ACE Scanner - PDF Scanner App

Scan paper documents with your phone

ACE Scanner - PDF Scanner App turns an Android phone camera into a document scanning tool for receipts, notes, business cards and other paperwork. It is suited to students, office workers, small businesses and anyone who needs digital copies without using a dedicated scanner. The app can capture documents, improve their appearance and save them as PDFs for later use.

Document capture and editing

The scanner uses edge detection and automatic cropping to help frame pages correctly. After capture, users can adjust the document with image filters such as black and white or photo mode. Page tools allow documents to be added to, rearranged or deleted, while layout options support common paper formats including A4 and Legal.

PDF tools and text recognition

ACE Scanner also provides a PDF reader and file-management features for organizing saved documents. Files can be renamed, sorted and searched within the app. Its OCR function recognizes text in scanned pages, making content easier to copy, edit or find than a standard image scan. Digital signatures and watermarks are available for documents that need approval, identification or added protection.

Usage and overall standing

With a 4.45 rating from 398,780 reviews and more than 50 million installs, ACE Scanner is a widely used productivity app. It is developed by QR Code Scanner. The feature set covers the main steps of a mobile document workflow—from taking a clear scan to preparing, searching and sharing a PDF—so it fits users who want several document utilities in one app rather than a camera-only scanner.