Okay, let me explain. I have an email message that I want to send to 20 friends. The message is identical to all 20 people, except for the greeting "Dear (first name),". An easy way to do that is a mail merge. I "merge" the standard email message with data in a spreadsheet. There are two columns in the spreadsheet, one column containing the email address, and one column containing the person's first name. There are 20 rows in the spreadsheet for the 20 email messages I want to send. The email app and the spreadsheet app have to "talk" to each other - the email app takes the draft message, sees that it needs an email address and a first name and gets those pieces of information from the spreadsheet. The email program sees 20 rows in the spreadsheet, so it knows it has to send 20 emails. The email program takes the email address in the first column and puts it in the To: line, then takes the first name in the second column and inserts it into the text of the message after the word "Dear", and then it send the message. This procedure repeats for each line of the 20 lines in the spreadsheet. This whole activity takes a few seconds to complete. The desktop version of Google Sheets has "add ons" that enable it to interact with Gmail and do a mail merge. But I am an Android-only user, and am looking for a way to do this without using a desktop. There is a mail merge app in the App Store, but it no longer works. There are also workflow apps that allow you to define a process that involves separate apps working together. I haven't tried that yet. I am looking for someone who has successfully done a mail merge using only the Android environment.