Follow along with the video below to see how to install our site as a web app on your home screen.
Note: this_feature_currently_requires_accessing_site_using_safari
Given that your site actually has a steady flow of visitors, you may very well be able to earn some money from selling nofollow text-links.
Adsense isn't the only advertising solution, selling links directly from your website can also be a nice source of income.
Note however, getting your first payment from adsense can be hard. And you need to actively improve your content/services, both to drive new visitors to your website, and to keep existing visitors coming back.