# stratumauth/app

📱 Two-Factor Authentication (2FA) client for Android + Wear OS

Repository: https://github.com/stratumauth/app
Canonical: https://ross.abutalabs.com/products/stratumauth-app
Homepage: https://stratumauth.com
Language: C#
License: GPL-3.0
License Family: copyleft
Topics: android, two-factor-authentication, xamarin-android, c-sharp, hotp, totp, tfa, material-design, wear-os, wearos, authenticator, 2fa, motp, steam, xamarin, material-you, otp
Last push: 2026-08-26T12:08:30+00:00

## Health v2 (maintenance only)
Score: 94/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 83, longevity 100
- inputs: {"age_days": 2941, "days_push": 7, "days_rel": 117, "gap_med": 22.0, "n_releases_24m": 15}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 4555, forks 276 (observed 2026-08-28T04:08:53.363551+00:00)

## What it is
Stratum (formerly Authenticator Pro) is a free, open-source two-factor authentication app for Android with a Wear OS companion. It supports TOTP, HOTP, mOTP, Steam, and Yandex codes, with encrypted backups, icons, categories, and offline operation.

## Use cases
- generate 2FA codes on Android
- migrate authenticator accounts from Google Authenticator or Authy
- back up and restore two-factor tokens with encryption
- view 2FA codes from a Wear OS watch
- manage one-time passwords offline without internet access

## When to choose
- you want a privacy-focused, offline 2FA app with no data lock-in
- you need encrypted backups and easy import/export of tokens
- you want Wear OS support for your authenticator
- you prefer open-source, auditable security software

## When to avoid
- you need an iOS or desktop authenticator
- you require cloud-synced 2FA across many devices out of the box
- you need push-based or FIDO2/WebAuthn authentication

## Facets
- artifact type: application
- maturity: active
- function: auth, security, cryptography
- domain: security, privacy, android-tools, mobile-development
- platform: -
- tags: totp, hotp, 2fa, authenticator, wear-os, otp, material-design, encrypted-backups, open-source, android, mobile

## Member repositories
- stratumauth/app (main) score 94

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:53.363551+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:20:02.951889+00:00, confidence not recorded.
  - readme: https://github.com/stratumauth/app (fetched 2026-08-28T04:08:53.363551+00:00, sha ae23b13f8ca2)
  - homepage: https://stratumauth.com (fetched 2026-08-29T09:05:34.424361+00:00, sha b3db3f127359)
- Data as of 2026-08-30T08:39:29.467469+00:00.