I find InstaOption web version to be very useful to place multiple leg option strategy. However, the mobile version is not that great. Adding multiple legs to strategy/basket is a pain as the basket window overshadows option chain, there is no way to minimise the basket window.
Please add selection next to strike so that multiple strike price can directly be added to basket in one go. Please look into the UI of mobile version as it requires some work to make it more user friendly.