Website & Web App Development
Fast, secure web applications and websites built specifically for you — from marketing sites to complex dashboards and portals.
Mobile App, Website & AI Development Company in Chennai
Software that grows revenue. scales with you. thinks for itself. customers love.
From our office in Alwarpet, Chennai, we build Android & iOS apps, websites, SEO and AI systems so sharp they outpace the competition — on price, on quality and on speed of delivery.
0+Projects shipped
0+Happy clients
0+ yrsEngineering experience
Performance-firstfast, secure builds
Deployedproduction · just now
2× reachorganic traffic
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ReactNext.jsFlutterKotlinSwiftNode.jsPythonLangChainOpenAI & LLMsPostgreSQLFirebaseAWSTechnical SEO
About us
A Chennai software company that ships like a product team.
One by Two Technologies is a team of tech professionals with 5+ years of experience. Everything we build is crafted for your specific need, delivered on time, and written to stay maintainable and robust long after launch.
- Built for your businessNo templates — every system is designed around how you actually work.
- Clean, future-proof codeReadable, tested and easy to extend as you grow.
- End-to-end deliveryFrom mobile apps and SEO-optimised websites to AI systems.
What we do
App, web, SEO and AI services in Chennai — one accountable team.
Pick one service or combine them — we plan, design, build and support the whole thing under one roof.
Android & iOS App Development
All your business and personal needs, inside your pocket — on Android and iOS.
SEO Services
Get found by the customers already searching for you, with technical SEO and content that ranks organically on Google.
AI & Automation
From RAG systems to autonomous AI agents for automation — we put AI to work on real business problems.
Selected work
Websites, apps and AI we have built for clients.
A snapshot of what we've shipped across web, AI and mobile for clients in Chennai and beyond.
Jayaram & Associates
A highly optimised, modern website for an audit and consultancy firm — built for speed and search visibility, enabling the business to gain real traction online.
2×Customer reach
SEOOptimised build
SQLAI — speak to your data
A natural-language-to-SQL agent: upload a dataset, ask a question in plain English, and get the answer back — no query writing required.
NLPHuman speech → SQL
LLMAgent pipeline
KadaiX — POS billing & inventory
A fast, offline-first POS billing app for shops, retailers, bakeries and restaurants: create bills in seconds, manage products and sales, take UPI payments with dynamic QR codes and print receipts over Bluetooth or Wi-Fi.
AndroidLive on Google Play
POSBilling & inventory
OfflineNo sign-in needed
Our free apps
Free Android apps built by our team.
Business and everyday apps we design, build and maintain ourselves. All of them are free to download on Google Play.
Wicketly – Smart Cricket Scorer
Smart offline cricket scoring with auto stats & live presentation.
Get it on Google Play
KadaiX
Fast POS billing, sales & inventory made easy.
Get it on Google Play
GymSpydey
Offline gym management with attendance, billing, inventory & expenses.
Get it on Google Play
StyleDesk
Salon billing, invoices, clients, staff and inventory in one app.
Get it on Google Play
CRM Desk – Leads Manager
CRM to manage customers, leads, deals & tasks.
Get it on Google Play
Enquify – Enquiry Management
Smart enquiry management for growing businesses.
Get it on Google Play
PayTone – UPI Mobile Alerts
Hear UPI payment notifications aloud. No soundbox needed.
Get it on Google Play
Gate Pass Manager
Easy, secure and local gate pass management.
Get it on Google Play
Invest Tracker – SIP & MF Tracker
SIP & mutual fund portfolio tracker.
Get it on Google Play
Mumtaj Dental Care
View your dental reports and manage your treatment history.
Get it on Google Play
Dont Touch – Anti-Theft Alarm
Protect your phone with an alarm & intruder selfie on touch.
Get it on Google Play0+Finished projects
0+Happy clients
0Skilled experts
0Core disciplines
How we work
Our app and web development process, in four steps.
No black boxes. You know what's happening at every stage, and you see progress every week.
01
Discussion
We talk with you to understand your requirements and propose a clear scope.
02
Analysis
Our team researches and designs the best solution, then walks you through it.
03
Plan & execute
We get straight into action and build within the agreed time frame.
04
Deliver
Your satisfaction is our top priority — we launch, support and keep improving.
Client stories
What our clients in Chennai say.
“The mobile application development was rapid and straightforward. As a business owner struggling to get ahead of the digital competition, One by Two helped me immensely.”
“I've run an event management business for over a decade. As the market shifted online we couldn't keep up — so One by Two built our websites and apps.”
“Their website and SEO work doubled our customer reach. We've worked with them since, and can attest to their excellence and professionalism.”
“The mobile application development was rapid and straightforward. As a business owner struggling to get ahead of the digital competition, One by Two helped me immensely.”
FAQ
Questions about app and website development
Can't find what you're looking for? Call +91 98656 33310 and talk to an engineer directly.
Do you build both Android and iOS apps?
Yes. We build mobile apps for Android and iOS, and can publish them to the Google Play Store and Apple App Store for you.
Where is One by Two Technologies located?
Our office is on the 5th Floor, Mookambika Complex, Alwarpet, Chennai. We work with clients across Chennai, Tamil Nadu and the rest of India.
How long does it take to build a website or app?
It depends on the scope. After an initial discussion we analyse your requirements and give you a clear plan and timeline before any work begins, and we deliver within that time frame.
Will my website be SEO-friendly?
Yes. Every website we build is fast, mobile-friendly and SEO-ready, and we also offer ongoing SEO services to help your business rank in Google organic search.
What AI solutions do you build?
We build RAG (retrieval-augmented generation) systems, AI agents for automation, and natural-language tools such as our speech-to-SQL agent that lets people query data in plain English.
How do I get a quote?
Call us on +91 98656 33310 or email contact@techonebytwo.com. We will discuss your project and send you a plan.
Let's talk
Have a project in mind? Let's build it.
We'd love to hear from you. Tell us about your idea, a problem you need solved, or just ask a question — we usually reply within one business day.
Call us anytime+91 98656 33310
Send an emailcontact@techonebytwo.com
Our office5th Floor, Mookambika Complex, Alwarpet, Chennai