Adsense requests a primary web url, the problem is that I don't have a web page. Is there a solution other than creating a web page. I only wish to advertise via the free android mobile app. Suggestions?

OK, I don't know if this still works, but it did a few years ago when I was new. Just get a google account if you don't already have one. Then create a blogger (blogspot) blog about anything. When I did that, they asked right away if I wanted to place adsense ads on my new blog. My adsense account was live in less than 24 hrs. If they don't offer you adsense when you set up the blog, then do a few posts over a week's time. When they detect activity on the blog, I think then they will offer you adsense. Then you are free to use adsense ads on any and all domains you ever get, or your publisher code to invoke ads on your behalf on various services that allow you to enter your code in their systems. Hope this helps! Scott

If you sign up for admob (google banner ads for apps) it's instant approval. Each campaign you set up has the option to enable adsense to improve the fill rate. I don't have an adsense account, never have, but I still get paid from adsense ads showing in my apps.

the best alternative to google adsense is adtomatik, They give me most suitable advice about the monetization strategy and offer modern digital solutions such as: In-image ads, Native ads, Among Others.