Hi,
I got up to a legend on my ipad, but have now switched to the ps ... BIG learning curve, but necessary if you want to play against others and see how they shoot (learn)
on the ipad, i did the following:
1. Always analyze the slope from the back of the pin view.
2. after making a good guess as to the shape of the sot & approximate aiming point. I then switch to forward view and find the nearest back line intersection (to the nearest 1/2 square) .
3. sometimes I use the back view (looking from the pin) and go one, two or three squares right and up or down.
4. ALWAYS hit your grid intersections somewhere (even in step 2, at the 1/2 way point between 2 grid intersections you will be hitting an intersection somewhere along the path)
5. look for a Utube video that shows 5 techniques (forgot his name) on "wgt putting tutorial" ... helped my game a LOT.
Good luck :)