You keep rewriting the same text by hand
Messages, emails, docs, comments, tickets, product copy, support responses. The work repeats, but the apps keep changing.
Fluent App
For people who translate and rewrite all day
Translate and improve text in any app without breaking your flow.
Fluent App is built for the annoying part of modern writing work: translating messages, fixing grammar, improving tone, rewriting copy, and summarizing text across different apps all day long. Instead of leaving the app you are in, you select text, press a shortcut, and get the result right there.
Works across apps Translation and writing shortcuts Use your own API keys Open source macOS 13+
Product demo
Translate first, then improve the result in place
Select
Highlight text directly inside Mail.
Translate
Run a shortcut and replace the text instantly.
Improve
Use another shortcut to polish the new version.
You lose time copy-pasting into AI tools
Select text, copy, open another window, paste, ask, copy again, come back, paste again. It breaks concentration every time.
You want the result where you are already working
The useful part is not just AI. It is getting translation or improved writing directly inside the current app with one shortcut.
Why it is useful
Made for real text work, not just AI demos.
Translate without switching apps
Select text in Mail, Slack, Notes, Docs, Figma, Safari, or your editor and translate it right there instead of bouncing to ChatGPT or DeepL.
Improve writing in one shortcut
Fix grammar, make text clearer, change tone, or rewrite something to sound more polished while keeping your flow.
Works inside the apps you already use
The point is convenience. Fluent App works on top of the app you are already in, so you do not have to copy, open another tool, paste, and come back.
Expandable beyond translation
Create shortcuts for summaries, professional rewrites, language changes, cleanup, or any repeated text task you want to automate.
How it works
Three steps, inside the app you are already using.
01
Select any text
Highlight text in whatever app you are using at the moment.
02
Trigger a shortcut
Use a built-in action like Translate or Improve Writing, or create your own.
03
Get the new text in place
Fluent App sends the text to your chosen model and pastes the result back into the same spot.
Shortcuts
Start with translation and writing help, then expand from there.
Cmd Shift O
Translate
Detect the language and translate the selection cleanly.
Cmd Shift I
Improve Writing
Rewrite for clarity, grammar, and tone while keeping the same language.
Cmd Shift S
Summarize
Condense selected text into concise output using your own prompt style.
Download
Install it and use it where you already work.
Fluent App is for people who repeatedly translate and improve text across apps and want that friction gone. Download the latest macOS build directly from GitHub Releases.
Open source
Public, inspectable, and ready to extend.
Open repository
The complete app, release scripts, and website are public on GitHub and easy to inspect or fork.
View repositoryAutomated releases
GitHub Actions build the app, generate release artifacts, and support signing plus notarization for public distribution.
View workflowsMIT licensed
Use Fluent App as-is, adapt it for your own team, or ship your own variant without hidden platform lock-in.
Read license