CamScanner pioneered the mobile document scanning category and remains one of the most feature-rich options available, with over 750 million users globally. The automatic edge detection and perspective correction work reliably well, producing clean, readable scans from smartphone cameras. OCR support across 60+ languages is genuinely impressive and makes scanned documents searchable and editable. The feature set is extensive -- batch scanning, PDF merging and splitting, annotation tools, and document signing cover most office productivity needs. Cloud integration with major services like Google Drive and Dropbox streamlines workflows. However, the app's history includes a 2019 malware incident that damaged trust, and the freemium model means ads and watermarks on free scans can be frustrating. Privacy concerns around data handling given the Chinese developer also give some users pause. For pure scanning capability it excels, but users handling sensitive documents may prefer alternatives with clearer privacy credentials.