This is like the black-and-white scene in an infomercial in which a person dramatically fails to perform a simple, everyday task.
If using an app is truly that hard, use a different app.
I have an "email to self" app on my phone. One tap and it opens my email app with my personal email address pre-loaded. Then I write whatever in there, or use voice dictation, and hit send. Syncing, backups, distribution to all my devices - all taken care of already because it's email. Fancy stuff.
What it sucks for is any idea that is better explained or formulated with a drawing. For that I use paper. When I'm done, I take a picture with my phone, and then it gets synced to the cloud.