Ask three developers for the cost of an app and you will get three very different numbers. That is not always dishonesty — it is because "an app" can mean very different things. Here is what actually moves the cost, so you can read a quote and share the details that make a quote useful.
The number of screens is the first factor. A five-screen catalogue app and a thirty-screen app with accounts, search, filters, and settings are different projects, even if both are called "an app". List your screens before you ask for a price: home, listing, detail, cart, checkout, account, and anything else the user touches.
The backend is the second factor, and usually the biggest. An app that only shows content is much simpler than one with login, orders, payments, an admin panel, and notifications. Each backend piece — user accounts, order handling, payment handling, admin tools — is real work, and it keeps working after launch.
Design and content readiness come next. If designs are ready and photos, menus, and prices are prepared, development moves fast. If the developer has to design screens and wait for content, the timeline stretches — and content delays cause more missed dates than coding does.
Integrations add cost one by one: maps, live tracking, chat, push notifications, camera, and payments. Each one needs setup, testing, and store permissions. A maps feature and a chat feature are not small extras; they are features with their own testing and edge cases.
Platforms matter less with Flutter than with native development, because one codebase covers Android and iOS. But the store release still takes work for each store: listings, screenshots, privacy details, and review. Budget time for review on both stores, and expect small rejections over policy details — fixing them is normal.
Maintenance is the cost people forget. Phones update, store rules change, and users report bugs. An app without a maintenance plan slowly breaks. Ask who handles updates and what that costs before launch, not after something stops working.
To get a useful quote, share four things: who uses the app, the list of screens, whether you already have a backend or website to reuse, and your must-have features versus nice-to-haves. A developer who asks hard questions before quoting is doing you a favour — the answers change the work.
Watch for quotes that skip the questions: a complete app promised in a week, a single number with no breakdown, or pressure to pay everything upfront. Good quotes explain what is included, what is not, and what happens after launch.
Agree on milestones, not just a total: a small payment to start, payments as working builds arrive, and a final payment after the store release and a short bug-fix window. Put source code handover and store account ownership in writing. You should own your app, not rent access to it.
Cost is not the only number that matters. An app that ships, gets used, and can be maintained is cheaper than a cheap app that never launches or dies a month later. Judge a quote by what it includes, what it leaves out, and whether the developer's shipped apps prove they can finish the job.
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