원온 — 건설현장 작업·정산

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About this app

If you only record what you did on-site verbally, your memories will differ when it comes time to get paid.

OneOn captures that day in 30 seconds, and the accumulated records become your work log.

■ Work Confirmation — It takes 30 seconds

· A confirmation form is created simply by entering the date, site, man-hours, and unit price.

· If you send a link or text message to your boss, they can open and sign it without installing the app.

· QR code, in-person signature, or signature via app — choose the method that best suits your site situation.

■ Work Log — Each day comes together to form a log.

· View where and when you worked on a calendar at a glance.

· View your work and earnings sequentially through a list by date.

· The confirmation form becomes your log without needing to write anything separately.

■ Money to be Received — Managed by scheduled payment dates.

· Money does not come in immediately just because you worked. The important thing is whether the scheduled settlement and payment dates have passed.

· View which client, how much, by when, and how many days are overdue in a single line.

· Send a polite notice to overdue clients on the spot.

■ Ledger — Accumulates by client.

· Invoices and receipts are organized by client.

· View monthly income and receivables at a glance.

■ Documents — Notify you before expiration.

· Manage expiration dates for safety and health training, basic safety and health, and various licenses.

· Receive advance notifications when expiration is approaching.

· Only qualification, insurance, and equipment documents are visible to the owner. ID cards and bank account copies are not shared.

■ When working with foreign workers

· The app supports 6 languages ​​— Korean, English, Chinese, Vietnamese, Russian, and Vietnamese

· You can change the language directly from the top right of the first screen

· If you write work instructions in Korean, they will be translated and displayed in the worker's language on their screen

■ Features for employers

· Workers will join automatically once you send out an invitation code

· Collect and review received confirmations and sign them all at once

· Create and send standard employment contracts and obtain signatures

· Deliver work instructions and announcements all at once

· Send heatwave warnings to ensure break times are taken

■ Pricing — OneOn is a free app

· Create and sign work confirmations, work logs, ledgers, document management, and receivables management

· Send via text message to your phone, QR code, link sharing, receive notifications, and identity verification

· All of the above features are free and will remain free. There is no cost to use them.

· Only two features are paid. This is because sending costs apply since the server "sends on your behalf" function.

① Automatic reminders sent via KakaoTalk to clients

② Automatic translation of work instructions

· You can try both of these for free for one month after signing up.

· Even if you do not use the paid features, you can continue to use the rest of the app as is.

· You can perform the same tasks for free — you can send reminders directly via text message on your phone,

and regarding work instructions, the app already supports 6 languages, so workers can view the screen in their own language.

· Payments cannot be made within the app yet. We are currently preparing payment methods, so please contact us below.

Inquiries: pcon1613@gmail.com / 043-716-1043
Keep a record of your work and payments with a single work confirmation. A free app connecting workers and employers.
Updated on
Oct 4, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • This app may collect these data types
    Personal info, Photos and videos and 3 others
  • Data is encrypted in transit
  • You can request that data be deleted

What’s new

• 명세서에 도장(날인)이 찍힙니다. 사업자뿐 아니라 일용직도 본인 실명 도장으로 찍힙니다.
• 사업자는 「거래명세서」, 일용직은 「작업명세서」로 양식이 갈립니다. 거래명세서에는 공급자·공급받는자가 좌우로 들어가고 업태·종목 칸이 생겼습니다.
• 작업확인서 첨부가 선택으로 바뀌었습니다. 명세서에 날짜와 일한 내용이 이미 줄로 들어가므로 기본은 꺼져 있고, 업체가 요구할 때만 켜면 됩니다.
• 거래처를 고르면 현장·단가·작업내용이 자동으로 채워집니다. 확인서 쓰는 자리에서 거래처를 바로 등록할 수 있습니다.
• 사업자 정보를 더보기에서 바로 넣을 수 있습니다. 넣으면 명세서가 거래명세서로 나갑니다.
• 비밀번호를 정할 때 한 번 더 확인합니다.
• 글자를 크게 쓰거나 한국어가 아닌 언어로 쓸 때 가입 화면과 버튼 글자가 잘리던 것을 고쳤습니다.
Content rating
Everyone
Users Interact
Learn more

App support

Phone number
+82437161043
About the developer
조영진
pcon1613@gmail.com
South Korea