1.Signup/Signin
2.Categories of Ads -- Single Level categories
3.Search Ads
4.Search Ads by category
5.Submit an Ad
6.Ad details like: Name, Description, Model, Year, Pictures, etc.
7.Send message on Ad to Seller or buyer
8.Mark an Ad to view later and can be viewed offline
9.Push notification when Buyer or seller send message

1.Add to Home screen popup
2.Manifest.json 3.Offline availability with service-worker.js 4.If vendor updates the assets or resources then app gets updated on client

5.Push notifications, your OLX app will send context-based alerts to tell users they have messages from buyers or sellers. These notifications look the same as those on native apps, and arrive even if the browser is no longer running.