This app was mentioned in 19 comments, with an average of 2.05 upvotes
Nope, I write everything on my phone, am using Daygram.
The issue is that now that I've reached 100k words I can't export a .txt file or send it as an email. I wrote the devs, but they haven't responded. Last time it worked was at around 95k words, that was around 2 weeks ago, so I just copy pasted the remaining 2 weeks into Google Keep and then put everything into wordcounter.net. Word works fine too.
I use daygram its a paid app,very convinient and do the work Highly recommend it for writting daily diary plus it has sync service with dropbox https://play.google.com/store/apps/details?id=net.saltycrackers.daygram
I've used three journaling apps extensively and I also look for simple and not cluttered UI. You can backup to GDrive and/or Dropbox in each of these apps.
However, IIRC each has in-app purchase. The first two for removing ads. Diarium is a little weird, it confuses me. The desktop app is paid, Android version is free, but requires an in-app purchase for automatic syncing (?) and a few other things. I don't know, I bought both.
At least post the link: https://play.google.com/store/apps/details?id=net.saltycrackers.daygram
Daygram is what I'm using right now
I think Daygram suits your needs.
https://play.google.com/store/apps/details?id=net.saltycrackers.daygram
I really enjoy daygram, it has a simple and pleasing interface with a passcode option.
https://play.google.com/store/apps/details?id=net.saltycrackers.daygram
Link. (Google searches kept redirecting me to the iTunes version.)