Just downloaded the AppCore on an iphone. The 3 files are in the Downloads. There’s no means available afterwards to install it. I also have Nostore installed for some time now, followed the steps in Safary and granted the extension permission. You can consider I’m computer illiterate, so please help what to do next to use the AppCore. Thanks! 
Apart from searching for apps, AppCore Search also allows you to search the internet. It uses DuckDuckGo by default, and you can easily use DDG "bangs" to search for anything.
For example, use !chat for AI Chat, !yt for YouTube search, !r for Reddit search, and more.
Download: https://github.com/iefanx/AppCore/releases/tag/appcore-v1
https://video.nostr.build/d9b057b8646060650ed8da15e936f793c039d795e37b85356c1126790006a16a.mp4