Comment 1 for bug 1414325

Not sure I understand what you mean... The Tower info dialog has all the informations about the different tower properties. When you click the tower info button a window will open, showing all the tower upgrades and what exactly the do.

I don't think it makes sense to write which units they are best against. For once because there isn't really such a measure as lots of things play into account. For example the position where you build the tower is much more important than the units it fights against. Also, if there is such a thing, it's part of the challenge of the game to figure that.

If you want to see the tower info before building a tower, do a long-press on it in the bottom panel. An upgrade also doesn't only upgrade power, or speed etc, but rather upgrades multiple of those properties at the same time. In order to see what exactly an upgrade does, again, go to the tower info dialog (longpress in the bottom panel, or i button in the tower overlay) and read all the details.