Services / Development
Web & app development
We build websites, web services, iOS and Android apps, and internal tools.
Services built and run by TNT
Pairday
Records working hours and calculates pay, including Korea's weekly holiday and night-shift allowances, and estimated take-home pay.
Flobi
Staff management, schedules, payroll, electronic employment contracts and payslip delivery. Web and app.
mojibox
Copy emoji and special characters, or convert text into Instagram fonts. Korean, English, Japanese and Spanish.
TNT Tour
Consultation for packages, custom trips, flights and hotel bookings. Travel guides in Korean and English.
jkhotdeal
Compares multipack prices by converting them to a price per item or per 100 g.
How the project works
Discuss the project
We look at who will use the service, what they need to do and how they do it today.
- You prepare
- What you want to build, what is ready and reference services
Discussion notesFeature list
Agree on scope and quote
Define the scope and completion criteria for each feature, keeping unresolved items separate.
Scope of workQuotation
Review screens and build
Development follows the client’s review of the main screens and flows. Change requests record their scope and schedule impact.
Screen flowChange request
Acceptance testing
Test actual user flows against agreed scenarios, and list errors and unfinished items.
- You prepare
- Try the product and give review feedback
- TNT handles
- Fix errors
Test scenariosAcceptance record
Deploy or prepare store submission
For websites, prepare the domain, hosting and deployment. For apps, prepare the submission build and review materials.
- You prepare
- Prepare domain and store accounts
- TNT handles
- Store submission and responses to review rejections
Store text and imagesReview information
Handover
We hand over all source code, original design files and accounts to the client, except when the client entrusts operations and management to TNT. Passwords and keys are shared separately, not written into the document.
- You prepare
- Confirm receipt
Handover listOperating guide
What we need for a quote
We quote each project based on its feature scope and include a scope table.
Web & app development
- What to build: website / web service / mobile app / internal tool / improvements to an existing service
- What is ready: idea only / specification / design / a live service
- Features: sign-up and login / payments / bookings / admin screens / notifications / maps and location / languages / integrations / file uploads / unsure
- Reference service links (optional)
- Your target launch date: within 1 month / 1–3 months / later than 3 months / undecided
- Support after launch: needed / not needed / discuss
- Budget
Mark undecided items as “unsure” or “decide after discussion.”
Frequently asked questions
How do I choose between a website, web app and mobile app?
Compare where people will use it, whether installation is needed, device features such as the camera or push notifications, and operating costs.
What should I check in a quote?
Check whether design, content, admin screens, integrations, testing and launch support are included. Domain, server, payment processing, map and messaging fees are charged by the respective providers.
Does receiving the source code transfer all rights to me?
File delivery and rights transfer are separate matters. Copyright, external open-source licenses and ownership of server or domain accounts need separate terms. Have a legal specialist review rights agreements and privacy policies. App transfers between developer accounts have their own process.
Is an app ready for store release once development ends?
Apple and Google determine approval and timing through store review. Apple asks for information and accounts that let reviewers access the app's features. Google has closed-testing requirements for new personal developer accounts created after November 13, 2023. Policies are checked again when preparing a release.
Apple review information Google Play personal account testing requirements
How do fixes and maintenance differ after completion?
Maintenance fees are agreed separately based on the service size and management scope. Error fixes, content changes and added features are discussed as separate tasks. Published Korean software standard contracts also distinguish development from maintenance.
Send a development inquiry
Describe the service you want to build and add any reference links in the inquiry form.