Too many food apps

Does anyone have any tricks for keeping track of all the food apps these days? Every restaurant has a partnership with one vendor or another (i.e. Liven / Payo / Foodpanda etc.) but they don't always say upfront which ones they support a) because there's usually discounts in the apps and b) those apps have a take rate that the restaurants would prefer to avoid.

I wrote down a list of all the apps I know of to check against (https://medium.com/p/2068737bbe8b) when I go into a restaurant before paying to get the best price, but it'd be great if there was some kind of aggregator for all of this so I could see at a glance what the best price is for the area i'm in. Does that exist?