I added new products into the feed but they're not in the app?

When adding new products to your feed, you first need to be aware of what time the feed is processed.

Once you know what time the feed is processed, you should add the products in before this time and allow for the feed to be generated so that it can be processed for the app. 

Another thing to remember is that there may be caching which usually takes around 15-30 minutes to refresh before the products appear.