# 2FA Authenticator (2FAS) vs ThumbDo

The clearest difference is price: 2FA Authenticator (2FAS) at Free against ThumbDo's $0.49. 2FA Authenticator (2FAS) also leads on ads (none vs shown) and device support (3 vs 1). On update cadence, in-app purchases and iOS requirement there is nothing between them.

2FA Authenticator (2FAS) is free to download; ThumbDo costs $0.49 up front. Neither carries in-app purchases, so what you see is what you pay.

2FA Authenticator (2FAS) ships an update monthly, ThumbDo every 2 weeks. The most recent releases landed on November 12, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | 2FA Authenticator (2FAS) | ThumbDo |
| --- | --- | --- |
| Price | **Free** | $0.49 |
| 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** | Yes |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 81 MB | 6 MB |
| Requires iOS | 18.6 | **17.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Two Factor Authentication Service Inc.](https://appshunter.io/developer/1217793793) | [株式会社FF](https://appshunter.io/developer/1858755097) |

## 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


### ThumbDo

[App page](https://appshunter.io/ios/app/thumbdo/id6807333667)

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

**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 ThumbDo free?

ThumbDo costs $0.49, with no in-app purchases.

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

ThumbDo shows ads; 2FA Authenticator (2FAS) does not.

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

2FA Authenticator (2FAS) ships an update monthly, and ThumbDo every 2 weeks. Most recently, 2FA Authenticator (2FAS) was updated on November 12, 2026 and ThumbDo on November 6, 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.*