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Chronos Authenticator

Free#93 of 111 in Authenticator Apps

Chronos Authenticator: Private, account-free OTP storage for iPhone, with encrypted iCloud sync. Ranked #93 of 111 in Authenticator Apps by our editors (3.0/10); pricing: Free plan; best for iPhone users wanting private open-source OTP storage.

3.0/10Editor score

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Chronos Authenticator3.0 Visit Chronos

At a glance

Editor score
3.0 / 10
Pricing
Free plan
Best for
iPhone users wanting private open-source OTP storage
Free plan
Yes
Paid from
Free
Facts checked
22 Sep 2026

Where it wins
- Supports both TOTP and HOTP code generation
- End-to-end encrypted storage with optional iCloud backup and sync
- Imports and exports tokens, with search and tagging tools
Where it doesn't
- Available only on iPhone
- Sync and backup depend on iCloud
- No integrations beyond iCloud are listed

Our verdict on Chronos Authenticator

Chronos Authenticator is a free, open-source two-factor authentication app for iPhone users who need TOTP and HOTP code generation. It stores tokens with end-to-end encryption, does not require an app account, and states that it collects no telemetry. The product is suited to people who want local account independence and a focused OTP vault rather than a multi-platform authentication service.

Its privacy and data-management features are the main strengths. Tokens can be backed up and synchronized through iCloud, with encrypted and unencrypted export options for different migration needs. Chronos can also import tokens from other authenticator apps, while search and tagging help organize larger token collections. These tools make it easier to move into the app or maintain an orderly token library without requiring a Chronos account.

The trade-off is platform scope. Chronos is distributed for iPhone, so it is a poor fit for households or teams that need Android, desktop, or broader cross-platform coverage. Its listed ecosystem connection is iCloud, which makes it more suitable for users already within Apple’s platform than for buyers seeking extensive integrations. Choose Chronos for free, open-source TOTP and HOTP storage with optional encrypted iCloud synchronization; choose an alternative when wider device support or a larger integration ecosystem matters more.

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

Chronos Authenticator pricing

Plans Free planFree Free to use — no paid tier required for the core job.

See plans on github.com

All 1 Chronos Authenticator plans and prices →

Chronos Authenticator fact sheet

Free plan	Yes
Paid from	Free
Code type	Totp and hotp
Push approvals	Not verified
Encrypted backup	Yes
Multi-device sync	Yes
Team administration	Not verified
Supported platforms	iOS (iPhone)
Deployment	Mobile
Platforms	iOS
Built for	Solo, Small business (editorial estimate)
Integrations	1 integrations: iCloud
Pricing	Free plan (source)
Website	github.com
Facts checked	22 Sep 2026

Chronos Authenticator integrations

Chronos Authenticator lists 1 integrations on its own site.

iCloud

Alternatives to Chronos Authenticator

See all Chronos Authenticator alternatives →

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Featured on iTechGuides

Chronos Authenticator 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