# ProtonMail/ios-mail

Secure email that protects your privacy

Repository: https://github.com/ProtonMail/ios-mail
Canonical: https://ross.abutalabs.com/products/ios-mail
Homepage: http://proton.me
Language: Swift
License Family: other
Last push: 2026-05-08T11:05:58+00:00

## Health v2 (maintenance only)
Score: 66/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 81, release rhythm 28, longevity 100
- inputs: {"age_days": 2501, "days_push": 117, "days_rel": 412, "gap_med": 43.5, "n_releases_24m": 9}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1613, forks 241 (observed 2026-08-28T04:05:11.151634+00:00)

## What it is
Proton Mail's official iOS client for end-to-end encrypted email, written in Swift/SwiftUI with core business logic in a Rust-based SDK. The repository is published for transparency and currently cannot be built from source externally due to internal SDK distribution.

## Use cases
- send and receive end-to-end encrypted email on iPhone
- access a privacy-focused email client on iOS
- review how a production encrypted mail client is architected
- study SwiftUI and Rust SDK integration patterns in a large app
- audit the iOS client code of Proton Mail

## When to choose
- you want transparency into Proton Mail's iOS development and architecture
- you are studying how Swift apps bind to Rust core logic
- you want to inspect the UI layer of an encrypted email client

## When to avoid
- you want to build, fork, or contribute to the app — it cannot be built externally and contributions are not accepted
- you need a fully open-source, self-hostable email client
- you need an email client for platforms other than iOS

## Facets
- artifact type: application
- maturity: active
- function: email, cryptography, security
- domain: email, privacy, security, mobile-development
- platform: -
- tags: encrypted-email, swiftui, rust-sdk, proton, open-source-client, not-buildable-externally, ios, swift

## Member repositories
- ProtonMail/ios-mail (main) score 66

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:11.151634+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 2026-08-30T03:51:05.119629+00:00, confidence not recorded.
  - readme: https://github.com/ProtonMail/ios-mail (fetched 2026-08-28T04:05:11.151634+00:00, sha 72f549789092)
  - homepage: http://proton.me (fetched 2026-08-29T11:23:05.621076+00:00, sha 4a1b88f11404)
  - site_page: https://proton.me/drive/docs (fetched 2026-08-29T11:23:05.632517+00:00, sha ec407265ea8f)
  - site_page: https://proton.me/business/drive/docs (fetched 2026-08-29T11:23:05.634137+00:00, sha 249d8161fd88)
  - site_page: https://proton.me/about (fetched 2026-08-29T11:23:05.635581+00:00, sha 808ff0f26888)
  - site_page: https://proton.me/about/impact (fetched 2026-08-29T11:23:05.636985+00:00, sha 3a7a852af56d)
  - site_page: https://proton.me/about/team (fetched 2026-08-29T11:23:05.638725+00:00, sha 62b6b07abe2f)
  - site_page: https://lumo.proton.me/about (fetched 2026-08-29T11:23:05.642185+00:00, sha b18c2149465e)
  - site_page: https://proton.me/pricing (fetched 2026-08-29T11:23:05.630456+00:00, sha 20b6d93bb792)
  - site_page: https://proton.me/learn/encryption (fetched 2026-08-29T11:23:05.640328+00:00, sha 4ceb170c57e5)
- Data as of 2026-08-30T08:39:29.467469+00:00.