Short answer
iPhone has a built-in document scanner in both the Notes app (tap the attachment icon → Scan Documents) and the Files app (tap ··· → Scan Documents), available since iOS 11 and updated through iOS 26. A good scan requires three steps that quality apps perform automatically: edge/rectangle detection to find the document boundary, perspective correction (de-skew) to flatten a tilted shot, and a contrast filter to make text legible against the background. Dedicated scanner apps go further, offering finer controls over resolution, file naming, multi-format export, and OCR — features Apple's built-in scanner does not provide.
ScanTo Pro does this on your iPhone: it scans to a clean PDF, runs on-device OCR, and can lock files with Face ID — a pay-once app with no subscription. Check the App Store listing for current features.
What to look for before choosing
- Use Notes or Files for free, native multi-page scanning — no third-party app required
- Auto-mode detects edges and shoots automatically; manual mode lets you drag corners to adjust crop
- Edge detection uses Apple's Vision framework (VNDetectRectanglesRequest) to find the document rectangle
- Perspective correction flattens a tilted or angled shot into a top-down-looking scan
- Dedicated scanner apps add OCR, resolution controls, and richer export options the built-in tool lacks
A practical decision process
- Use Notes or Files for free, native multi-page scanning — no third-party app required.
- Auto-mode detects edges and shoots automatically; manual mode lets you drag corners to adjust crop.
- Edge detection uses Apple's Vision framework (VNDetectRectanglesRequest) to find the document rectangle.
- Perspective correction flattens a tilted or angled shot into a top-down-looking scan.
- Dedicated scanner apps add OCR, resolution controls, and richer export options the built-in tool lacks.
Quick comparison
| Need | What to check | Why it matters |
|---|---|---|
| Pricing model | Check whether useful features require a subscription, a one-time unlock, or neither. | The cheapest app on day one may not be cheapest after a year. |
| Privacy model | Prefer on-device work when the content is sensitive. | Private documents, resumes, study data, and family content deserve careful handling. |
| Export / lock-in | Confirm file formats, sharing, backup, and deletion controls. | A good app should help you finish the task, not trap your work. |
Where ScanTo Pro fits
ScanTo Pro is a strong fit when you want private, on-device scanning without a subscription.
Pay onceNo subscriptionOn-device
This page is an independent buying guide. App Store features and prices can change, so confirm details on the listing before purchase.