Drop7

The Good
Drop7 is probably an ideal game for the outdoor environment (during the day). On a sunny day, if you're outdoors, the iPhone screen becomes very dark and you can't see the graphical details of most games. However, you can still see everything in Drop7. That's because Drop7 doesn't have any graphical details. It's got big numbers and big blocks, and that's all there is to it.

The Bad
Tumors. That's what this game reminds me of. You erase blocks in an endless fashion. There are two modes but they're both endless. You'll never be able to actually "complete" a level. Every gameplay session ends with you dying (i.e. the board being filled up). Is it possible to erase the entire board and actually win? I don't know. It certainly would not be easy to do, and isn't nearly worth the effort of playing.

Now, I'll explain what I said about "tumors". Everytime you successfully erase a line of blocks, another line of blocks will appear soon, effectively neutralizing your efforts. It's like tumors, because all they do is grow. The obstacles on the game board will always grow, and never reduce in size. The more you play, the more frustrated you feel. Now, there are Japanese avant-garde experimental games that are meant to provide a huge sense of frustration, and Drop7 feels like it belongs in that category as well.

It's a very minimal game with two very similar modes. No music. No catchy sound effects. No bonus goodies or powerups as you make progress. No nothing.

The Bottom Line
It's worth a try if available for free. I bought this for $5 and I wasted every dollar.