I am one who writes iOS Apps, there may be others.
Regarding search facilities, App publishers are allowed to include a limited number of keywords with each App, that will result in search hits on the App Store. These keywords are in addition to the App’s name, developer name, etc.
I write my own Apps on old-fashioned Objective C. That is partly because (my excuse) I like to squeeze every last ounce of performance out of the CPU, and partly because (the reality) I am just old fashioned. The SDK is easy to master, but you must have a Macintosh PC, which I think Weaver does not have access to.
There also exist Web Apps, which I have pretty much ignored because my limited brain capacity is still brimming full of traditional technology, leaving no space for new fangled ideas. Web Apps might be worth exploring, though I’d not be the one to advise.