Zella is an on-device screen recorder and AI video editor for Mac and iPhone that runs entirely on your local hardware with no cloud uploads required. It automatically removes silences and filler words, generates captions, cleans up voice audio, and adds music in a single tap via its Auto-Polish feature. Zella includes a full timeline editor, background removal, color grading, and one-click reframing for social platforms. The core editor and all AI features are free forever with no watermark, and a one-time $89 purchase lifts the two-minute and 1080p export caps for both Mac and iPhone.