Currency converter niche on the App Store is terribly crowded space. When you search for currency on the App Store, you get 2200+ results. Searching for currency converter gives you 840 results. My currency converter app - Banca - was ranked around 35-40th position when using these keywords, which is next to infinity in current cards-layout of the search results in the App Store app. Up to this point, Banca had 140k downloads (it’s on the store for two years).
Thus on January 17th, I organized a promotion where Banca would be free and I aimed to get as high number of downloads as I can in a short space of time. I wanted to see how much I can move that needle.
Results are not spectacular, but are still significant enough.