You can use the Notes app to scan documents on your iPhone or iPad.
Open Notes and select a note or create a new one.
Tap the Camera button , then tap Scan Documents .
Place your document in view of the camera.
If your device is in Auto mode, your document will automatically scan. If you need to manually capture a scan, tap the Shutter button or press one of the Volume buttons. Then drag the corners to adjust the scan to fit the page, then tap Keep Scan.