# mit-cml/appinventor-sources

MIT App Inventor Public Open Source

Repository: https://github.com/mit-cml/appinventor-sources
Canonical: https://ross.abutalabs.com/products/appinventor-sources
Homepage: http://appinventor.mit.edu/appinventor-sources/
Language: Java
License: Apache-2.0
License Family: permissive
Last push: 2026-08-26T18:11:43+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 35, longevity 100
- inputs: {"age_days": 5182, "days_push": 7, "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 1733, forks 2327 (observed 2026-08-28T04:05:28.893777+00:00)

## What it is
MIT App Inventor is a visual, block-based programming platform that lets users build Android applications without writing traditional code. This repository contains the open-source server and client sources for those who want to self-host their own App Inventor instance or contribute components and features to the project.

## Use cases
- build android apps without coding
- self-host my own app inventor instance
- teach programming to beginners with blocks
- contribute a new component to app inventor
- run a private instance of app inventor for my school
- develop custom app inventor extensions

## When to choose
- you just want to build App Inventor apps - use the free hosted instance at appinventor.mit.edu instead
- you need a lightweight tool - the build requires Java 11, Ant, and the Google Cloud SDK
- you are looking for a general-purpose Android IDE - App Inventor is block-based and not a replacement for Android Studio

## Facets
- artifact type: application
- maturity: active
- function: mobile-framework, gui, web-framework, developer-tools
- domain: mobile-development, education, web-development, developer-tools
- platform: jvm, cloud, cross-platform
- tags: visual-programming, block-based-programming, app-builder, no-code, low-code, google-app-engine, android-development, education-tool, self-hosting, open-source-platform, android, web-server

## Member repositories
- mit-cml/appinventor-sources (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:28.893777+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 2026-08-30T03:31:27.839388+00:00, confidence not recorded.
  - readme: https://github.com/mit-cml/appinventor-sources (fetched 2026-08-28T04:05:28.893777+00:00, sha c4571e9855ef)
  - homepage: http://appinventor.mit.edu/appinventor-sources/ (fetched 2026-08-29T11:08:13.111453+00:00, sha 88641638d152)
- Data as of 2026-08-30T08:39:29.467469+00:00.