Backup/export chat history to pdf (demo) description

This is the *DEMO* of the pro version. Please get the pro version from: https://play.google.com/store/apps/details?id=com.playwfd.chat2pdf_pro

Chat2pdf provides a way to export/backup chat history to PDF/JPEG (the chat app could be whatsapp/wechat/qq/line etc). It uses screen record + image processing to save the chat history into PDF file or long JPEG image.

Basic usage:
1. click record button and start to record chat history
2. After record, click "Convert PDF"/Convert JPEG" button to convert the screen record to PDF document or long picture/JPEG file.
3. View/share the generated PDF/JPEG.

Besides chat history export, it also can be used to export screen content, e.g. webpage to PDF file