SentryKey

At a glance

• Editor score
  3.0 / 10
• Pricing
  Free plan
• Best for
  Garmin users wanting OTP codes on their watch
• Free plan
  Yes
• Paid from
  Free
• Facts checked
  22 Sep 2026

• Where it wins

  • Generates RFC 6238 TOTP codes directly on Garmin watches
  • Supports encrypted backups, passphrase-protected exports, and imports
  • Free with no subscriptions, paid tiers, or ads

• Where it doesn't

  • The verified code type is limited to TOTP
  • Garmin Connect IQ support makes the platform focus specialized
  • The project is not security-audited and is positioned as a personal project

Our verdict on SentryKey

SentryKey is a free, open-source TOTP authenticator for people who want rotating two-factor authentication codes on a Garmin watch. Its Android companion app lets users scan QR codes or enter accounts manually, then synchronize them to a Garmin watch over Bluetooth. Codes can be generated on the watch without a nearby phone, making the product particularly relevant to Garmin users who prefer to leave their phone aside during authentication. The product is positioned for personal use rather than business identity or team management.

The strongest part of SentryKey is its Garmin-focused workflow. It supports Garmin Connect IQ, Bluetooth synchronization, phone-to-watch restoration, and optional end-to-end encryption for watch synchronization. Users can import accounts from Google Authenticator and otpauth sources, while on-device encrypted storage is available on Android and iOS. Encrypted backups use a passphrase, and the vault can be restored from the watch to a phone. Together, these features give the product a distinct ecosystem fit, but that fit is specialized around Garmin hardware and TOTP accounts.

Pricing is straightforward: the Free plan has no paid tiers, no subscriptions, and no ads. That makes SentryKey easy to evaluate for individual users who need TOTP codes and Garmin access without recurring cost. The main trade-offs are its narrow code-type focus and project maturity. The Android app is in closed beta, the iOS companion is planned, and the project is described as a personal or hobby project rather than a security-audited product. Choose SentryKey for Garmin-centered personal authentication; choose an alternative if you need broader authentication methods, established enterprise administration, or a security-audited platform.

Your product? Our editors can test SentryKey in depth and publish a review, labelled as paid · from $149/mo →

SentryKey pricing

All 1 SentryKey plans and prices →

SentryKey fact sheet

SentryKey integrations

SentryKey lists 3 integrations on its own site.

• Garmin Connect IQ
• Google Authenticator import
• otpauth://

Alternatives to SentryKey

• Proton AuthenticatorA mature free option for secure 2FA codes across mobile and desktop platforms.9.4
• GAGoogle AuthenticatorA free, straightforward authenticator with offline codes, sync, and QR transfers.9.2
• AuthyA focused free authenticator for mobile users who need synced TOTP tokens.9.1

See all SentryKey alternatives →

Featured on iTechGuides

SentryKey is listed in our Authenticator Apps directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update