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CHIMBUK.

Try flutter, ai, pricing or sudoku

App, Web & AI Development Solutions — Bangladesh

Software that helps your business grow.Mobile apps, websites and AI tools — built and supported by one team you can reach.

Chimbuk is a product studio in Bangladesh: we design, build and maintain the apps your customers use and the systems your team runs on. Fixed scope, written support, senior builders from the first call to the last update — and our own live apps on Google Play prove how we work.

Start a project See our work

  • 3 apps

    Own products live on Google Play

  • 2019

    Building since

  • Bangladesh

    Based in

[02b]Concept Lab

Popular app concepts, rebuilt live in your browser

89+ working screens across 12 product concepts — ride-sharing to neobanking. Not screenshots: every frame is real code running in this page, openable in dev tools, built as one codebase for phone, tablet and web.

Open the Lab →

Original concept studies — clearly labelled, since claiming real clients we don't have isn't our style.

[01]Capabilities

Everything your business needs,
under one roof.

Apps, websites, AI tools, branding and marketing — each service documented with what is included and how it is delivered. Hire one team, not five vendors.

All services →
  1. 01AI & Automation DevelopmentLLM features, assistants and workflow automation wired into products — with honest evals, not demo magic.
  2. 02Mobile App DevelopmentFlutter & native products engineered for release — and for year three, on every device your customer owns.
  3. 03Web DevelopmentFast, findable sites and platforms — SEO, a11y and performance designed in, not retrofitted.
  4. 04UI/UX & Product DesignInterfaces with intent — flows, states and systems that engineers can build without asking twice.
  5. 05E-commerce SolutionsCommerce operations software — storefronts, inventory, local payments and the boring parts done right.
  6. 06Custom Software & CloudAPIs, internal systems and cloud infrastructure — security rules and backups designed in.
  7. 07Graphic Design & BrandingIdentity systems, marketing kits and product art — design that survives print, Play Store and pixel density.
  8. 08SEO & Growth EngineeringEngineering-grade SEO: Core Web Vitals, structured data, indexing hygiene — code fixes, not content farms.

[03b]Flutter-first engineering

One codebase. Every screen your customer owns.

We build with Flutter — Google's open UI toolkit — because your users don't care which store the app came from. One Dart codebase compiles to Android, iOS, web and desktop with the same design system, the same state logic, the same release day.

  • 60fps everywhere

    Impeller rendering — smooth on ৳12k Androids, crisp on Retina iPhones.

  • Hot-reload velocity

    Design fixes land in seconds during builds; you see progress live.

  • Web + admin included

    The same widgets power your back-office console — no second project budget.

  • One team, one fix

    A bug dies once and stays dead on every platform.

Full declared stack →
9:41

Safety

Everything you'd hope never to tap

Search or paste a link…
  • SOS — alert contacts + 999armedHeld for 2 seconds · works offline
  • Share live trip linkExpires at drop-off
  • Audio trip recordEncrypted, device-only until flagged
  • Report driverRides paused during review

Same concept · phone frame + web frame · same components

[02]Selected work

Work you can verify

All projects →
  • Studio render of Sudoku Master running on a MacBook and Android phone — dark navy UI with jade highlights
    Puzzle / Brain training2024
    Own product — verifiable

    Sudoku Master

    Offline-first sudoku on Android — guided hints that teach the logic instead of spoiling it.

    See what's verified

    Sudoku Master
  • Studio render of Money AI expense tracker on phone and web dashboard with charts
    Finance / Productivity2025
    Own product — verifiable

    Money AI — Expense Tracker

    Expense tracking with XP, levels and streaks — privacy-first: local data, optional user-owned Drive sync.

    See what's verified

    Money AI — Expense Tracker
  • Studio render of Invoice Maker on laptop and Android phone, invoice list and preview
    Business tools2026
    Own product — verifiable

    Invoice Maker

    Professional invoicing for freelancers and small shops — six PDF templates, 140+ currencies, works fully offline.

    See what's verified

    Invoice Maker
  • Studio render of the rebuilt chimbuk.com on MacBook and phone with peak logo and contour motif
    Platform / In-house2026
    Own product — verifiable

    This website — the Chimbuk platform

    This site: a hand-built Next.js 16 + Tailwind design system with a Firebase CMS pipeline planned for the backend phase.

    Read the entry

    This website — the Chimbuk platform

Cover images are studio-made product mockups, labelled as such on every page — no stock photography, no borrowed screenshots. Client cases expand only with written permission.

12

product concepts in the Lab

89+ live screens

3

own apps on Google Play

updated this quarter — public record

08

practices under one roof

AI → mobile → web → design → commerce → cloud → brand → growth

100%

static & server-rendered

Lighthouse-gated, no client bloat

[03]Why Chimbuk

Why owners keep the work coming back

  • 01

    AI only where it pays for itself

    We add AI when it removes real work, with the costs written down. If your process does not need AI, we say so — that answer is also a deliverable.

  • 02

    We run what we sell

    Three consumer apps live under our own Google Play account, updated every quarter. Your project ships through the same pipeline ours does.

  • 03

    The people you meet are the people who build

    A deliberately small studio: senior engineers and designers carry your project from first call to final update. No hand-off roulette.

  • 04

    Fixed scope, priced changes

    Milestones against a signed brief; any change quoted at pre-agreed rates. Knowing the number is the feature.

