A camera photo and an OCR document scan are different tools. A photo preserves the image; a scanner extracts the text. Which one you need depends on what you will do with the document later.
When a plain photo is enough
- You only need to keep the visual copy (a receipt image for a photo album, a whiteboard for reference).
- Search and copy are not required.
- The file will live in the gallery and you will not look it up by text.
When OCR scanning earns its place
- You need searchable text: expense reports, invoices, contracts, study material.
- You want to copy amounts or names instead of retyping them.
- You archive many documents and want them findable later.
On-device vs cloud
Cloud scanners upload your photo to a server. On-device OCR keeps the photo and the text on your phone, which matters for receipts, IDs and medical paperwork. Recognition is not perfect; verify important text.
An app I built for this
Private Text Scanner is an offline OCR app for Android: free daily allowance, rewarded ads for extra scans, and a one-time purchase for unlimited scanning (no subscription). No account required; recognition runs on the device. I am the developer of Private Text Scanner.
This guide compares workflows; it does not guarantee OCR accuracy.