Dont bother with any version past 3.4.3 because ads become more intrusive, the screen gets cluttered with special offers that aren't special and extra keys are added that you can't use to buy anything. The game screen becomes full of 'offers' that hide the playing area, ads pop up when in the middle of building/collecting rent/snagging money/collecting keys ansd you lose the opportunity to to ad to your treasury. The diamond keys - no idea what they do. Free keys option is removed, and houses/busineses are switched from cash to gold coin faster than before. Game is no longer fun to play. Played with the kids where we all had one island to build and traded with each other but no more. No longer a game worth pursuing. Find another sim game to play that doesn't keep taking the options to earn buildings and businesses with every little 'version upgrade.'