Dictation that works offline on a Mac

Most voice tools stop dead without a connection. If you work on planes, in basements, or on hotel Wi-Fi, that's not a small detail.

Written by the Bellow team

Why most dictation apps need the internet

Speech recognition used to be too heavy for a laptop, so the industry standard became: capture audio, upload it, transcribe on a server, send text back. It works well and runs on any hardware.

It also means the tool is only as available as your connection. No Wi-Fi, no dictation. Bad Wi-Fi, slow dictation. Captive-portal hotel Wi-Fi that hijacks requests, and you get errors nobody can explain.

What changed

Apple Silicon includes a Neural Engine built for exactly this kind of workload. Whisper-class models now run locally, fast enough that on-device transcription is typically quicker than the round trip to a server - there's no upload, no queue, no download.

Where offline actually bites

• Flights. The single best block of focused writing time most people get, and cloud tools are useless for it.
• Trains and commutes. Connections that drop every few minutes are worse than none - you get partial failures and lost text.
• Hotel and conference Wi-Fi. Congested, filtered, sometimes hostile to API calls.
• Secure environments. Plenty of workplaces restrict what may leave the network. An offline tool sidesteps the question.
• Rural and travel connectivity. Anywhere bandwidth is metered or scarce.

The one trade-off, stated plainly

Working offline means the speech model has to be on your machine, and good models are big. Bellow's installer is about 1.5 GB, nearly all of it the model. That's the honest cost of never needing a server.

There's also a one-time setup on first launch: macOS compiles the model for your specific Neural Engine. It takes a few minutes and Bellow shows a progress screen while it happens. After that, launches take seconds and transcription is sub-second.

How Bellow handles it

The model ships inside the app, so there's no download step and no first-run internet requirement. You can install Bellow on a machine that has never been online and it will transcribe. There is no degraded offline mode, because there's no online mode to degrade from - local is the only path the app has.