# 2FA Authenticator (2FAS) vs LentBook

The clearest difference is update cadence: LentBook at every 2 days against 2FA Authenticator (2FAS)'s monthly. LentBook also leads on iOS requirement (16.4 vs 18.6). 2FA Authenticator (2FAS)'s advantage is device support (3 vs 1). On price, ads and in-app purchases there is nothing between them.

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

2FA Authenticator (2FAS) ships an update monthly, LentBook every 2 days. The most recent releases landed on November 12, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 2FA Authenticator (2FAS) | LentBook |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (36K ratings)](https://appshunter.io/ios/app/2fa-authenticator-2fas/id1217793794/reviews)** | — |
| Number of ratings | **36K** | — |
| Positive reviews | 77.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 days** |
| Monetization | Free | — |
| Size | 81 MB | 56 MB |
| Requires iOS | 18.6 | **16.4** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Two Factor Authentication Service Inc.](https://appshunter.io/developer/1217793793) | [KenisInternet](https://appshunter.io/developer/415567138) |

## What reviewers say

### 2FA Authenticator (2FAS)

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

Securely protect your online accounts with two-factor authentication. This app offers easy setup, offline functionality, and cross-device syncing to safeguard your personal data and passwords from cyber threats.

**Highlights:** Two-factor authentication, Secure login verification, Cross-device syncing, Offline functionality, Open-source and transparent, Passcode/biometric protection

**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


### LentBook

[App page](https://appshunter.io/ios/app/lentbook/id6779988846)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

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

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

### Is LentBook free?

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

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

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

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

2FA Authenticator (2FAS) ships an update monthly, and LentBook every 2 days. Most recently, 2FA Authenticator (2FAS) was updated on November 12, 2026 and LentBook on October 31, 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.*