4OTP
- Android app
- Yes
- Free plan
- Yes
- Paid plans from
- $3/mo
- Runs on
- Android, iOS, Mac, Windows
Summary
4OTP generates six-digit time-based one-time passwords that refresh every 30 seconds to help protect online accounts. It is available on Windows, macOS, iOS, and Android, and its apps can be used offline without an account. The app supports searching, pinning, and renaming codes, as well as automatic icons, next-code display, and recovery of deleted codes. Codes can be imported from Google Authenticator and exported to Google Authenticator or compatible apps. Encrypted backup files can be restored on another device. The maker says local data is encrypted with a password-derived key and AES-GCM, while Sync uses end-to-end encryption. Sync supports up to 50 devices, keeps the last 50 changes, and lets users revert to an earlier code-list version. Free apps include encrypted local storage, backups, and offline use. The optional Sync plan costs US$36 per year. The maker says it cannot decrypt codes without the password, so a forgotten password means losing access to them.
Who it is for
4OTP suits people who want a TOTP authenticator across supported desktop and mobile platforms, including offline use. Sync may suit users who need their code list across multiple devices.
What is good
- Works offline without an account
- Encrypted backups can be restored on another device
- Sync supports up to 50 devices
- Free apps have no ads or tracking
What to know first
- Forgetting the password means losing access to codes
- Sync costs US$36 per year
- Linux support is not currently available
Verdict
4OTP combines offline TOTP code generation with encrypted backups and optional multi-device Sync. Keep the password safe, since the maker says it cannot recover codes without it.
4OTP plans and pricing
All plansCompared on authenticator apps
Facts
- Purpose
- 4OTP generates six-digit time-based one-time passwords that change every 30 seconds to help secure online accounts.4otp.com · 4 Oct 2026
- Code management
- The app supports code search, pinning, renaming, automatic icons, next-code display, and recovery of deleted codes.4otp.com · 4 Oct 2026
- Import and export
- Users can import codes from Google Authenticator and export codes to Google Authenticator or compatible apps.4otp.com · 4 Oct 2026
- Encrypted backups
- Users can export codes in a fully encrypted backup file and restore that file on another device.4otp.com · 4 Oct 2026
- Encryption
- The maker says 4OTP encrypts data on the device using a password-derived key and AES-GCM, and uses end-to-end encryption for Sync.4otp.com · 4 Oct 2026
- Password recovery limit
- The maker says it cannot decrypt codes without the password, so losing the password means losing access to the codes.4otp.com · 4 Oct 2026
- Sync history
- Sync records the last 50 changes and lets users revert their devices to a previous code-list version.4otp.com · 4 Oct 2026
- Device limit
- The Sync plan supports up to 50 devices.4otp.com · 4 Oct 2026
- Sharing and access control
- Users can create separate Sync access keys for devices or other people and delete keys to revoke access.4otp.com · 4 Oct 2026
- Offline use
- The apps can work offline without an account; an account is used for the optional Sync service.4otp.com · 4 Oct 2026
- Supported versions
- The download page lists Windows 10 or newer, macOS 10.13 or newer, Android 12 or newer, and iOS 16 or newer.4otp.com · 4 Oct 2026
- Languages
- The apps include 22 languages, with device-language detection and an option to choose a language in settings.4otp.com · 4 Oct 2026
- Support
- The maker directs users to email [email protected] and says it will respond as quickly as possible.4otp.com · 4 Oct 2026
- Maker and Linux
- The About page identifies Weeblr as the maker and says Linux support is a goal, but is not available currently.4otp.com · 4 Oct 2026
Best 4OTP alternatives
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Where it ranks on Everything Xiaomi
- Best Authenticator Apps in 2026#34 of 113
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Sources
- 4otp.com/faq/· checked 4 Oct 2026
- 4otp.com· checked 4 Oct 2026
- 4otp.com/doc/· checked 4 Oct 2026
- 4otp.com/doc/backup-restore/· checked 4 Oct 2026
- 4otp.com/doc/encryption/· checked 4 Oct 2026
- 4otp.com/doc/synchronization/· checked 4 Oct 2026
- 4otp.com/download/· checked 4 Oct 2026
- 4otp.com/about/· checked 4 Oct 2026