# Meituan-Dianping/Logan

Logan is a lightweight case logging system based on mobile platform.

Repository: https://github.com/Meituan-Dianping/Logan
Canonical: https://ross.abutalabs.com/products/logan
Homepage: https://tech.meituan.com/logan_open_source.html
Language: C
License: MIT
License Family: permissive
Last push: 2026-01-02T06:05:06+00:00

## Health v2 (maintenance only)
Score: 50/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 60, release rhythm 10, longevity 100
- inputs: {"age_days": 2899, "days_push": 243, "days_rel": 390, "gap_med": null, "n_releases_24m": 1}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 6010, forks 902 (observed 2026-08-28T04:09:34.247659+00:00)

## What it is
Logan is a lightweight logging platform from Meituan-Dianping that collects, stores, uploads, and analyzes front-end logs on mobile and web platforms. It ships as iOS, Android, and Web SDKs built on a C core, plus a server SDK and LoganSite web UI for log search and visualization.

## Use cases
- collect logs from ios and android apps
- upload mobile crash and diagnostic logs to a server
- search and analyze front-end logs in a web dashboard
- capture browser and h5 page logs
- integrate logging into a flutter app
- self-host a log collection and analysis platform

## When to choose
- you need efficient structured logging on mobile with a small footprint
- you want an end-to-end log pipeline from client SDKs to a searchable web UI
- you need cross-platform logging including web and flutter

## When to avoid
- you only need server-side or backend logging
- you want a managed cloud logging service rather than self-hosting
- your project requires a mature ecosystem beyond mobile and web clients

## Facets
- artifact type: library
- maturity: active
- function: logging, sdk, search-engine, data-visualization
- domain: mobile-development, developer-tools, monitoring, web-development
- platform: browser, self-hosted, cross-platform
- tags: mobile-logging, log-collection, log-analysis, flutter-plugin, c-core, front-end-logs, android, ios, nodejs

## Member repositories
- Meituan-Dianping/Logan (main) score 50

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:34.247659+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 2026-08-29T17:49:47.347733+00:00, confidence not recorded.
  - readme: https://github.com/Meituan-Dianping/Logan (fetched 2026-08-28T04:09:34.247659+00:00, sha 7d0c3f7810aa)
  - homepage: https://tech.meituan.com/logan_open_source.html (fetched 2026-08-29T08:45:46.718898+00:00, sha b0a4bc67b3e9)
  - site_page: https://tech.meituan.com/about.html (fetched 2026-08-29T08:45:46.728686+00:00, sha 6526db42300f)
- Data as of 2026-08-30T08:39:29.467469+00:00.