Letterly is built for people who would rather talk than type. You open the app and record, or speak directly into Gmail, Slack or Notion through the system dictation layer, and Letterly returns polished text matched to the format you need — a message, an email, a note, a journal entry or a social post. Rewrites are handled by AI: pick a ready-made style such as a formal email or a concise meeting recap, or describe your own format and reuse it later.
Longer recordings get more structure. Letterly handles talks up to about 90 minutes and can split a meeting or lecture transcript by speaker, then produce a summary alongside the full text. Recordings and rewrites are unlimited on the platform, audio and video files can be uploaded for transcription from any device, and notes can be searched by keyword or organized with tags. Offline recording means ideas captured without a connection still arrive in your library.
Letterly is available as a native app for iOS, Android, macOS and Windows plus a web client, with sync across devices. It connects outward too: translations into 90+ languages, text replacements for frequently used phrases, custom vocabularies, Zapier and webhook integrations, Apple Watch recording, and an MCP server that lets assistants like Claude or ChatGPT read and manage your notes. The company states that user content is not used to train AI models.
