Comparison

2FA Authenticator (2FAS) vs LentBook

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Two-factor authentication
  • Secure login verification
  • Cross-device syncing
  • Offline functionality
  • Open-source and transparent
  • Passcode/biometric protection
Features
Read 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

About

LentBook

Features
Read 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

2FA Authenticator (2FAS)4 screens
LentBook3 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
2FA Authenticator (2FAS) versus LentBook: the parameters behind the verdict, then further details
Parameter2FA Authenticator (2FAS)LentBook
PriceFreeFree
Rating4.7 (36K ratings) — better—
Positive reviews77.5% of reviews—
Number of ratings36K — better—
Update frequencyMonthlyEvery 2 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, Apple Watch — betteriPhone
Requires iOS18.616.4 — better
Further details — not scored
Size81 MB56 MB
Age rating4+4+
DeveloperTwo 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

None

2FA Authenticator (2FAS)

No in-app purchases

None

LentBook

No in-app purchases

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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