2FA Authenticator (2FAS) vs ThumbDo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
2FA Authenticator (2FAS)
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.
- Two-factor authentication
- Secure login verification
- Cross-device syncing
- Offline functionality
- Open-source and transparent
- Passcode/biometric protection
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2FAS is the easiest way to enable two-factor authentication (or multi-factor authentication) to verify your identity and securely log in to accounts to keep your personal data and passwords protected from cyber threats — all from one app, 100% free! The world’s most secure, private, and simple 2FA app. Secure: • Easily restore your tokens with backups. • Add app protection with your passcode or biometrics. • 2FAS is open-source, transparent, and community-driven. Simple: • 2FAS syncs across your mobile devices. • An interface designed for simplicity. • One-tap authentication with 2FAS Browser Extensions. • Multi-language support. • Quick guides for setup and support. Private: • 2FAS works offline. • 2FAS doesn't store any passwords or metadata. • 100% anonymous use, no account required. It’s not too late to protect your data, so what are you waiting for? Protect your online accounts and services now with TOTP and HOTP algorithms. Start using the 2FAS authenticator app today! If you have any questions, talk with us on our Discord server: https://discord.gg/q4cP6qh2g5 Learn more about 2FAS: • Check our GitHub repository: https://github.com/twofas • Visit our website at: https://2fas.com/ • Follow us on X: https://x.com/2FAS_com • Subscribe on YouTube: https://www.youtube.com/@2FAS
ThumbDo
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概要 ThumbDo(サムドゥ)は、片手操作に特化した革新的なToDoアプリです。 通勤中の電車内や、荷物を持っている時でも、親指一本と直感的なジェスチャーで タスクをサクサク管理できます。 【主な機能】 - 片手で完結: 全ての操作が画面下部とジェスチャーで行えます。 - シェイクで切替: 端末を振るだけで、仕事・プライベート・買い物などのリストを瞬時に切り替え。 - ツイストで全削除: 完了したタスクを一括削除したい時は、端末を「ひねる」だけ。 - 直感的な入力: プラスボタンをタップして、すぐにタスクを追加。 - アラーム設定: タスクを長押しして、直感的なホイール操作でリマインダーを設定。 【こだわり】 - 美しいデザイン: ダークモードを基調とした、目に優しく洗練されたインターフェース。 - 触覚フィードバック: 操作するたびに心地よい振動が指先に伝わります。 - プライバシー重視: データは端末内に保存され、外部サーバーには送信されません。
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | 2FA Authenticator (2FAS) | ThumbDo |
|---|---|---|
| Price | Free — better | $0.49 |
| Rating | 4.7 (36K ratings) — better | — |
| Positive reviews | 77.5% of reviews | — |
| Number of ratings | 36K — better | — |
| Update frequency | Monthly | Every 2 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, Apple Watch — better | iPhone |
| Requires iOS | 18.6 | 17.0 — better |
| Further details — not scored | ||
| Size | 81 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Two Factor Authentication Service Inc. | 株式会社FF |
Bugs and requests
2FA Authenticator (2FAS)
Reported bugs
3 issues- Tokens disappearing after device changes
- Push notification failures
- Incompatibility with older devices
Requested features
5 requests- Alphanumeric passcode option
- Custom icon uploads
- Apple Watch app
- Desktop/web app
- Improved support and communication
ThumbDo
Not enough reviews yet to summarise bugs or requests.
In-app purchases
2FA Authenticator (2FAS)
No in-app purchases
ThumbDo
No in-app purchases







