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I have a simple accessibility utility for iOS that now has ~100 $0.99 monthly subscriptions, but its growing really slowly.

I have a free 7 day trial, that according to App Store Connect converts at 56% with an 86% retention rate. However these figures are based on 150 free downloads per month, which is really low.

What strategies can I use to increase the number of downloads the app gets in mid-2021?

I've just been offered four figures for a 4 letter Instagram name.

Is this a scam, or are short instagram names valuable? If so, how?

Firebase (even with GeoFirestore) seems severely limited in terms of queries, e.g. find all users within 10km of the current location who are between 18 and 25, male and are interested in x,y,z is currently impossible.

What alternatives are there that facilitate this type of query in 2020?