This app was mentioned in 7 comments, with an average of 2.00 upvotes
I've been looking for a good one for a while! The best I could fine is pixel people, but it's ridiculously hard to click on things.
Hmm, i have played every single idle game on Droid that has achievements and compiled all but 3-4 on my wikia. As for complexity sake...there are none.
Time Clickers is pure grind. There is no complexity, you cant even screw yourself over too much. The game "starts" at level 100, which you will reach in matter of hours of normal gameplay and using upgrades you get there faster (higher start zone, more DPS, etc). Key upgrades: Starting zone, Starting gold, Gold Rush, Teamwork, Time cube upgrades, Defeat less enemies and DPS. Clicking is weak.
Galaxy Clicker is a traditional crafting game. Not exactly as complex, but much more than other mentioned. Clicking is not too important, but is very helpful. There is an upgrade that keeps the ship pressed after you stop clicking. I did not like this game as it was rather bland for my taste.
Clicker Heroes (and its derivates) are all the same. No complexity involved. Tapping is meaningless after you get 2nd idle unti (3rd unit) and your DPS goes over your click damage. Clicker Heroes and Tap Tap Infinity provide hours upon hours of heavy grind and bit of fun.
AdCap is over-rated game in my opinion. Everybody is going mental about how this game is amazing, while all it does is make you wait for bar to fill to make money to make the bar fill faster and give you more money. While the Angels are nice addition, the complexity is non-existant.
Realm Grinder is a very unique game, so finding complex games on Droid that would be similar to it is impossible. Even on PC you would get the usual Sandcastle/Anti:Idle/Trimps/AdCap set of games.
Now, the game i consider incremental, due to its nature, and large due to the amount of content (=mindless waiting), is Pixel People
In this game, you are in charge of Utopia, where you mix professions to make new professions. What is incremental about it? With most of the professions you get buildings, which after being populated, produce money. Then you build houses, expand your place...and so on, very simple to understand how to deal with this game. For the achievements to be visible, you need to get Police Station and some achievements give you currency. Not very complex by my standards, but give a word "grind" a new...less exciting meaning
I really enjoyed Pixel People which is like a city builder/doodle god kind of game. https://play.google.com/store/apps/details?id=com.chillingo.pixelpeople.android.rowgplay&hl=en