The app constantly plays ads, and does not successfully identify poison orbs. Instead, poison orbs are identified as dark orbs.
Outside of that, there is very limited customization for solutions that focus on one aspect of the board (e.g. TPAs, rows), which can only be unlocked through multiple in app purchases - IAPs not worth our money.
Unfortunately, this is the only such app for iOS as of now, hence the two star rating. Once another app comes out that rectifies the ills of this app, those two stars will become one.
bluevariable7x about Solver for Puzzle & Dragons