Mobile Layla is only a visual designs skin app that has same skins in the shop.
You have already heard about visual skins for Mobile Legend that can make you use and test it's awesomeness. Here you can select and choose a visual skin to use so that you can test it and you have the choice if you will/you won't buy it in the shop. The app is easy to use and you can use it with your friends to enjoy the game.