Apps you know.
Blueprints you can use.
Most app ideas are "like X, but for Y". Each page takes one well-known app apart: what it does at its core, the stack a developer would use, the hardest parts and what to leave out of your first version.
An app like Uber
Two apps, live location and a dispatch that offers each ride to the right driver.
Booking marketplaceAn app like Airbnb
Listings, a calendar that never double-books, and payouts to hosts after check-in.
DatingAn app like Tinder
A deck of people nearby, a match on mutual likes, chat, and safety from day one.
LearningAn app like Duolingo
Short lessons, an exercise engine and a streak that has to be right in every time zone.
Meditation and audioAn app like Calm
An audio library, a player that keeps going on the lock screen, and a subscription.
Docs and workspaceAn app like Notion
A block editor, nested pages with sharing, and collaboration that comes later.
Fitness trackingAn app like Strava
GPS recording in the background, clean routes on a map and a feed for friends.
Second-hand marketplaceAn app like Vinted
Listing in under a minute, search with filters, and payments held until the item arrives.
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App names are trademarks of their owners. Find My Stack is not affiliated with any of them; the names only describe types of apps.