Digital Studio · GST Firm, Assam

Android Apps,
Games & AI Tools
Built in Assam.

Thoiba Trader is a registered digital studio in Assam, India. We make Android apps, games and AI tools, including Black UI, an AI dashboard that helps you build Android apps.

Explore Black UI → Browse Apps
3+ Live Web Tools
100% Self-Funded & Bootstrapped
Black UI
AI dashboard to chat, debug and build Android apps
Live →
Apps & Games
Kids' games, utilities and tools for Android
Live →
Web Tools
GSTR-1 Calculator, GeoLens, ShopSupplier
Live →
Phone-First
Apps, games and tools designed for Android and for how people actually use their phones.
Clear About Data
Every product has its own privacy policy that explains what it collects and why.
Built from Experience
Made by an active Amazon, Flipkart & KDP seller, so our tools solve problems we face ourselves.
GST-Registered
A registered firm based in Hojai, Assam, with a verifiable GST registration.

Apps & AI

What We're Building Right Now

Our focus is Android: an AI tool that builds apps, and a growing shelf of small apps and games.

Flagship Product

Black UI: chat, code, debug and ship an Android app from one screen.

Black UI is a multi-AI dashboard. Everyday conversation goes to Gemini, real coding and debugging goes to Claude, and the result can be turned into a signed APK or AAB through your own GitHub account.

  1. 1
    ChatAsk anything. Gemini handles conversation, drafting, images and PDFs.
  2. 2
    DebugPaste an error or attach a file and Claude works the fix in the chat.
  3. 3
    BuildGenerate a signed APK or AAB using your own GitHub Actions.
  4. 4
    ShipDownload the build from chat and install it or publish it anywhere.
Visit Black UI → Read the guide
Apps & Games

Small apps, made one at a time.

Our Android games for kids, utilities and tools live in one place, each with its own page and privacy policy. Several are listed on the Amazon Appstore.

apps.thoibatrader.com
Browse Apps →

What We Do

Engineering Built on Real-World Operations

Every skill we have was earned in the field, from Android builds to tax filings, marketplace logistics and satellite data APIs.

01
Android Apps & Games
Kids' learning games, utilities and tools shipped as APK and AAB, with store listings, screenshots and privacy policies handled end to end.
AndroidAPK / AABGames
02
AI Products
Black UI routes chat to Gemini and code work to Claude, then builds signed Android apps through the user's own GitHub. A structured Multi-AI Workflow sits behind everything we ship.
GeminiClaudeAPK Builder
03
FinTech & Tax Utilities
Deep understanding of GSTR-1, GSTR-3B, TCS/TDS deductions, HSN codes and e-commerce reconciliation, from lived experience as a registered seller.
GSTFinTechData Reconciliation
04
Geospatial & Data Intelligence
Integration of NASA/ISRO satellite APIs, USGS earthquake feeds, Open-Meteo ERA5 climate data and OpenStreetMap for rich geographic analysis tools.
GISBig DataPredictive APIs
05
Serverless & E-Commerce Systems
Cloudflare Workers/Pages and Firebase for edge-deployed apps, plus multi-tenant supplier dashboards, WhatsApp order notifications and SEO-indexed catalogs.
CloudflareFirebaseWhatsApp API
06
Digital Publishing & KDP
Active Amazon KDP publisher with hands-on experience in digital distribution, content SEO, royalty structures and marketplace ranking. Stories and ebooks are a side track to the app work.
Amazon KDPDigital AssetsContent SEO

Web Tools

Three Live Web Tools. Three Real Problems Solved.

Each tool started with a problem we ran into while selling online, or one that sellers around us kept facing.

Web Tool 01
GSTR-1 Calculator
gstr1calculator.in
Indian e-commerce sellers on Amazon & Flipkart faced a painful monthly tax reconciliation problem: manually calculating GSTR-1 across thousands of orders and multiple tax slabs. We built a browser-based tool that accepts the raw sales report and produces a GSTR-1-ready breakdown instantly. Your raw files stay in the browser and calculation data is not stored.
FinTech Browser-Based GST
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Web Tool 02
GeoLens
geo.thoibatrader.com
Before buying land or starting construction, buyers had no easy way to assess environmental risk. GeoLens pulls 10 years of historical data (flood risk, slope, elevation, seismic activity) from satellite APIs and generates a downloadable PDF risk report with 5-year predictive analysis, all from a single map pin.
GIS Satellite APIs Predictive
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Web Tool 03
ShopSupplier
shopsupplier.thoibatrader.com
Small offline suppliers feared the cost and complexity of going digital. ShopSupplier gives any supplier a personal shareable catalog link, a Firebase-backed dashboard, real-time WhatsApp order notifications and Google-indexed product pages for organic traffic, at near-zero hosting cost.
E-Commerce Multi-tenant WhatsApp
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Technology Stack

Modern, Lean, and Cost-Efficient

Android (APK / AAB)
GitHub Actions
Cloudflare Workers
Firebase
Gemini + Claude AI
Razorpay

Work With Us

Need an App or Tool
Built Properly?

If you need an Android app, a lean web tool or an AI-powered product built by someone who understands your market from the inside, let's talk.

Get in Touch → Read Our Story

FAQ

Frequently Asked Questions

Answers to what most users and clients want to know before reaching out.

What exactly does Thoiba Trader do?
We are a GST-registered digital studio based in Lanka, Hojai district, Assam. We build Android apps, games and AI tools, including Black UI, along with lean web tools for users and businesses.
What is Black UI?
Black UI (blackui.thoibatrader.com) is a multi-AI dashboard. Sign in with Google to chat with Gemini, debug code with Claude and build a signed Android APK or AAB through your own GitHub account.
Where can I find your Android apps and games?
Our Android apps and games, along with their privacy policies, are at apps.thoibatrader.com. Several are also listed on the Amazon Appstore.
What is the GSTR-1 Calculator, and who should use it?
The GSTR-1 Calculator (gstr1calculator.in) is a browser-based tool for Meesho, Amazon and Flipkart sellers. Upload your platform reports and it generates a GSTR-1-ready Excel summary with state-wise, HSN-wise and nil-rated tables. It is pay-per-report, starting at ₹49, with no subscription. Your raw files are processed in your browser; see the product's privacy policy for details.
What is GeoLens and who needs it?
GeoLens (geo.thoibatrader.com) is a satellite-based land intelligence platform. Drop a pin on any location in India and get a downloadable PDF report covering flood risk, slope, elevation, seismic activity and a 5-year predictive outlook, built from 10 years of historical satellite data. Ideal for land buyers, builders and developers who want to assess risk before investing.
What is ShopSupplier?
ShopSupplier (shopsupplier.thoibatrader.com) is a B2B digital catalog platform for offline suppliers who want to go digital without high costs. It gives any supplier a shareable catalog link, a Firebase dashboard, real-time WhatsApp order notifications and Google-indexed product pages, at near-zero hosting cost.
Is Thoiba Trader a registered business?
Yes. Thoiba Trader is a GST-registered trade firm based in Lanka, Hojai district, Assam, India.
Can you build a custom app or tool for my business?
Yes. If you have a specific problem that needs a lean, cost-efficient solution, we would like to hear it. We build Android apps, serverless web apps, FinTech utilities, GIS platforms and B2B e-commerce systems. Email us at [email protected] to start a conversation.