Yeah there is many website available on internet now where you can make android and ios app easily without much knowledge of coding.
Here are some list of best app making site:
Thunkable
thunkable.com is very popular site for android app building. You can create any app easily here without coding you can design app inserting buttons and all function one by one manually and make their function run through blocks design. For begineers there is video tutorial available on youtube.appybuilder
Its a website which automatically create app according to your demand. You can add extra features through their site also.