# pwn20wndstuff/Undecimus

unc0ver jailbreak for iOS 11.0 - 12.4

Repository: https://github.com/pwn20wndstuff/Undecimus
Canonical: https://ross.abutalabs.com/products/undecimus
Language: C
License: BSD-3-Clause
License Family: permissive
Last push: 2021-08-01T20:20:34+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 2918, "days_push": 1858, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 6621, forks 1285 (observed 2026-08-28T04:09:45.752802+00:00)

## What it is
Undecimus is the open-source iOS app behind the unc0ver jailbreak, supporting iOS 11.0 through 12.4 on ARM64 devices. It applies kernel and userspace patches to jailbreak the device with full Cydia and Substrate support.

## Use cases
- jailbreak an iPhone or iPad running iOS 11 to 12.4
- install Cydia and Substrate on a stock iOS device
- rejailbreak after a reboot without losing data
- migrate from another jailbreak tool without wiping data
- repair corrupted core jailbreak packages via the built-in APT repo
- run diagnostics on a jailbroken device

## When to choose
- you need to jailbreak iOS 11.0-12.4 on an ARM64 device
- you want a fully open-source jailbreak with no DRM or installation restrictions
- you want native Cydia support and stable kernel patches
- you are migrating from another jailbreak and want to keep your data

## When to avoid
- your device runs iOS 13 or later
- you need a jailbreak for non-ARM64 (pre-A7) devices
- you want a semi-tethered or rootless jailbreak workflow
- you are not comfortable with the risks of jailbreaking, such as bootloops or voided warranty

## Facets
- artifact type: application
- maturity: maintenance
- function: security, reverse-engineering
- domain: security, apple-ecosystem, operating-systems
- platform: -
- tags: jailbreak, ios-jailbreak, unc0ver, cydia, exploit, arm64, ios, mobile

## Member repositories
- pwn20wndstuff/Undecimus (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:45.752802+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 2026-08-29T17:43:18.068528+00:00, confidence not recorded.
  - readme: https://github.com/pwn20wndstuff/Undecimus (fetched 2026-08-28T04:09:45.752802+00:00, sha 7507cbef79a9)
- Data as of 2026-08-30T08:39:29.467469+00:00.