On-device translation · iPhone, iPad, Mac Ready

Your timeline, in your language.

Native client for federated networks on iPhone, iPad and Mac with built-in post translation. Read your timeline without language getting in the way. Free, private and ad-free.

Download on the App Store See features
Federated API
Swift
Translation API
On-device
Federated API
Swift
Translation API
On-device

Built-in translation

Translate posts right in your timeline without leaving the app. Translation runs on your device using Apple's technology.

Turn on automatic translation to translate as posts load, or tap “Translate” on any post on demand. Your content never leaves your iPhone.

import Translation

struct PostTranslator {

let session = TranslationSession(target: .english)

func translate(_ post: Post) async {

let result = try await session.translate(post.text)

// On-device. No servers involved.

post.show(result.targetText)

}

}

Translation status

On-device

AutomaticAs the timeline loads
ON
ManualOn demand
1 TAP
LanguagesConfigurable target
Offline

Real privacy

No servers of our own, no analytics, no ads. Your instance session is stored in the iOS Keychain and translations are processed locally.

Read the Privacy Policy

Native experience

Built with Swift and SwiftUI. A familiar interface, optimized performance on iPhone, iPad and Mac, and the natural gestures of each platform.

MASTODON

THE APP

Your timeline, without barriers.

Home, federated and local timelines. Reply, boost, favorite and bookmark posts. All with built-in translation.

9:41

Timeline

Home

Naomi 🇯🇵
@naomi@social.example

The sunset in Tokyo was beautiful today. The whole city looked golden.

Translated from Japanese
Léa 🇫🇷
@lea@social.example

Just finished the book. I can't stop thinking about the ending.

Translated from French
Mark 🇬🇧
@mark@social.example

Finally a social client that translates posts on its own. This changes everything.

Translation

Processed on device

Cloud
0%
Local
100%

Free and ad-free

No in-app purchases

Features

Everything in one client

Designed for reading federated networks without language barriers, with built-in translation and a native experience on iPhone, iPad and Mac.

On-device translation

Translate posts with Apple's technology right on your device. The dictionary downloads once and then works offline.

Timelines and feeds

Your Home, local and federated timelines, plus account lists. Your reading position is saved automatically.

Full interaction

Reply, boost, favorite and save to bookmarks. Quick swipe actions you can configure.

Personalization

Light, dark, dim and automatic themes. Set the accent color, text size and typeface to your liking.

Media content

Full support for images, native video, link card previews and translatable alt text.

Notifications

Get and filter activity alerts, mentions, favorites and boosts right on your device.

Your timeline in your language

Download Colossus for free and read federated networks without language barriers.

Developed in Spain 🇪🇸. Built on open, federated protocols.

Download on the App Store