# gekitz/UIDevice-with-UniqueIdentifier-for-iOS-5

Brings back the unique identifier support under iOS 5, it uses the device's mac address in combination with the bundle identifier to generate a new hashed unique identifier.

Repository: https://github.com/gekitz/UIDevice-with-UniqueIdentifier-for-iOS-5
Canonical: https://ross.abutalabs.com/products/uidevice-with-uniqueidentifier-for-ios-5
Language: Objective-C
License: MIT
License Family: permissive
Last push: 2013-07-18T13:55:27+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 5492, "days_push": 4794, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1231, forks 224 (observed 2026-08-28T04:04:04.225178+00:00)

## What it is
An Objective-C category on UIDevice that restores unique device identifier support on iOS 5 by hashing the device MAC address (optionally combined with the bundle identifier). It was a workaround after Apple deprecated UDID access.

## Use cases
- generate a unique device identifier on ios 5
- track users across apps via a global device hash
- replace deprecated udid in objective-c apps
- hash mac address with bundle id for per-app device id

## When to choose
- maintaining a legacy iOS 5-era app that still needs a UDID replacement

## When to avoid
- any app targeting iOS 7 or later, where it no longer works
- new projects needing privacy-compliant device identification (use identifierForVendor instead)
- App Store submissions, since MAC address access is restricted

## Facets
- artifact type: library
- maturity: abandoned
- function: security, sdk
- domain: mobile-development, privacy, apple-ecosystem
- platform: -
- tags: objective-c, udid, device-identifier, mac-address, ios5, deprecated, ios, mobile

## Member repositories
- gekitz/UIDevice-with-UniqueIdentifier-for-iOS-5 (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:04.225178+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 2026-08-30T08:22:30.068656+00:00, confidence not recorded.
  - readme: https://github.com/gekitz/UIDevice-with-UniqueIdentifier-for-iOS-5 (fetched 2026-08-28T04:04:04.225178+00:00, sha f6b8071ffa3c)
- Data as of 2026-08-30T08:39:29.467469+00:00.