공셈이 - 시공현장 자재 계산기·현장관리

Gongsemi is an AI work partner for construction sites. It connects material calculations, estimates, work logs, schedule management, and team sharing—all tasks faced by workers at construction sites, including interior design, remodeling, and building construction—into a single app, helping to process repetitive on-site tasks faster and more conveniently.

[13 Types of Material Calculators]

Provides 13 types of quantity calculators for immediate use on-site. Calculations are based on domestic standards and standard cost estimates.

Calculate the required quantities and volumes by selecting standard presets or entering data manually.

If you enter unit prices for each item, the estimated cost (estimate) is calculated as well. (Pro)

[Work Log]

Save calculation results under the site name and review them at any time. Records are organized by site, allowing for immediate use in estimates and orders.

[Site Calendar] (Pro)

Check task deadlines on a monthly calendar. Colors are automatically assigned to each site, making it easy to identify which site's schedule belongs to at a glance. The site name is linked directly to the site name used in the calculator.

[Deadline Notifications]

Set deadlines for tasks to ensure you don't forget, and receive notifications.

[Team Sharing] (Pro)

Create a team and invite team members to view calculation records together in real-time. Personal records and team-shared records are separated and managed securely.

[Memos and Tasks]

Record on-site memos and tasks, and attach photos and files.

[Resource Center]

We have organized material specifications and labor and industrial safety standards necessary for construction. You can check specifications for tiles, wallpaper, films, etc., along with the latest (2026) minimum wage, labor standards, and construction site safety standards.

[Multilingual Support]

Supports Korean and English. It can be used not only at domestic sites but also with foreign workers and overseas sites.

[Offline First]

The calculator and records continue to function even at sites without internet access. Log in, and it automatically synchronizes across multiple devices.

[Pro Subscription]

Subscribing to Pro allows you to use the service without ads and access all features, including unlimited work record storage, unit prices and estimates by item, a site calendar, and team sharing. Recommended for:

Workers at all construction and building sites, including interior design, remodeling, and architecture

Those who manually calculated material quantities and estimates every time

Small construction teams and sites that want to systematically manage site schedules and work records

Gongsemi is constantly being updated. We will continue to add features needed on site.