Scan Hero: PDF Scanner

The app scans documents through the camera, automatically processes images and saves them as JPEG or PDF, supports OCR for Russian and other languages (with Cyrillic limitations), cloud synchronization and export to various services via subscription.

The app scans documents from a smartphone camera into PDF/JPEG with basic processing (brightness adjustment, cropping, filters), but recent versions have included intrusive advertising that makes the app often unusable.

TapScanner is a document scanning app that converts documents to PDF with OCR support, editing, and cloud synchronization, but requires a paid subscription even for basic use.

Free app for scanning documents with smartphone camera, featuring automatic perspective correction, shadow removal, and saving to PDF/JPG. Includes OCR for 18 languages.

Android app for editing and signing PDF documents: fill forms, draw signatures, import from cloud services and export via email.

Clear Scan is a free document scanning app for smartphones with OCR and cloud service support that accurately detects document edges and saves to PDF without watermarks, but frustrates users with intrusive advertising.

App for creating and editing handwritten and text notes with support for PDF annotations, audio recordings, and cloud synchronization, but with serious data loss issues after updates.

Adobe Acrobat Reader is a PDF viewer with support for comments, signatures, and basic editing (in premium); operates in Russia with restrictions, requires registration and payment, with intrusive feature advertising.