Why a phone app and not a web app? [Any thoughts? 🤔]

Portability? I guess it depends on who you are targeting and what you want your customers to do with your app. If it's a phone app, most likely it can work offline and on mobile. In addition, if you have a phone app, word can be easily spread about it. Personally, I would tell my friends about this cool app I got on my phone, but not about a website I just visited.