# osy/Jitterbug

Launch JIT enabled iOS app with a second iOS device

Repository: https://github.com/osy/Jitterbug
Canonical: https://ross.abutalabs.com/products/jitterbug
Language: Swift
License: Apache-2.0
License Family: permissive
Archived: true
Last push: 2022-09-14T05:43:51+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 1924, "days_push": 1449, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1559, forks 136 (observed 2026-08-28T04:05:03.649226+00:00)

## What it is
Jitterbug is an iOS app that launches other iOS apps with a debugger attached from a second iOS device over WiFi, enabling JIT compilation on the secondary device. It also supports a self-debugging VPN tunnel mode and includes a pairing utility for desktop platforms.

## Use cases
- enable JIT for sideloaded iOS apps without jailbreaking
- launch an iOS app with debugger from another iPhone or iPad
- debug an iOS device using itself via VPN tunnel
- pair two iOS devices for tethered app launches
- run emulator apps like Delta that need JIT on iOS

## When to choose
- you need JIT-enabled apps on a non-jailbroken iOS device
- you have two iOS devices and want a tethered debug launch
- you want a self-hosted JIT solution without a computer running during use

## When to avoid
- your device is jailbroken and can enable JIT directly
- you need a one-tap consumer app with no pairing setup
- you target modern iOS versions where newer JIT-enabling tools exist

## Facets
- artifact type: application
- maturity: maintenance
- function: networking, developer-tools
- domain: developer-tools, mobile-development, apple-ecosystem
- platform: windows, cli
- tags: jit, ios-app-launcher, libimobiledevice, vpn-tunnel, sideloading, swift, debugging, ios, macos, linux

## Member repositories
- osy/Jitterbug (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:03.649226+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 2026-08-30T04:29:51.629817+00:00, confidence not recorded.
  - readme: https://github.com/osy/Jitterbug (fetched 2026-08-28T04:05:03.649226+00:00, sha 29361ffd9cc2)
- Data as of 2026-08-30T08:39:29.467469+00:00.