Thank you for saying "app store" instead of "App Store". If you dictate this sentence on an iPhone it comes out as "The windows App Store".
In other words, the people that work for Apple are so petty that they won't capitalize the word "windows" even if it was preceded by the word "Microsoft" but they always capitalize the words "App Store" because they insist that they have a trademark on this very generic term even though they really don't [0].
According to them, the generic phrase for app store is "online store" [1], which is hilarious because nobody ever says that.
[0] https://en.wikipedia.org/wiki/App_store#%22App_Store%22_trad...
[1] https://www.apple.com/legal/intellectual-property/trademark/...