They are still a bit active in Coinomi Official Telegram, they posted about Coinomi web wallet, so they are still working on something, but I don't see much activity on twitter and other social media.
Poking about LinkedIn shows that a couple of their key people such as their CTO left the company around the same time as they went silent on all their media channels. It seems maybe there are a few customer support agents still working at Coinomi, but they key people responsible for maintenance and development have all left.For Monero, I don't need to keep it on mobile. That was only out of convenience, not because I need it on the go. So Monerujo won't work. I tried the full wallet once (on a server), and it's much more resource intensive than Bitcoin Core, so that's not an option either.
If you don't want to run your own node, then why not just use the GUI wallet from https://www.getmonero.org/ and connect to a third party node?And no Ethereum 
I thought this could be the third one in the list too.
Why? Just because it's popular? It's a pre-mined scam which is happy to roll back the chain to censor people if the devs so choose. It's the opposite of all the things you want from a proper cryptocurrency. I thought this could be the third one in the list too.