Compalight

Features

Paste or type text, lock it as the Original, then edit freely. Three tabs show Original, word-level changes, and your edited version.

Every change visualized in color: blue for additions, red for deletions, green for text you moved from one place to another.

Compalight detects when you relocate text (3+ contiguous words) and highlights it in green instead of showing it as delete + insert.

Change your mind? Tap any change in the Changes tab to undo it individually. Full undo/redo support with up to 50 steps.

Photograph text or documents. Compalight runs OCR locally on your device. Clean up common OCR errors automatically if you choose.

Export as plain text, copy to clipboard, or generate a comprehensive Word or PDF file with full redline markup and formatting.

Offline by default: No internet connection required. Edit anywhere, anytime.
No AI: Pure text editing with deterministic algorithms. Your text never leaves your device.
No account: No login, no tracking, no data collection.
One-time purchase: EUR 10 on the App Store. No subscriptions, no in-app purchases.
Multilingual: English, German, French, Spanish, Japanese, Mandarin Chinese.
For everyone: Lawyers, contract managers, HR professionals, students, editors, translators — anyone who marks up text.

Download Compalight from the iOS App Store for EUR 10. One-time purchase, no subscriptions.