Develop app for Mobiles and Tablets

I have develop an app and it goes well on mobile phone, specifically Android, I have appled Thunkablex as tool on free-basis. I got problem that when open on Mobile phone,the adv logo of Thunkable will be displayed first before going to my app.

How could it be jumped this display stage (adv logo of Thunkable) as it is not appropriate to my work.