A simple test for deciding where your first budget should go when you cannot do both at once.
If people need to find you, a website comes first. Search engines index web pages, not app stores, and a new customer will not install anything before they trust you.
If people need to use you repeatedly, an app starts to earn its keep. Notifications, offline access and a home-screen icon all pull returning users back in.
A good middle path is a web app: one build that works in the browser on every device, with an installable version for the people who want it.
Whatever you choose, keep the first release small. Ship the one thing your customers ask for most, then let real usage decide what comes next.
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