BilSam Technologies
BilSam TechnologiesPrivate Limited
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Kolkata, West Bengal

Mobile App Development Company in Kolkata

Android and cross-platform apps built for real Indian users, low-end devices and unreliable networks — delivered for Kolkata businesses from our Pune office.

Kolkata is a city that combines an old trading economy with an IT belt at Sector V. We work here with businesses in banking, finance and insurance; IT and software services; and transport, fleet and logistics, and this page is about one thing: mobile app development for Kolkata. We work out of Pune and deliver to Kolkata remotely, with fixed weekly check-ins and travel when a phase genuinely needs people in one room.

Pune-based, working across East India

One office, stated plainly — no imaginary branch network.

Fixed-scope or dedicated team

Pick the engagement that fits the work, not a one-size retainer.

English • मराठी • हिंदी

Interfaces, documentation and support in the language your team uses.

Scope, NDA and invoices in writing

The paperwork your accountant expects, before work starts.

Why Kolkata businesses ask for mobile app development

Competition in Kolkata has moved online faster than most owners expected, and customers now compare before they call. mobile app development is how a business that is genuinely good at its trade stops losing to one that is merely easier to find and easier to deal with.

  • Work already happening around Salt Lake Sector V that nobody is recording properly
  • Owners answering questions that a report should answer
  • Customers who compare on a phone before they ever call
  • Staff time going into copying data between two systems

What a mobile app development project with us includes

Every item here appears in the written scope before work starts, so there is no argument later about what was included.

  • User flows agreed on paper before a line of code is written
  • One Flutter codebase for Android and iOS, so you are not funding two teams
  • Offline-first behaviour wherever the network cannot be trusted
  • Play Store and App Store submission handled end to end, including the policy paperwork
  • Crash reporting, analytics and push notifications from the first release
  • Signed builds and store credentials that belong to you, not to us

What we build it on

Boring, well-supported technology that another developer can pick up. We are not going to hand you something exotic that only we can maintain.

  • Flutter
  • Dart
  • Java
  • Firebase
  • REST APIs

Industries we work with in Kolkata

Kolkata is not one market. These are the ones we have the most context for, which shortens the part of a project where we are still learning your trade.

  • Banking, finance and insurance
  • IT and software services
  • Transport, fleet and logistics
  • Textiles, powerlooms and processing

How the work runs

  • Discovery call — 45 minutes on your process, not on our feature list
  • Written scope — screens, integrations, assumptions and what is deliberately out
  • Build in two-week slices — you see working software, not status decks
  • UAT with your own team, on your own data, before go-live
  • Go-live, documentation, admin training and an agreed support window

Engagement and budget

We do not publish a price list, because the honest number depends on scope. What we do commit to is a written estimate before you spend anything, milestone-linked billing, and proper documentation for your accountant.

  • Fixed-scope project — one agreed price, milestone payments
  • Dedicated team — monthly, for a roadmap that keeps moving
  • Consulting retainer — architecture and technical direction by the hour
  • Build plus training — we build it and train your team to run it

After go-live

  • A warranty window for defects, agreed in writing up front
  • Annual maintenance with a defined response time, if you want it
  • New features quoted separately — no surprise invoices
  • Your code, your hosting, your accounts: no lock-in of any kind

Kolkata & nearby

Salt Lake New Town Park Street Behala Howrah

Frequently asked questions

Do you actually work with businesses in Kolkata?

Yes, and we will be straight about how: our office is in Pune, and Kolkata clients are served from there. We work out of Pune and deliver to Kolkata remotely, with fixed weekly check-ins and travel when a phase genuinely needs people in one room. Nobody is going to tell you there is a local branch that does not exist.

How much does mobile app development cost in Kolkata?

We quote per project, after a discovery call. Scope, number of screens and integrations decide the number, so publishing a price list would only mislead you. What you get before spending anything is a written scope, a fixed timeline and a milestone-linked payment schedule.

How long will a mobile app development project take?

A focused first version usually lands in weeks rather than months, because we build in two-week slices and put the most painful part live first. A full rollout depends on how many of your processes come in scope — the written estimate says so per phase, not as one vague total.

Can you come to our office in Kolkata?

For kick-off, UAT and go-live, yes — those are worth travelling for and we build the trip into the plan. Routine reviews stay on video, which keeps your cost down and our attention on the work.

Can the app work in Hindi and regional languages?

Yes. Multilingual interfaces are normal for us — labels, notifications and printed documents in Hindi and regional languages as well as English. It matters more than people expect: staff on the floor use software far more willingly in the language they think in.

Do we need separate Android and iOS apps?

Usually not. We build in Flutter, so one codebase ships to both stores and a change is written once. Where a feature genuinely needs native code — deep hardware access, a payment SDK with no Flutter support — we write that part natively and keep the rest shared.

Who owns the Play Store account and the code?

You do. The app is published under your own developer account, the signing keys are handed over, and the source lives in a repository you control. We have no interest in holding a client hostage.

Talk to us about mobile app development in Kolkata

Tell us what the business does and where it hurts. You get a written scope, a timeline and a number — not a brochure. First conversation costs nothing.

BilSam Technologies — Kedari Nagar, Wanwadi, Pune, Maharashtra 411048