SmartWash is a coin-laundry DX platform that connects directly via IoT to commercial washers from a major domestic manufacturer, delivering real-time availability visualization, QR cashless start, and member points integration end-to-end.
"Store experience, cashless, IoT machine integration, multi-store operations" — Industry scale: 26,000+ stores a platform meeting all four axes required by this lifestyle-infrastructure business simultaneously, from scratch 8 months , a new-platform launch story built in-house.
The smart-laundry operating company is an industry-leading operator running coin-laundry stores nationwide.Over 26,000 stores nationwide — in a coin-laundry market described as such, they keep growing on the twin engines of efficient unattended operations and better customer experience.
The business model is "Unattended × multi-store". The labor burden of change management, cash collection, and fault response, plus the customer-experience problem of not knowing availability before arriving — these two structural challenges had to be solved simultaneously with mobile and IoT.
None of these are technology-selection problems;Visit drivers · operating cost · machine uptime · multi-store control — business requirements tied directly to this. A greenfield build had to "make them hold true simultaneously" by design.
Without knowing availability before arriving, when full, 20% drop-off rate arises, capping machine utilization at a structural ceiling. Without real-time visualization, the decline in visit motivation cannot be stopped.
Running change management and cash collection on cash,8 hrs/month per store labor is incurred permanently. The more stores you open, the more the headquarters' operating cost swells linearly and scaling slows.
Without a way to remotely track machine activity and errors at unattended stores, faults go unnoticed until a customer reports them, Mean recovery over 4 hrs is incurred. Complaints and lost opportunities become routine.
If machines, transactions, members, points, and campaigns are siloed per store, cross-cutting decisions lag until the monthly close. Without designing for multi-store from the outset, store-opening speed and Repeat rate 35% balancing improvement breaks down.
We built all four domains — customer touchpoints, payment experience, IoT machine integration, and the operations platform — from scratch in-house, aligned to the structure of the business. Cloud infrastructure, the mobile app, and always-on connectivity to manufacturer machines were designed end-to-end together with Amela.
Coin laundry is a business where "you can't tell if a machine is free until you go" — the industry needed a mechanism to eliminate wasted trips when everything is full.
Shows the map + machine status before arriving. Frees the visit decision from "depending on being on-site."
Continuing change management and cash collection in a cash-based business meant operating costs would grow linearly with every new store — a structure that had to be dismantled.
Three providers equivalent to PayPay / Rakuten Pay / d Pay are absorbed on the platform side. Near-zero cash handling achieved.
Without remote visibility into machine activity and faults, average recovery took over 4 hours — we needed to build a new platform bridging the industry-standard protocol and the app.
washer-gateway syncs activity, billing, and errors in milliseconds over an always-on TCP connection. The app reflects it with no delay.
We needed a mechanism to integrate multiple stores, machines, and campaigns across the board — designed for multi-store from the start rather than bolted on later.
Daily decisions from a real-time KPI dashboard across all stores. A platform that lets store-opening speed grow with scale.
React Native
E Expo
Next.js
Tailwind CSS
Radix / shadcn
TanStack Query
NestJS
T TypeORM
Socket.io
Redis + Bull
JWT Auth
AWS
S3
⚡ TCP memory-link Gateway
P Expo Push
AWS SES
This foundation is not a technical metric,Creating visit motivation, cutting operating costs, minimizing machine downtime, data-driven management — these business outcomes are generated continuously in the day-to-day of store operations.
Availability can always be checked in the app, structurally eliminating wasted return trips when everything is full.
With cashless by default, change management and cash collection all but disappear, so headquarters' burden doesn't grow as store count rises.
washer-gateway detects faults instantly and notifies. On-site dispatch can be directed at the optimal time, curbing complaints.
Real-time KPIs across all stores instantly visualize P&L and campaign impact. Designed to maximize the speed of store-opening decisions.
Only knowing availability on arrival; cash is a must
Check availability in the app before arriving, then complete everything with QR start + cashless
Points integration and "zero wait time" UX drive repeat visits
8 hrs/month per store on change refills and cash collection; can't stop losing customers when full
Cashless payment ratio 90%+; availability visualization curbs drop-off
Cash-handling cost cuts and fewer lost opportunities at once
Faults at unattended stores go unnoticed until a customer reports them; recovery over 4 hours
washer-gateway notifies faults instantly, directing on-site dispatch at the optimal time
Fewer complaints and minimized machine downtime
Per-store P&L and campaign impact can't be seen until month-end close
Real-time KPI dashboard across all stores for daily decisions
Gained a foundation for data-driven multi-store expansion