Personally I avoid CamScammer. Their business practices are extremely suspect, they have been riddled with Malware and have predatory subscription services IMO
https://www.pcmag.com/news/malware-d...app-camscanner
https://lifehacker.com/free-document...ont-1782291649
On iPhone, I love Scannable by Evernote (no account required).
On Android, I've used:
- MS Office Lens
- Google Drive's built in document scanner
Initially Office lens could not create multi-page PDFs but now it can. The Google Drive option is excellent, especially if you use Google drive as a repository for your scans.