The app development process, step by step

This is the process WakeUp Monster, an app and web development agency in Indore, India, uses on every app project. It was shaped by the apps and websites we have delivered for clients in Sydney and Melbourne, and it is designed for founders who have an idea and a clear business goal but have not built an app before. You do not need designs, a technical specification or a developer on your side to start. Each step below explains what happens, what you receive and what we need from you.

Rajat asks about the problem your product solves, who the users are, what they need to be able to do, and what a successful first release looks like for your business. He will also ask about anything already in place, such as a brand, a website, an existing backend or a deadline driven by funding or a launch event.

The call is also a fit check in both directions. If we are not the right team for your product, we say so. We don't build blockchain or Web3 products, train AI models, develop games, build enterprise ERP systems or sell templated apps, and we turn down projects without a clear business objective. Hearing that early saves you time.

The proposal gives a transparent breakdown of scope: which features, screens and systems are included, how the work is split into milestones and when each milestone is due. Read it carefully. The user story document is the most useful thing to challenge at this stage, because a missing story now becomes a change request later.

If you are building a first version, this is also where the scope gets trimmed to what the product needs to prove. Our page on MVP development for startups explains how we scope a first release.

Design follows the user stories: user journeys first, then wireframes, then high-fidelity screens with your brand applied. If you don't have a brand yet, we can create the brand identity and logo as part of the app project. You review the screens in Figma, comment on them and ask for changes until they are right.

Signing off design before development is the single most useful rule in the process. Moving a button or reworking a flow in Figma takes minutes; doing the same in a built app takes developer time and retesting. On Keen as Mustard, a Sydney dating app, the design covered 100+ screens. When the product could not be trademarked under its first name, Match at First Swipe, about four months in, we rebranded it fully, with a new name, logo, palette and identity, without a change order or a paused sprint. Clear, signed-off design files meant the new identity could be applied screen by screen.

Our app UI/UX design service covers this step in more depth, including design systems and research.

We build mobile apps in Flutter, which gives one codebase for iOS and Android. Behind the app we build REST APIs in Node.js or Laravel, use Firebase for real-time features, analytics and push notifications, and host on AWS. Most projects also include an admin panel so your team can manage users, content and moderation, and often a React landing page to collect signups before launch.

iOS test builds go out through TestFlight and Android builds through Google Play Internal Testing. That means you are not judging progress from screenshots: you open the app, try the new features and report what feels wrong. Each milestone can be checked against the scope in your proposal.

Rajat Khoware makes the architecture decisions and personally reviews every deliverable, and he stays your single point of contact throughout. The one thing we need from you during sprints is quick answers: we ask clients to reply to questions and review requests within 24-48 hours, because a question left open for a week stalls the work that depends on it.

Internal QA works through the user stories one by one and then tries to break them: empty states, poor connections, unusual inputs, interrupted payments or sign-ups, and the difference between a new user and a returning one. Problems are fixed before the build reaches you, so your testing time goes on how the product feels rather than on obvious bugs.

On our largest build, Keen as Mustard, 546 internal testers used the TestFlight and Play Internal Testing builds before the client's own testing round. Not every app needs a group that size, but every app needs someone other than its developers to use it properly before real users do.

Store submission needs accounts in your company's name with Apple and Google, so we ask you to set these up early. Launch timing is still your decision: Keen as Mustard was delivered on time in 6 months, and the client then paused the store launch for personal reasons.

The proposal step is fixed at 3-5 days. Everything after it scales with scope. More screens mean more design and more testing; a larger backend means more development; extra products such as an admin panel or landing page add work in parallel. The timeline in your proposal is built from your user stories, with milestones you can track.

Some changes are unavoidable, and a good process absorbs them. The Keen as Mustard rebrand arrived mid-project for legal reasons outside anyone's control, and the app was still delivered on time. Across our projects, no project has been delivered late.

If you are still comparing teams, our guide on how to choose an app development agency lists the proof and questions to ask before you sign. If you are still choosing a framework, our Flutter vs React Native guide compares the two.