Android 4 Loop Recorder-Player – Reuse Old Cellphone
What Apps and Versions you need in order to reuse and convert your old Android 4 cellphone to Android 4 Loop Recorder-Player and the full usage guide
Guides
Adding Text to PDF with Adobe Acrobat Reader DC – Guide
How to Add text to PDF with “Fill and Sign” feature tool of the free version of Adobe Acrobat Reader DC and some Troubleshooting while encountering errors