Data in real time,decisions by AI.
EV & Gas reads live fuel prices and charger status nationwide to pick the best stop, and AI Talk Assistant pulls the conversations that matter out of 10 messengers, and DocBee shrinks and copies the documents you need to send. We build company websites and apps with the same technology.
Three services,
live today.
All three ship updates every week from user feedback. Every screen below is the real app.
From the cheapest gas
to open EV chargers.
Opinet fuel prices and the Ministry of Environment's EV charger data on one screen. Enter a destination and AI picks gas or charging stops on the way, weighing detour time and fuel cost. Fuel, charging and maintenance spending builds up in the car log. Available in Korea, in Korean.
Featured on the KNOC official blog“Introducing private companies putting public data to work” · Sep 4, 2026
Deleted messages stay,
important chats never slip by.
Notifications from 10 messengers, including KakaoTalk, LINE, Telegram and SMS, gathered by chat room. Read first without read receipts, get alerted when your name comes up in a group chat, and let AI summarize long conversations.
Shrink it, copy it,
open anything.
Shrink PDFs and photos to fit upload limits, make ID copies with the numbers hidden, and open HWP, PDF, DOCX, XLSX and ZIP files right on your phone. Viewing, compressing, converting and cleanup all run on the device, so your documents never leave it.
Six features
where AI does the work.
These are AI features live in our services today. We add the same capabilities to client products.
AI route picks
Picks gas and charging stops on your way, weighing detour time and fuel cost.
AI assistant
Understands a plain request and goes straight to search, navigation or logging.
AI receipt reading
Reads a fuel or charging receipt photo and fills in amount, volume and unit price.
One-sentence logging
Pulls date, amount and item out of one sentence and logs the expense.
AI car lookup
Finds the right model and generation from just a name, even when it is not in the list.
AI chat summaries
Condenses a long group chat into a few lines so you catch the thread fast.
From idea
to live product.
One team designs, builds and runs the web, apps, servers and AI, with none of the gaps or overhead that come from work passing through many hands.
Running EV & Gas and AI Talk Assistant around the clock taught us real-time processing, incident response and applied AI. We bring all of it to client projects.
Fast launch
Websites in 2–4 weeks, a first app version in 4–8 weeks.
Legacy renewals
Even sites over ten years old are rebuilt on a modern stack, with existing data carried over intact.
Full stack, one team
Planning, design, iOS, Android, web, servers and AI.
We own operations
After launch we keep watching: monitoring, incident response and new features.
An aging company website,
rebuilt like this.
A real, live site rebuilt with the same content, up to today’s standards: mobile support, an admin page and HTTPS.
Four things
we do well.
Our core is building and renewing websites, and developing apps. The same team carries on with admin screens and operations after launch.
Company websites · Renewals
We rebuild aging sites to be responsive, from company and product pages to careers.
Mobile apps (iOS · Android)
From planning to store review and launch. We build iOS and Android together with Flutter.
Admin · Backend · AI
Admin screens where your staff manage content, members and orders, servers and databases, plus AI features like summaries, recommendations and document reading.
Operations · Maintenance after launch
Server monitoring, incident response, new features and your customer support flow.
Built to the same standard
as our live services.
Websites in 2–4 weeks, apps in 4–8
We start from a one-page brief, then build, show and refine every week.
Lean quotes
One team covers planning, design and development, so there is no middle-management markup.
From payments to security
Payments, push, incident response, security. We apply the same checklist our live products run on.
The same team after launch
We keep looking after monitoring, new features and your customer support flow.
Have something to build?
One line is enough.
A one-line idea is fine. We reply within a day and send a quote and timeline within two business days.
contact@dksw4.comOpens your mail app. Just tell us what you want to build.
Business registration no. 582-35-01314
Gyeonggi-do, Republic of Korea