App Development Expert — Amit Kumar
An app development expert is a developer with proven experience building, securing, and shipping mobile apps to real users on the Play Store and App Store. I am Amit Kumar, founder of Cyber Defence, CEH and CRTA certified, and I build Android and iOS apps for businesses across India. My security background means your app protects user data and payments by design. When you hire me you work directly with the person building the app, from idea to launch.
Last updated: 2026-07-08 · Written by Amit Kumar (CEH, CRTA), Cyber Defence, Hisar
What an app development expert really does
Building an app that runs is easy; building one that people keep on their phone is hard, and that gap is what an expert fills. An expert plans the app around what users actually do, not every feature you can imagine, so version one launches lean and useful. An expert knows how to keep the app fast on a two-year-old budget phone, how to store login tokens and payment data safely, how to survive an app-store review, and how to push updates without breaking the version people already installed. My CEH and CRTA certifications matter here because mobile apps are a favourite target — insecure data storage and weak API calls leak user information constantly. I close those gaps during development. An expert also thinks past launch: crash reporting, analytics, and a clean back-end so version two does not mean starting over. That planning is invisible in a demo but decides whether your app lives or dies.
What I build
I develop mobile apps for real businesses: e-commerce and ordering apps, service-booking apps, delivery and tracking apps, learning and content apps, membership apps, and internal tools for teams. I build cross-platform with React Native or Flutter so one codebase runs on both Android and iOS, which keeps your cost and timeline roughly half of building each separately. Where an app genuinely needs native performance, I build native. Every app comes with the pieces users expect — secure login, push notifications, in-app payments through gateways like Razorpay, offline handling, and a clean, fast interface. I also build the back-end that powers the app: the APIs, the database, and an admin panel so you can manage users, orders, and content without calling me. If you already have a website, I can build an app that shares the same data. You get one person accountable for the whole system.
Tools, stack, and process
For most business apps I use React Native or Flutter, because a single codebase on both platforms saves you serious money without a real drop in quality. The back-end is usually Node with a MySQL or Postgres database, secured the way my certifications taught me — encrypted storage, validated APIs, and no secrets baked into the app. I work in visible stages so you are never in the dark: we lock scope and a fixed price, I share early builds you can install and try on your own phone, you test real flows, and we launch to the stores together once it is stable. I handle the Play Store and App Store submission, which trips up many first-timers. After launch I hand over the code, the store accounts, and documentation, so the app is genuinely yours. I stay on for updates and support, but you are never locked in.
Expert vs agency — the honest comparison
Big agencies and an independent expert both ship apps, so which is right for you? An agency gives you a large team, formal process, and a big invoice — often ₹5,00,000-plus for what a solo expert builds for a fraction of that, because you are paying for account managers, sales staff, and office overhead you never meet. Communication passes through layers, so a small change can take a week and three emails. An independent expert like me gives you direct access to the person coding your app, faster decisions, and a lower price — but you should check that the expert is genuinely experienced and reachable, because a bad solo developer is worse than a good agency. My honest take: for most Indian small-to-mid businesses, a proven independent expert wins on cost and speed. Choose a large agency only if you need a huge team building many products at once. For a focused app, direct access beats a big org chart.
Why clients trust me
You deal with me, Amit Kumar, from the first message to the app-store launch and every update after. I write the code, I answer your questions, and I am honest about what an app can and cannot do for your business. My CEH and CRTA certifications are real and verifiable, and mobile security is exactly where they pay off — your users' data and payments are protected by design, not as an afterthought. I am based in Hisar, Haryana, and I build for clients across India through calls, WhatsApp, and installable test builds, so distance never slows us down. I do not fake reviews, invent client logos, or promise a million downloads. I would rather show you an app I have shipped and let you judge the quality. If your idea needs a bigger team than I can give it, I say so plainly instead of overcommitting and letting you down.
What app development costs
Hiring me to build your app runs from about ₹60,000 for a focused single-purpose app to ₹3,00,000-plus for a feature-rich app with payments, real-time features, and a full admin back-end. A typical business app — cross-platform, with login, listings, and payments — sits around ₹1,20,000 to ₹2,00,000. Cross-platform building with React Native or Flutter is what keeps these numbers roughly half of native-for-each-platform. I quote a fixed price per project after our first call, so you know the total before we start. App-store developer accounts, paid services, and third-party APIs are billed at actual cost, transparently. Every project includes launch support and a warranty window for bug fixes. I am not the cheapest, and I will not pretend to be, but I aim to build an app that survives store updates and grows with you rather than one you rebuild in a year. WhatsApp me at 75175 72000 for a written quote.
