YSL APPS is a suite of three apps developed by YSL Solution (Japan) together with leading general contractors Kajima, Toda, Takenaka and Nishimatsu. The product philosophy: not a tool that “can do it”, but a tool that “everyone on site can actually use”.
Figures published by YSL Solution (as of April 2025).
Too few experienced staff, tight schedules, and margins eaten up by rework and paperwork. These are the six problems YSL APPS was designed to solve.
Drawings change constantly and nobody is sure which version is current → demolition and rework.
Hundreds of repeated defects per inspection, written by hand and retyped in the evening.
Found in the morning, passed to the subcontractor in the afternoon — hazards stay open longer.
Thousands of photos in chat apps and phones, with no idea which location each one shows.
Forms, photo albums and per-subcontractor instructions are all produced by hand at the office.
Going back for drawings, printing, writing reports — time that creates no value.
Use them separately or together. Same philosophy: only four core features, so anyone can use them after a single training session.
View – Write – Share – Export drawings, documents and site photos right on the iPad.
Record – Manage – Share – Export corrective instructions for every kind of inspection and handover.
Instant instructions during safety patrols, with a dedicated chat for each item to be fixed.
Taken from YSL Solution case studies with Japanese general contractors and subcontractors.
Time needed to issue corrective instructions to subcontractors, thanks to automatic sorting and per-company export.
Cost saved after eliminating printing and manual consolidation: three staff reduced to one.
Effort for measurement work, by digitalising everything from measuring to pass/fail judgement.
Overtime on one project after moving documents and site photos into CheX.
Wall cavities, pit piping and under-floor spaces checked with 360° photos — lower accident risk.
Safety patrols completed with nothing missed, thanks to colour-coded correction status.
The real reason site teams reject IT tools is not that “workers are not good with IT”, but that “the tool has so many features it became complicated”.
Each app has only four core features, designed so many people can share information together.
Around 16,700 sites per month in 17 countries, trusted by Japan’s largest general contractors.
Training sessions for every party involved, operational support and continuous feature updates.
Built on AWS with 256-bit SSL encryption, granular permissions and optional device authentication & IP restriction.
No setup fee. Minimum configuration is 5GB/1 ID for CheX and 1GB/1 ID for LAXSY and AQuick, scalable up or down at any time.
We review your current site practice and decide which work to digitalise first.
A live demo on your own project drawings, with an estimate of effect and cost.
We create the project, set permissions and register drawings and the inspection master for your building type.
Training for site management, supervisors and subcontractors, with support throughout use.
Server fee by storage + ID fee by number of users, shown in VND excluding VAT. Prices are converted from the original price list at the rate of 173 ₫/¥ (updated 08/2026) and may change with the exchange rate; the official quotation is confirmed at contract signing.
| Products | Server fee | Fee per ID / user / month | Notes |
|---|---|---|---|
| CheX | 5GB — 865.000 ₫/month +5GB: 519.000 ₫/month | 519.000 ₫ → 260.000 ₫ lower with more IDs | Options: grid axis 6%, device authentication 5%, IP restriction 5% of the base fee |
| LAXSY | 1GB — 173.000 ₫/month | 1.730.000 ₫ (1–10 IDs) 1.211.000 ₫ (11+ IDs) | One master included; extra master 865.000 ₫/master (up to 10) |
| AQuick | 1GB — 173.000 ₫/month | 104.000 ₫ | Shares the LAXSY server, so both can be rolled out together |
No setup cost · 1 ID = 1 person with unlimited devices · Files converted to the YSL APPS format do not count towards storage.
Enter the number of IDs per product to see an itemised monthly quote in VND.
We will run a live demo on the drawings of your current project and estimate the concrete benefits.
Fill in the form and we will contact you within one business day to arrange an introduction and demo.
YS FLORA LOTUS CO., LTD.
DX Solutions Department
2nd Floor, Tower 1-2, Dolphin Plaza, 28 Tran Binh St., Tu Liem Ward, Hanoi, Vietnam
TEL: 0867 831 368 (Mon – Fri, 8:30–17:30 Vietnam time)
MAIL: dxapps@ysflora.com