# isar/isar

Extremely fast, easy to use, and fully async NoSQL database for Flutter

Repository: https://github.com/isar/isar
Canonical: https://ross.abutalabs.com/products/isar
Homepage: https://isar.dev
Language: Dart
License: Apache-2.0
License Family: permissive
Topics: flutter, dart, database, cross-platform, ios, android, web, isar
Last push: 2025-06-14T08:12:25+00:00

## Health v2 (maintenance only)
Score: 34/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 26, release rhythm 8, longevity 100
- inputs: {"age_days": 2275, "days_push": 445, "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 4027, forks 600 (observed 2026-08-28T04:08:32.671759+00:00)

## What it is
Isar is an extremely fast, fully asynchronous NoSQL database library for Flutter and Dart. It supports cross-platform persistence on iOS, Android, desktop, and web with statically typed queries, indexes, full-text search, and ACID transactions.

## Use cases
- store local data offline in a flutter app
- fast nosql database for dart
- full-text search over local records
- query data asynchronously across isolates
- persist structured objects with type-safe queries
- cross-platform mobile database with ACID transactions

## When to choose
- you are building a Flutter app needing fast local persistence
- you want statically typed, compile-time-checked queries
- you need built-in full-text search and multi-entry indexes
- you need async, multi-isolate database access out of the box

## When to avoid
- you need a relational database with SQL joins
- your backend is not Dart/Flutter
- you need a server-side or shared multi-client database
- you require mature tooling beyond the Dart ecosystem

## Facets
- artifact type: library
- maturity: active
- function: database, search-engine, orm
- domain: databases, mobile-development, cross-platform, web-development
- platform: cross-platform
- tags: flutter, nosql, full-text-search, acid, code-generation, async, android, ios, web-server

## Member repositories
- isar/isar (main) score 34

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:32.671759+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 2026-08-29T18:23:53.160134+00:00, confidence not recorded.
  - readme: https://github.com/isar/isar (fetched 2026-08-28T04:08:32.671759+00:00, sha e69b3925547c)
  - homepage: https://isar.dev (fetched 2026-08-29T09:16:31.443610+00:00, sha 08e04ea01c54)
  - site_page: https://isar.dev/tutorials/quickstart.html (fetched 2026-08-29T09:16:31.452803+00:00, sha b57309b4ebcb)
- Data as of 2026-08-30T08:39:29.467469+00:00.