  • 05

    You own everything

    Repositories, cloud accounts, store listings and design files live in your organisation from day one. You can leave with it all, any time.

  • OpenAI API
  • Gemini
  • RAG / pgvector
  • Next.js
  • TypeScript
  • React Native
  • Flutter
  • Kotlin
  • Firebase
  • Node.js
  • Tailwind
  • PostgreSQL
  • Play Console
  • Lighthouse CI
  • axe
  • zod
  • sGTM
  • OpenAI API
  • Gemini
  • RAG / pgvector
  • Next.js
  • TypeScript
  • React Native
  • Flutter
  • Kotlin
  • Firebase
  • Node.js
  • Tailwind
  • PostgreSQL
  • Play Console
  • Lighthouse CI
  • axe
  • zod
  • sGTM

[05b]The growth playbook

We show you the map before we sell you the plane

Every engagement starts from these four moves — you keep this framework whether or not you ever hire anyone. It's the same order we run ourselves; the scroll below is the whole method in four steps.

  1. STEP 01

    Diagnose before you digitise

    Most businesses don't have a software problem; they have a leak — leads lost on WhatsApp, repeat customers untracked, inventory guessed. Map one week of real operations before commissioning anything.

    • Where do customers actually find you?
    • Which 20% of work eats 80% of hours?
    • What data already exists (order books, spreadsheets)?
  2. STEP 02

    Ship the smallest honest product

    A booking app that replaces 200 daily calls is worth more than a 'digital transformation' platform nobody finishes. One flow, done properly, in weeks — then iterate against usage, not opinions.

    • One user journey, end-to-end, delightful
    • Real data from day one (no fake-door builds)
    • Launch checklist: stores, analytics, backups
  3. STEP 03

    Let the product sell while you sleep

    Now the compounding starts: SEO-visible catalogue, app-store presence, push that respects the user, referral loops with honest numbers. This is where 'growth' stops being a poster word.

    • Search indexing + structured data wired
    • Retention: notifications with a budget (yours)
    • Measure: cohort charts, not screenshot metrics
  4. STEP 04

    Add the AI layer once the rails exist

    With real traffic and real data, AI earns its keep: support deflection over your own docs, demand forecasting, catalog enrichment. We audit, price and ship it with evaluation sets — or tell you to wait. Waiting is often right.

    • Use-case audit + skip-list in writing
    • Cost per action modelled at 10× traffic
    • Human fallback on every AI path

[04]Own products

Our own apps are live on Google Play

Not portfolio pieces — real products with public update histories, maintained with the same discipline your project gets.

  • com.chimbuk.sudoku_master

    Sudoku Master

    Offline-first sudoku on Android — guided hints that teach the logic instead of spoiling it.

    Open on Google Play ↗

  • com.chimbuk.expense

    Money AI — Expense Tracker

    Expense tracking with XP, levels and streaks — privacy-first: local data, optional user-owned Drive sync.

    Open on Google Play ↗

  • com.chimbuk.invoice_maker

    Invoice Maker

    Professional invoicing for freelancers and small shops — six PDF templates, 140+ currencies, works fully offline.

    Open on Google Play ↗

[05]Process

Five steps, every project

How we price & run →

  1. Discovery

  2. Design

  3. Build

  4. Launch

  5. Support

[06]FAQ

The first questions, answered straight

All answers →
How do you work with international clients?
Remote-first: two fixed daily overlap windows with your region, one shared milestone board, and a written weekly note — shipped, blocked, next. Decisions live in documents, so nothing waits on a meeting.
I see Firebase mentioned — is the backend already built?
This site launched frontend-first: content runs through a typed, adapter-based layer with a local source. The Firebase integration (Firestore content, Auth-based admin, Storage media) is the planned next phase; nothing in the UI will need rewriting for it.
How do we start?
Send the rough version — a paragraph, a spreadsheet, a napkin photo. Within one working day you get either a discovery proposal or a straight 'we're not the right fit, try this' — both are useful answers.

[07]Insights

Insights from the studio

All posts →

[08]Site as evidence

Don't take the word “responsive” — take the corner and drag it.

The card beside this paragraph is our own interface in miniature. Grab its bottom-right corner and pull: the header, the headline and the card grid reflow at the container's width, not the window's — the same technique that keeps every real page honest from 320px to 1920px. It is CSS container queries, running live, with no JavaScript deciding layout.

The numbers below are this build's own printout — page counts, budgets and timings you could reproduce from the repository in an afternoon. For us that is the only kind of stat worth animating.

CHIMBUK.

Software that helps your business grow.

Apps

Android, live on Play

Web

Static, instant, themed

Live container query — this card is resizable

  • 0

    pages pre-rendered

    every route static at build time — this site has no server waiting to be slow

  • <0s

    production build

    83 pages generated in under three seconds on one worker

  • 0

    instant search docs

    whole-site index ships with the page; search costs zero requests

  • ≤0KB

    largest render

    every device render budgeted; this page ships megabyte-free

  • 0

    themes, every page

    dark and light are the same markup — a toggle, not a rebuild

  • 0

    layout pixels past the edge

    paint-layer clip enforced site-wide; mobile overflow is designed out, not patched

Begin the ascent

Bring the rough idea.
Leave with a plan.

One paragraph is enough to start — we reply within a working day with questions, a direction, and whether we're the right studio for it.

Start a project →WhatsApp