# thunderbird/thunderbird-ios

Thunderbird for iOS – Open Source Email App for iOS

Repository: https://github.com/thunderbird/thunderbird-ios
Canonical: https://ross.abutalabs.com/products/thunderbird-ios
Language: Swift
License: MPL-2.0
License Family: copyleft
Last push: 2026-09-02T07:27:06+00:00

## Health v2 (maintenance only)
Score: 66/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 100, release rhythm 35, longevity 42
- inputs: {"age_days": 590, "days_push": 0, "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 1171, forks 41 (observed 2026-09-03T02:15:18.646425+00:00)

## What it is
Thunderbird for iOS is an open-source email client for iOS devices, developed from the ground up by the Thunderbird/Mozilla community. It is currently in an early stage of development and not yet functional for production use.

## Use cases
- read and write email on iPhone or iPad
- manage multiple email accounts on iOS
- use a private, open-source alternative to Apple Mail
- triage email efficiently on mobile
- integrate email with Thunderbird desktop
- contribute to an open-source mobile email app

## When to choose
- you want a free, open-source, privacy-respecting email client on iOS
- you are already a Thunderbird desktop user wanting mobile integration
- you want to follow or contribute to early development of a new email app

## When to avoid
- you need a fully functional, production-ready email client today
- you need Android support (this is iOS only)
- you want a stable app to rely on for daily email

## Facets
- artifact type: application
- maturity: experimental
- function: email
- domain: developer-tools, privacy, mobile-development
- platform: -
- tags: email-client, thunderbird, mozilla, open-source, ios, swift, mobile

## Member repositories
- thunderbird/thunderbird-ios (main) score 66

## Provenance
- Observed fields: from GitHub, fetched 2026-09-03T02:15:18.646425+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 2026-08-30T06:33:37.735361+00:00, confidence not recorded.
  - readme: https://github.com/thunderbird/thunderbird-ios (fetched 2026-09-03T02:15:18.646425+00:00, sha 04bd7f91ebd0)
- Data as of 2026-08-30T08:39:29.467469+00:00.