud backup and sync

**What reviewers complain about**

- 🐛 Occasional bugs and crashes
- 🔒 Lack of password/PIN protection
- 🕰 No Apple Watch app
- 🐛 Issues with push notifications
- 🕰 Missing desktop/web app

**Reported bugs**

- Tokens disappearing after device changes
- Push notification failures
- Incompatibility with older devices

**Requested features**

- Alphanumeric passcode option
- Custom icon uploads
- Apple Watch app
- Desktop/web app
- Improved support and communication


## Frequently asked questions

### Is Key4Friends free?

Key4Friends is free to download, with no in-app purchases.

### Is 2FA Authenticator (2FAS) free?

2FA Authenticator (2FAS) is free to download, with no in-app purchases.

### Do Key4Friends or 2FA Authenticator (2FAS) have ads?

Neither Key4Friends nor 2FA Authenticator (2FAS) shows ads.

### Which is updated more often, Key4Friends or 2FA Authenticator (2FAS)?

Key4Friends ships an update every 9 months, and 2FA Authenticator (2FAS) monthly. Most recently, Key4Friends was updated on October 10, 2026 and 2FA Authenticator (2FAS) on October 22, 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.*