I have a Nook HD, 8G with a 32G MicroSD (SanDisk) card that has Android 4.2.1.

I have Fish Tycoon that I bought either at Google Play or Amazon Apps (will have to check) and it plays great for the most part. I have bought all 3 upgrades of Food, Environment and Advertising.

I did not have any crashing issues until after I completed the 3rd level of Advertising. But, the 3rd level of Advertising is the last one I bought. In other words, if I had completed the 3rd level of Advertising before completing the 3rd level of Food or Environment, then perhaps it would have started after completing those instead.

I have ran into the problem that others were posting about where it closes when Selling. Although, I can actually get into the Sell screen and even sell all my fish, but as soon as I try to get back to tanks 1 or 2, then it closes.

I decided to see if Clear Data would work, so I went into my Setting, Apps, Fish Tycoon. Clear Data is grayed out, but clear cache was not. It stated 24kb of cache. I hit clear cache and it went to 12kb.

I went back into my game and everything that I had done before I sold fish was undone. I had to choose which fish to sell, which fish to get pregnant, etc. Then I sold and this time it let me go back to either/both fish tank 1 and 2.

I went out of the game and back in again and moved a few from one tank to the next. Found 3 more I wanted to sell and moved them into the Sell tank. Went in and sold and it crashed again.

I cleared the cache (again, it stated 24kb and cleared to 12kb) then went back into my game. This time most were sold and some were pregnant and there were still 3 I wanted to sell. I moved those 3 to the Sale tank and sold them, then hit Menu and exited. Went and cleared cached from 24kb back to 12kb, went back in and had just what I wanted.

So, maybe what I reported will not help at all, maybe it will. I think the problem with the crashing is linked to the way/amount of cache.