This is yet another clone of Game of War. While I quite like the theme they are using (it translates perfectly to this type of game), it doesn't really add anything new. The only thing I noticed is the ability to fire missiles, which I admit is neat, but not enough to switch things up significantly. Interface is exactly the same, down to the flashy everything that tries to get you to spend a ton of money at every turn. I thought maybe they went with cheaper packs for this game, but no, once you buy a $5 pack everything becomes $20, even the other $5 packs you were offered.
There are, however, some subtle but key features missing here and there, and some screens are quite buggy, especially if you need to scroll or tap on something that's hidden behind their awful UI. The game also seems to crash frequently, and graphical glitches abound. I've seen missiles with their flame detached and trailing behind by miles, soldiers marching in place forever, zeppelins doing weird spins. Normally I can overlook such bugs for a new game, except this is literally a cut and paste of a 5-year-old game.
If you want a good MMO war sim, go for the gold standard and play Lords Mobile. It's not WW1 themed, but it's a fully seasoned game that's worth the money you are essentially required to spend on these things to get anywhere.