In general, it takes about 3 months to make a decent mobile app. That assumes you have a graphics person, a decent backend person, and a decent mobile developer

In general, it takes about 3 months to make a decent mobile app. That assumes you have a graphics person, a decent backend person, and a decent mobile developer. And a design. You can probably skip the backend person and just use firebase or app sync. If you're doing order processing you need that backend/integration person. The less platform integration you do the faster it'll go. If you use react native or flutter you can get that down to maybe 2 months for the three big platforms (web/iOS/android). Their app is really nice, and they had an app on the barista side, so more people and more time. They also had an admin dashboard = more time. Three months is actually pretty good for everything they built. That means they had a designer on-staff, pretty good developers, and a product manager who could communicate. And it's true, their end-to-end system might actually be worth something.