But it's my primary pc with Ubuntu on it. And even though i hate some of it quirks, I still get 8 hours of battery life out of it even after a year of consistent use.

Keep is on (all?) Android devices too. I use it on my phone to jot down things without needing to reach for something bulky like Evernote. It's pretty limited but for writing a book recommendation, shopping list, or a catchy lyric it works perfectly.

They Keep iPhone app gets updated quite frequently. I suspect that the shut down of Chrome browser external apps for all platforms except Chrome OS in 2018 [1] is probably (part of) the cause for infrequent updates.

[1]:http://www.theverge.com/2016/8/19/12555052/google-shutting-d...