The WorkGuru Android app lets you quickly review existing and add notes to projects.  After logging into the app, tap Projects.

Search for and select the required project to add a note to.  Tap on the project tile to open it.

Tap on the Notes tab of the project details.  You can review existing notes on the project or tap the green plus "+" icon to add a note from the app.  If the user has sufficient permissions they will be able to delete notes from the app as well via the red trash can icon.

Enter note text and tap Save.  Note: hide the keyboard to display the save button.

The note is now available on the notes tab in the project details page.