2FA Authenticator (2FAS) vs LentBook
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
Read full descriptionHide full description
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
LentBook
Read full descriptionHide full description
LentBook is a calm, offline-first way to keep track of everything you lend to friends and family — books, tools, games, electronics, anything. No more "did I ever get that back?" moments. WHAT YOU CAN DO • Add a loan in three quick steps: snap a photo, write down who has it, set a return date • Pick a borrower from your contacts, or just type a name • See at a glance what's overdue, due soon, or comfortably out • Get gentle reminders one day before, on the due date, or weekly if something stays out too long • Send a friendly "still got it?" message in one tap • Review your lending history and see who borrows what most DESIGNED TO FEEL CALM LentBook isn't built to nag. Overdue items are shown in a warm, soft way — present enough to notice, never aggressive. The whole app is designed around the feeling of generosity, not anxiety. PRIVACY FIRST Everything stays on your device. No accounts, no cloud, no tracking. Your contacts are only opened when you tap to pick someone — never read in the background. LANGUAGES English and Dutch.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | 2FA Authenticator (2FAS) | LentBook |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (36K ratings) — better | — |
| Positive reviews | 77.5% of reviews | — |
| Number of ratings | 36K — better | — |
| Update frequency | Monthly | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, Apple Watch — better | iPhone |
| Requires iOS | 18.6 | 16.4 — better |
| Further details — not scored | ||
| Size | 81 MB | 56 MB |
| Age rating | 4+ | 4+ |
| Developer | Two Factor Authentication Service Inc. | KenisInternet |
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
LentBook
Not enough reviews yet to summarise bugs or requests.
In-app purchases
2FA Authenticator (2FAS)
No in-app purchases
LentBook
No in-app purchases
Questions
Is 2FA Authenticator (2FAS) free?
Is LentBook free?
Do 2FA Authenticator (2FAS) or LentBook have ads?
Which is updated more often, 2FA Authenticator (2FAS) or LentBook?
Other comparisons















