Skip to content

Mobile Apps Your Customers Keep on Their Phones

We design, build and launch iOS and Android apps with native-grade performance, clean code you own, and a team that stays with you after launch.

Book a free consultationWhat's included
Book a free consultationWhat's included

Mobile app development built around how people actually use their phones

Mobile app development covers everything from the first screen sketch to the build that passes App Store and Play Store review. A good app loads fast on a mid-range Android phone, keeps working on a patchy network, and asks for permissions only when it needs them. Getting those details right decides whether people keep the app or delete it within a week.

Our clients are startups shipping a first product, retailers adding an ordering channel, and operations teams replacing paper with a field app. Some need a consumer app with payments and notifications. Others need an internal tool that syncs with an ERP and works offline in a warehouse. The platform choice, native or cross-platform, follows from those needs, not from our preference.

Nexzem starts with a short discovery to fix scope, screens and integrations, then builds in two-week sprints with a test build on your phone at the end of each one. You see progress, not status reports. When the app goes live, we handle store submission, crash monitoring and the first round of updates, and you keep 100% of the source code.

Tap through it before we build it

A sample prototype made from the modules below. Pick a device, then use the button on the screen to move through the flow.

Our Mobile App Development services

Native and cross-platform iOS and Android apps built for real users, from first MVP to scale.

  1. 01

    iOS App Development

    Swift and SwiftUI apps that follow Apple's Human Interface Guidelines, support current iOS releases, and clear App Store review without repeated rejections.

  2. 02

    Android App Development

    Kotlin apps tested across screen sizes and Android versions, tuned for the low-memory devices many of your users in India and abroad still carry.

  3. 03

    Cross-Platform Apps

    One Flutter or React Native codebase for iOS and Android, cutting build and maintenance effort while keeping smooth scrolling, animations and device access.

  4. 04

    MVP Development

    A focused first release with the few features that prove demand, structured so it can grow into the full product without a costly rewrite.

  5. 05

    Offline-First Apps

    Local storage and background sync so field staff, delivery riders and rural users keep working when the network drops, with changes uploaded later.

  6. 06

    Payments and Notifications

    Razorpay, Stripe, in-app purchases and push notifications wired in with proper receipts, retries and opt-in handling that meets each platform's rules.

  7. 07

    App Modernisation

    Rebuild or refactor an ageing app, fix crash hotspots, update the SDKs the stores now require, and migrate users without losing any of their data.

  8. 08

    App Store Launch

    Store listings, screenshots, privacy labels, signing certificates and staged rollouts handled for you, so launch day is not spent fighting review queues.

Settings

Mobile App Development with Nexzem: what you get

  • You own the code

    Source code, signing keys and store accounts sit in your name from day one, so there is no lock-in if you later move work in-house.

  • A build to test every sprint

    A fresh test build reaches your phone every two weeks, so feedback lands while changes are still cheap to make.

  • Performance on real devices

    We test on budget and flagship phones, not only simulators, and fix slow screens before your users find them.

  • Support after launch

    OS updates, crash fixes and new features continue under a support plan, handled by the same team that wrote the code.

Where Mobile App Development fits

  • Ordering app for a restaurant chain

    Customers browse menus by outlet, customize dishes, pay online and track orders in real time, while loyalty points and personalized offers bring them back. Orders flow straight into kitchen screens and the chain's point-of-sale system.

  • Offline field service app

    Technicians receive daily jobs, view equipment history, capture photos and customer signatures, and record parts used even without network coverage. Data syncs automatically when the phone reconnects, replacing paper job sheets and end-of-day data entry.

  • Patient app for a clinic network

    Patients book appointments, join video consultations, view prescriptions and lab reports, and receive reminders. Access controls and encryption protect health data, and the app integrates with the clinic's existing practice management software.

  • Retail loyalty app

    A retail chain replaces plastic cards with a mobile wallet pass and app, offering points, digital receipts, store locator and targeted push offers based on purchase history, giving marketing a direct channel to repeat customers.

  • Sales rep ordering app

    Distributor sales reps visit retailers, check stock and pricing, place orders and collect payments from a tablet, with credit limits enforced automatically and orders synced to the ERP for same-day dispatch planning.

How to choose a mobile app development company

Look at apps the company has shipped and still maintains, not only screenshots. Download them, check store ratings and recent update history, and ask what happened in the months after launch. A partner that has handled store rejections, crash spikes after OS updates and scaling problems will plan for them in your project instead of discovering them at your expense.

Ask who will actually work on your app, how often you will receive test builds, and how quality is checked on real devices. Confirm in the contract that you own the source code, design files and store accounts. The questions below help compare proposals that otherwise look similar on paper.

Communication style matters as much as technical skill. Agree how decisions are recorded, who approves design changes and how scope changes are priced. A partner that writes short weekly summaries, raises risks early and demonstrates working builds rather than slides usually delivers a smoother project than one that only reports percentages complete.

  • Which devices and OS versions will you test on?
  • How will we receive and review builds during development?
  • Who publishes the app, and under whose developer account?
  • How do you handle crash monitoring and analytics?
  • What does post-launch support include, and what costs extra?

