Evernote Scannable

Mobile app for reading, editing and converting PDF files with document scanning via camera, CamScanner synchronization and support for multiple formats.

Digital note-taking and PDF annotation application with an AI assistant, designed for students, professionals, and creative individuals. In practice, it is a working tool for handwritten notes and document annotation, but with stability issues, limitations in the free version, and crashes on certain devices.

Google Drive is a cloud storage service with cross-device synchronization, collaborative editing, document scanning, and offline access; however, it has experienced instability after updates, resulting in lost functionality and upload issues.

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.

Adobe Scan is a mobile document scanner with OCR that automatically recognizes text and converts photos to PDF files; functionality is limited without a paid subscription, including export and document merging features.

Cloud file storage with automatic photo and video upload, document scanning, and device synchronization, but with limitations in the free version (2 GB) and accessibility issues in Russia.

MEGA is a cloud storage service with end-to-end encryption, file synchronization across devices, and integrated encrypted chats and video calls. In practice, it suffers from frequent upload failures, data loss on inactive accounts, and download limitations.

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.