# omadahealth/LolliPin

A Material design Android pincode library. Supports Fingerprint.

Repository: https://github.com/omadahealth/LolliPin
Canonical: https://ross.abutalabs.com/products/lollipin
Language: Java
License: MIT
License Family: permissive
Archived: true
Last push: 2022-04-04T19:24:45+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 4251, "days_push": 1612, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1590, forks 418 (observed 2026-08-28T04:05:08.490940+00:00)

## What it is
LolliPin is a Material design styled Android library that adds PIN code lock protection to apps, storing only a SHA-1 hash of the PIN. It also supports fingerprint unlocking via the Google Fingerprint API and lets developers customize lock behavior by extending AppLockActivity.

## Use cases
- add a pin code lock screen to my android app
- require a pin before opening protected activities
- let users unlock my app with their fingerprint
- implement material design pin entry screen
- store pin codes securely without saving plaintext
- customize what happens when the user forgets their pin

## When to choose
- you need a ready-made, material-styled PIN lock for an Android app
- you want optional fingerprint unlock alongside a PIN
- you want to protect only specific activities rather than the whole device

## When to avoid
- you need modern Android BiometricPrompt APIs or passkey support
- you target only recent Android versions and want an actively developed solution
- you need iOS or cross-platform lock screens

## Facets
- artifact type: library
- maturity: maintenance
- function: security, auth, ui-components
- domain: mobile-development, security, android-tools
- platform: -
- tags: pincode, fingerprint, material-design, app-lock, biometric-authentication, android, mobile

## Member repositories
- omadahealth/LolliPin (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:08.490940+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 2026-08-30T03:54:48.008531+00:00, confidence not recorded.
  - readme: https://github.com/omadahealth/LolliPin (fetched 2026-08-28T04:05:08.490940+00:00, sha 961f6dbbc634)
- Data as of 2026-08-30T08:39:29.467469+00:00.