On the Home screen, tap one of the 5 big cards: Scan with Camera, Sign a PDF, Password Protect, PDF Converter or Extract Text (OCR).
Tap Start and allow the camera when your phone asks. No camera? Tap Choose from gallery to use photos you already took.
Hold the phone flat above the page in good light and tap the round Capture button once per page. When all pages are taken, tap ✔ Done.
Choose Black & white.
Pick a Clean-up style, keep Auto-crop to the paper ticked, then tap Start to build the PDF.
Want to send it right away? Tap Share / WhatsApp instead.