Data Extraction from Unique File Type

I need to extract user-readable text data from a unique file type. This file comes from a discontinued Android app (called Private Diary) and is organized in plain paragraphs. The extracted text (i.e. my journal entries) should be returned as plain text... (Budget: ₹12500 - ₹37500 INR, Jobs: Android, Data Analysis, Data Collection, Data Entry, Data Extraction, Data Integration, Data Management, Data Processing, Mobile App Development)