What Does an App Developer Actually Do? (Explained for Non-Technical Founders)
You have an app idea. Maybe it solves a problem you experience daily, or you have spotted a gap in the market. But when you start researching development, you hit a wall of jargon: APIs, SDKs, backend, frontend, native versus cross-platform, agile sprints.
This guide translates the entire app development process into plain language. By the end, you will understand what happens at each stage, what you can expect from a developer, and how to have productive conversations without needing a computer science degree.
We will use real examples from our own 8 apps to illustrate each stage — because abstract explanations are less useful than seeing how it actually works.
SnapFix — built through this exact process
SnapFix: AI Home Repair Help
SnapFix went from idea to App Store through the six stages described above. Discovery defined the core photo-to-diagnosis flow. Design prioritised one-handed usability. Development was done in Swift and SwiftUI. Testing included real homeowners. The result: a 4.7-star App Store rating.
Stage 1: Discovery — turning your idea into a plan
Before any code is written, a developer needs to understand three things: what problem your app solves, who it solves it for, and what the minimum set of features is to deliver that solution.
This stage typically involves one to three meetings where the developer asks questions like: Who is your target user? What is the one thing they should be able to do with this app? What existing solutions are they currently using? What devices do they use?
The output of discovery is a scope document — a plain-language description of what the app will do, what screens it will have, and what features are included in version one versus deferred to later versions.
When we built SnapFix, the discovery stage defined the core user journey: homeowner sees damage → takes a photo → gets AI diagnosis → follows repair steps. Features like multi-photo analysis and voice guidance were explicitly deferred to version two.
Stage 2: Design — what the app looks like and how it feels
Design is not just making things look pretty — it is determining how users interact with your app. A designer creates wireframes (basic layout sketches), then visual designs (polished screens with colours, fonts, and icons), then interactive prototypes (clickable mockups you can test).
You will typically review designs in a tool like Figma, where you can click through the app as if it were real, leave comments on specific screens, and suggest changes. This is your chance to catch issues before development starts — changing a design in Figma takes minutes; changing it in code takes hours.
Good design follows platform conventions. iOS users expect navigation patterns that differ from Android users. A skilled designer knows these conventions and applies them so your app feels native on each platform.
For Theory Elite, the design stage focused on making quiz questions readable under time pressure — large fonts, high contrast, and a clear progress indicator. These design decisions directly impacted user engagement and retention.
Stage 3: Development — building the actual app
This is where code is written and the app comes to life. Development typically happens in two-week sprints — focused work periods where the developer builds specific features, shows you the progress, and incorporates your feedback.
You will receive test builds (called 'beta builds' on iOS via TestFlight) that you can install on your phone and try out. This lets you experience the real app on your real device, not just look at screenshots.
During development, the developer is building two things you can see (the 'frontend' — the screens and buttons) and things you cannot see (the 'backend' — the server, database, and logic that power the app). Both are essential, but only the frontend is visible to you.
Expect regular questions during development. A good developer will ask for clarification on edge cases: 'What should happen if the user has no internet connection?' or 'Should this list be sorted by date or by name?' These questions are a sign of thoroughness, not indecision.
Stage 4: Testing — making sure it works everywhere
Testing ensures the app works correctly across different devices, screen sizes, and scenarios. A developer tests for functionality (does every button work?), performance (does it load quickly?), edge cases (what happens with no internet?), and compatibility (does it work on older phones?).
You should also test the app yourself and recruit 5-10 people from your target audience to test it. Fresh eyes catch issues that developers miss because they are too familiar with the app.
For ABC Kids, testing revealed that toddlers tapped much more aggressively and randomly than adults. The development team had to increase tap target sizes and add tolerance for imprecise touches — an insight that only came from watching real toddlers use the app.
Stage 5: Launch — getting your app into users' hands
Submitting to the App Store or Google Play is a process with specific requirements. Apple reviews every app submission and can reject apps for technical issues, design violations, or policy concerns. An experienced developer knows these requirements and builds to meet them from the start.
The submission process typically takes: 1-2 days to prepare assets (screenshots, descriptions, keywords), 1-3 days for Apple's review, and 1-2 days for any required revisions. Google Play reviews are typically faster (hours to one day).
Launch day is not the finish line — it is the starting line. Your developer should help you set up analytics (to understand how users behave), crash reporting (to catch and fix issues quickly), and a feedback channel (to hear from users directly).
Stage 6: Post-launch — the ongoing relationship
After launch, your app needs ongoing attention. Operating system updates (iOS and Android release major updates annually) can break app functionality if not addressed. User feedback reveals needed improvements. Performance monitoring catches issues before users complain.
A good developer relationship is long-term. They maintain your app, ship improvements, and keep it compatible with new devices and OS versions. This ongoing maintenance typically costs 15-20% of the original development cost per year.
For all 8 Kinexapps apps, post-launch work has been as important as the initial build. SnapFix's most-used features (multi-photo analysis, text-to-speech) were all added after the initial launch based on user feedback.
Frequently asked questions
How long does the entire app development process take?
A simple MVP takes 6-8 weeks from discovery to launch. A mid-complexity app takes 3-4 months. Complex multi-platform apps take 4-8 months. These timelines include all six stages: discovery, design, development, testing, launch, and initial post-launch support.
Do I need to be technical to work with an app developer?
Not at all. A good developer translates technical decisions into plain language. Your role is to define the problem, provide feedback on designs and test builds, and make business decisions. The developer handles the technical execution.
What is the difference between frontend and backend?
Frontend is everything you see and interact with — screens, buttons, animations. Backend is everything behind the scenes — the server, database, user accounts, and logic that power the app. Both are essential; you only see the frontend.
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