The app also includes a favorites section which you can select any crosshair to be your favorites ones by clicking the star icon on top right on the detail screen.
This screen also has functionality to add or remove the crosshair from your favorites list by clicking the star icon on the right top.
By clicking on star icon, app saves it to your favorites crosshair so you don't need to search it every time when you relaunch the app.
This screen contains all the required information to create the any crosshair in the game.
Simply tap the star icon on the right top of the detail screen of the crosshair you like.