I can't stress this enough.
People see your app, install it, look it, if they like it then it stays, otherwise its on its way to the recycle bin.
So if you want to get that perfectly looking mobile app, you need to have designing tools that will enable you to design your desired app.
From my experience, here are 5 of the best mobile app designing tools:
1. Adobe Photoshop
3. Adobe XD
Which tools have you used and which do you think are the best?