That is true and I did have to deal with that once. I'd heard about Amazon Underground, where you get games and apps for free and downloaded a couple of those Kemco things, as well as KoToR (didn't have a clue if I'd like trying to play a BioWare game on my phone, but at free, the price was right for giving it a try!). And then my phone updated and anything I got from Underground stopped working, immediately crashing when I tried to open it.
But, on the other hand, when we're talking Kemco, that doesn't overly concern me. Their games are far more worthwhile at $3.99 or $4.99 (and amazingly so when I've snagged them for $.99, which hasn't happened in some time, as they've seemed to save all their sales for their trips to newer mediums such as the more modern consoles) than at the 3DS (or other system) price, which seems to be around $9.99.
And, to be honest, if my tablet and Kemco became incompatible, I'd suffer a net loss of about $25 scattered over many months of gathering. These are games I play once and dispose of and I doubt I'd feel anything by losing them all other than, "If I knew that was gonna happen, I'd have bought a few mob movies with that money!"
I'm not afraid to die because I am invincible
Viva la muerte, that's my goddamn principle