Aiko is an AI transcription app from Sindre Sorhus that helps users convert audio into text on macOS, iOS, and visionOS. The app is powered by OpenAI’s Whisper model and runs transcription locally on the user’s device. This on-device approach makes Aiko well suited for private meetings, lectures, interviews, voice notes, and sensitive recordings. On macOS, Aiko uses the Whisper large v2 model, while iOS uses the medium or small model depending on available device memory. The app supports Shortcuts, giving users flexible ways to record, transcribe, copy results, create subtitles, save text, or connect transcripts to other workflows. Users can transcribe from Finder on macOS, record and transcribe from iPhone shortcuts, or build custom workflows that pass transcripts into apps like Notes or ChatGPT. Aiko includes a free 14-day TestFlight trial with full app access and no auto-charges. Older macOS versions are available for users on macOS 13, 14, and 15. By combining local Whisper transcription, Apple platform support, privacy, and Shortcuts automation, Aiko gives users a simple way to turn speech into text.