Who should hire an app expert
Hire an app development expert when the app is central to your business — when it takes orders, handles payments, stores user data, or is the product itself. That includes businesses turning a website into a mobile app, startups launching their first product, service providers who need booking on the go, and shops wanting their own ordering app instead of paying marketplace commissions. It also fits anyone who tried a cheap app builder and hit its limits. You probably do not need a custom app if a simple mobile website would do the job, and I will tell you so honestly rather than sell you something you do not need. But if you need push notifications, offline use, payments, or a real place on users' home screens, that is exactly the work I do. Describe your idea on WhatsApp and I will tell you plainly what it takes.
App Development Expert Pricing (India, 2026)
| App Type | What You Get | Price (INR) | Timeline |
|---|---|---|---|
| Single-purpose app | One core feature, cross-platform | ₹60,000 – ₹1,00,000 | 4–6 weeks |
| Business app | Login, listings, payments | ₹1,20,000 – ₹2,00,000 | 8–12 weeks |
| E-commerce / ordering app | Cart, payments, admin panel | ₹1,50,000 – ₹2,50,000 | 10–14 weeks |
| Feature-rich app | Real-time, complex flows | ₹2,50,000 – ₹3,00,000+ | 12–16 weeks |
Frequently Asked Questions
How much does it cost to hire an app development expert in India?
Hiring an app development expert in India costs from about ₹60,000 for a focused single-purpose app to ₹3,00,000-plus for a feature-rich app with payments and an admin back-end. A typical cross-platform business app is ₹1,20,000 to ₹2,00,000. I quote a fixed project price after our first call, with no hourly billing.
How long does it take to develop a mobile app?
A focused single-purpose app takes about 4 to 6 weeks. A standard business app with login, listings, and payments takes 8 to 12 weeks. Complex apps with real-time features take longer. Building cross-platform with React Native or Flutter keeps timelines shorter than building separately for Android and iOS.
App development expert vs agency — which is better?
For most Indian small-to-mid businesses, a proven independent expert wins on cost and speed — you get direct access to the coder and no agency overhead, often at a fraction of a ₹5,00,000-plus agency quote. Choose a large agency only if you need a big team building several products at once. For a focused app, direct access beats a big org chart.
Should I build for Android, iOS, or both?
Most businesses should build for both, and cross-platform tools like React Native and Flutter let me do that from one codebase for roughly the cost of one. If your budget is tight, we can launch on Android first — it has the larger user base in India — and add iOS later from the same code.
Will my app be secure with user data and payments?
Yes. Mobile security is my core skill — I am CEH and CRTA certified. I use encrypted storage, validated APIs, and secure payment gateways like Razorpay, and I never bake secrets into the app. Insecure data storage is the most common app leak, and I close those gaps during development, not after.
Do you handle Play Store and App Store submission?
Yes. I handle the full submission to both the Google Play Store and Apple App Store, including the review process that trips up first-timers — store listings, screenshots, privacy declarations, and rejections. You keep ownership of the developer accounts. I just make sure your app actually gets published.
Kya ek hi app Android aur iPhone dono par chalegi?
Haan. Main React Native ya Flutter se banata hoon, jisme ek hi code Android aur iPhone dono par chalta hai. Isse aapka kharcha aur time lagbhag aadha ho jata hai. Zaroorat pade to native bhi bana deta hoon. WhatsApp karo 75175 72000 par.
Will I own my app and its code?
Yes, completely. After launch I hand over the full source code, the Play Store and App Store developer accounts, and documentation. The app is genuinely yours. You can keep me for updates or move to another developer any time. I never hold your app or accounts hostage.
Do you build the back-end and admin panel too?
Yes. Almost every app needs a back-end — the APIs, database, and an admin panel to manage users, orders, and content. I build that as part of the project so you can run the app yourself without calling me for every change. It is one connected system, one person accountable.
Can you turn my existing website into an app?
Yes. If you have a website, I can build a mobile app that shares the same data and back-end, so orders and content stay in sync. Depending on your needs that may be a true native-style app or an efficient hybrid. I will recommend honestly which one actually serves your users.
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