Mobile App Development Glossary (Plain English)
Updated 31 May 2026 · 6 min read
This glossary explains 20+ core mobile app development terms in plain English, from MVP and API to native, cross-platform and backend, so non-technical founders can talk to developers with confidence and avoid costly misunderstandings.
Key takeaways
- MVP means the smallest version that delivers core value, not a half-finished app.
- Native means platform-specific code; cross-platform means one codebase for both.
- An API is how apps talk to each other and to your backend.
- Backend is the server side; frontend is what users see and tap.
- Knowing these terms prevents costly miscommunication with developers.
Why does app jargon matter to founders?
Words cost money when you misunderstand them. A founder who confuses an MVP with a full product, or thinks native and cross-platform are the same, can approve the wrong scope and overspend by lakhs. This glossary gives you plain-English definitions of the terms developers use daily, so you can read proposals, ask sharper questions and spot when a quote doesn't match what you actually need. You don't need to code. You do need to understand the vocabulary well enough to make good decisions and avoid being talked past. Bookmark this, and use it whenever a proposal or developer conversation throws a term you're unsure about.
- MVP (Minimum Viable Product)
- The smallest version of your app that delivers core value to users. It tests your idea cheaply before you invest in extra features.
- Native app
- An app written in a platform's own language (Kotlin for Android, Swift for iOS). Best performance, but you build each platform separately.
- Cross-platform
- Building one codebase that runs on both Android and iOS, using tools like Flutter or React Native. Saves cost and time.
- Frontend
- Everything users see and interact with: screens, buttons, layouts and animations. Also called the client side.
- Backend
- The server side that stores data, runs logic and powers the app behind the scenes. Users never see it directly.
- API
- Application Programming Interface, the way two software systems talk to each other, like your app requesting data from your server.
- SDK
- Software Development Kit, a ready-made toolset developers add to an app, for example a payment or maps SDK.
- UI / UX
- UI is the visual design of screens; UX is how easy and pleasant the app is to use. Both shape whether users stay.
- Database
- Where your app's data lives, such as user accounts, orders or messages. PostgreSQL and Firebase are common choices.
- Push notification
- A message sent to a user's device even when the app is closed, used for alerts, reminders and re-engagement.
- App Store Optimisation (ASO)
- Improving your store listing (title, keywords, screenshots) so more people find and install your app organically.
- Build / release build
- A packaged, installable version of your app. A release build is the production-ready version submitted to the stores.
- QA (Quality Assurance)
- Systematic testing to find and fix bugs before launch, across devices, screen sizes and OS versions.
- Wireframe
- A simple, low-detail sketch of each screen's layout, made before visual design to agree structure and flow early.
- Sprint
- A short, fixed work cycle (often one to two weeks) in which a defined set of features is built and reviewed.
- Source code
- The actual programming files that make up your app. You should always own this and have repository access.
- Repository (repo)
- An online store of your source code and its history, usually on GitHub or GitLab, that lets teams collaborate safely.
- Cloud hosting
- Running your backend and database on rented servers (AWS, Google Cloud, Firebase) instead of your own hardware.
- Scalability
- An app's ability to handle growing numbers of users without slowing down or breaking. Planned for in the backend.
- Maintenance
- Ongoing work after launch: bug fixes, security patches and OS updates. Budget 15-20% of build cost per year.
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Frequently asked questions
What is an MVP in app development?
An MVP, or minimum viable product, is the smallest version of your app that delivers core value to users. It lets you test the idea with real users cheaply and quickly before investing in extra features for version two.
What's the difference between frontend and backend?
The frontend is what users see and tap: screens, buttons and layouts. The backend is the server side that stores data and runs logic behind the scenes. Most apps need both, and they communicate through an API.
Why do I need to own my source code?
Source code is the actual blueprint of your app. Owning it, with repository access, means you can switch developers, fix issues and keep building even if your current vendor relationship ends. Always confirm ownership in writing before you start.
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