I've been playing Auralux 2 lately. Auralux is a minimalist mobile RTS game, definitely on android probably on iOS as well. It's like Eufloria a little in that resources/territory/units are all tied together. Capture stars, once you have them, they pump out units. Auralux 2 adds a lot of little things (black holes, white holes, fog, and more), but it mostly feels similar to the first, which is nice. No need to reinvent this wheel.
Nicest of all is that it isn't that annoying IAP model where it's constantly hassling you for powerups or advertising. The first 10 or levels are free as a demo, after that you can buy 10 levels at a time (a constellation) for $1 or $2, or all of them for ~$10. I paid $10 and the two new constellations that have been added since then were both covered as well as the ones already in place, so it's a good deal IMO. Especially if you've got credit to burn from Google rewards.