I like this technique from Pierre Felgines for applying consistent styles across your app. Instead of subclassing, he proposes functions that apply styles. Add a little syntactic sugar and you have a great way to keep the styling in your app consistent.
Such a great tip from Robin Kunde. If your app deals with opening arbitrary URLs then please do this! I know I always notice when an app gets this right.
Apoorva Tyagi has been digging through the slightly more obscure data that's available in an IAP receipt. For example, did you know that Apple support will leave some information on the reason that a customer cancels if they contact support and request a refund?
As ugly as these screens can be, you almost certainly either already need one, or will need one in the future. As with anything, there's always more to it than you think too so you might want to consider this library from Pavel Kroh if you're considering adding an analytics/privacy opt-in screen to your app.