Synapse: AI Voice Notes

Speak, and Synapse turns what you say into an organized note with a title, a summary and a list of action items. Everything happens on your iPhone: your voice is never sent to a server. Built for people who handle sensitive information, like lawyers, doctors, journalists and executives, and for anyone who would rather keep their ideas in their pocket. TRULY PRIVATE • Transcription and AI run on your device. No servers, no cloud, no account. • Works in Airplane Mode, on the subway or in the mountains. • We collect no data: no analytics, no ads. HOW IT WORKS • Tap and talk: a quick idea or a whole meeting. • When you stop, your device's AI organizes the text: it adds a title, writes a summary and pulls out the action items. • Check off tasks, copy the note as Markdown or share it. TURN VOICE MESSAGES INTO NOTES • Got a long voice message on WhatsApp or Telegram, or a recording in Files? Share it to Synapse and get a transcript, a summary and action items in seconds. • The audio is processed on your iPhone and is never uploaded. FOR EVERY MOMENT • Apple Watch: capture an idea from your wrist. • CarPlay: dictate an idea from your car's screen and see your recent notes. • iPad: review and organize your notes on a bigger screen. NO SIGN-UP • No email, no password, no credit card. • No note limit: only your device's storage. UPFRONT ABOUT HOW IT WORKS • On first launch, Synapse asks before downloading its speech recognition model (Nemotron 3.5 by NVIDIA, about 665 MB). It downloads once; after that everything works offline. • Titles, summaries and action items come from Apple Intelligence, built into the system. Synapse requires a device that supports Apple Intelligence (iPhone 15 Pro or later, or an iPad with Apple Intelligence) with Apple Intelligence turned on. From a thought to an organized note, without anyone else reading it.