How can I make it so that customers can download my app on their ios device without using the app store? I have already made a native iOS app and I was wondering if the consumers could just download the app onto their phone without jailbreaking or installing anything. I could maybe use a third party app store, but I can't have them download the store app and I need it to use my native app, not a web app. Is this even possible? My alternative is to make the app a web app and put it on a 3rd party web app store.
Short answer: You can't.

You can't install native apps without Apple's App Store or a developer account's limited ability to distribute test software or an enterprise account's ability to distribute to it's registered devices.

Web apps are completely unrestricted, but have no means to "install". You have to instruct users to save the bookmark on their home screen.