Common mistakes in mobile app projects

Trying to launch with every feature is the most expensive mistake. A long first release delays learning, and many features turn out to be rarely used. Other common problems include designing only for the latest flagship phones, skipping offline and poor-network states, leaving analytics until after launch, and underestimating the backend, admin panel and integrations that a useful app depends on.

Store policies catch teams out as well. Payments for digital goods, account deletion requirements, privacy disclosures and permission requests all need planning early, because late changes can delay approval right when marketing is ready to launch. Reading the current App Store and Google Play guidelines during design, not after development, avoids most of these delays.

Planning for life after launch

An app is never finished. Apple and Google release major OS versions every year, devices change, and third-party SDKs for payments, maps or analytics publish updates that sometimes become mandatory. Budget for regular maintenance releases, monitor crash-free sessions and app store reviews, and keep dependencies current so urgent fixes are quick rather than painful.

Use analytics to guide the roadmap. Track where users drop out of onboarding, which features drive retention and which screens are slow, then plan small, frequent releases. Staged rollouts and feature flags let you ship improvements safely and roll back quickly if a release causes problems.

Plan the support model before launch as well. Decide who triages user reviews and support emails, how quickly critical bugs must be fixed, and who holds the signing keys and store account access. Clear ownership means a broken payment flow on a weekend becomes a short incident instead of a lost week of sales.

How Mobile App Development engagements run

Clear stages with a review at the end of each, so you always know what happens next and what it costs.

  1. Stage 1now

    Discovery and Scope

    We map users, core flows and integrations, then agree a feature list, platform choice and fixed quote.

  2. Stage 2after sign-off

    Clickable Prototype

    Wireframes become a tappable prototype you can show users and investors before any code is written.

  3. Stage 3after sign-off

    Sprint Development

    Two-week sprints with a test build each cycle, code review on every change, and automated tests on core flows.

  4. Stage 4after sign-off

    QA on Real Devices

    Functional, performance and battery testing across a device list that matches your audience.

  5. Stage 5after sign-off

    Launch and Support

    Store submission, staged rollout, crash monitoring and a support plan for updates and new features.

Technologies we use for mobile app development

Proven, well-supported tools chosen for your scale, budget and team, never for novelty.

  • Flutter
  • Swift
  • Kotlin
  • React
  • Android
  • iOS
  • Firebase
  • Node.js
  • TypeScript
  • Appium

Services that pair with Mobile App Development

All 100 services

More in Mobile & Web

Mobile App Development FAQs

Something else on your mind? Ask a consultant and get a reply within one business day.

How much does it cost to build a mobile app?

Cost depends on the number of screens and user roles, whether you need iOS, Android or both, integrations such as payments or maps, and whether an admin panel is required. A single-platform MVP and a multi-role marketplace app sit far apart. After a free consultation we send a fixed quote with a feature-by-feature breakdown.

How long does mobile app development take?

A focused MVP usually takes 8-14 weeks from signed scope to store submission. Apps with several user roles, admin dashboards and complex integrations take longer. We share a sprint plan with dates up front, so you know what ships when.

Should I choose native or cross-platform development?

Flutter or React Native suits most business apps and saves effort by sharing one codebase. Native Swift and Kotlin make sense for heavy graphics, deep hardware access, or when one platform dominates your audience. We recommend based on your features and budget, not habit.

Who owns the app and the source code?

You do. The source code, design files, signing keys and store accounts all belong to you, and we sign an NDA on request before you share any details of your idea.

Do you help with App Store and Play Store approval?

Yes. We prepare listings, privacy declarations and reviewer notes, submit the builds, and fix anything a reviewer flags. Most rejections come from missing privacy details or login problems, which we check before submitting.

What happens after the app goes live?

We offer monthly support covering crash fixes, OS and SDK updates, minor changes and monitoring. New features can be scoped as fixed projects or handled by a dedicated team billed per seat each month.

Can you build an app that works offline?

Yes. We design offline-first apps that store data locally, let users keep working without a connection and sync changes when the network returns. The design includes conflict handling for records edited on several devices, clear indicators of sync status and safeguards so nothing is lost if the app closes mid-task.

How do you keep a mobile app secure?

We use secure authentication, encrypt data in transit and on the device where needed, keep secrets out of the app bundle, and validate everything on the server rather than trusting the client. We follow OWASP mobile guidance, review third-party SDKs, and can arrange penetration testing before launch for apps handling payments or personal data.

Does our app need its own backend?

Most apps do, to store user accounts, data, payments and content shared across devices. Depending on complexity, this can be a backend-as-a-service like Firebase or Supabase, or a custom API with an admin panel. We recommend the simplest option that supports your features, security needs and expected growth.

Since our first project

Happy clients
250+
Projects delivered
150+
Industries served
15+
Pricing and engagement models

  • Mutual NDA first

    Signed before any detailed discussion of your idea.

  • You own the code

    100% of the source code and IP is yours on delivery.

  • Reply in one business day

    From a solutions consultant, Mon to Sat, 09:30 to 18:30 IST.

  • Estimate in 48 hours

    A fixed quote or team estimate, broken down by milestone.

Serving clients in

Tell us what you're building.

A solutions consultant replies within one business day with next steps, a rough estimate and a suggested team.

Book a free consultation+91-7302622997