About us

We build an easier, more convenient world

Our apps

From everyday apps to tools for work, we build software that is easy to use

CodeSand Co., Ltd. builds and runs its own web services and mobile apps. Rather than piling on features, we put convenience and a clear UI first, so anyone can use our products the moment they open them.

Web platform
We have our own CMS platform built as a base for multilingual web services, and we keep improving it. With modules such as a multi-vendor marketplace and e-learning, it lets us build the services we need quickly.
Mobile apps
We make everyday tasks, like preparing for exams, keeping track of D-days, opening Korean HWP documents and measuring noise, something you can finish with just your phone. We currently run four apps on iOS and Android.

Services

View all services
PaceMateExam prep
D-Day KeepCountdown & widgets
HanjjokDocument viewer
Sound MeterEveryday measuring

History

2026

  1. 08Launched Sound Meter on Android and iOS, for measuring and recording everyday noise such as noise from neighbors
  2. 05Launched Hanjjok on Android and iOS, which opens the Korean HWP files you receive right on your phone, no PC needed
  3. D-Day Keep launched on iOS, now on both app stores
  4. Launched PaceMate on Android and iOS, for preparing for many kinds of exams in one app

2025

  1. 05Launched D-Day Keep on Android, which counts down to the days that matter right on your home screen widget

2023

  1. 10Signed a contract to develop and manage operations for TrendHunter Class
  2. Launched an e-learning solution
  3. 06Signed a contract to develop and manage operations for TrendHunter B2B
  4. Unveiled a multi-vendor e-commerce solution
  5. 05CodeSand Co., Ltd. founded and official website opened

Company information

Email
support@reply.codesand.co.kr

Want to work with us?

For development requests, CMS platform adoption or operations support, send us a message through the contact form. We'll get back to you.

Contact us