FilterBook is a CRM and service management platform built for RO water purifier sales and service businesses. It replaces paper registers and spreadsheets with automatic service scheduling, WhatsApp PDF invoices, QR-code complaint registration, AMC contract tracking with audit logs, and a shareable digital product catalogue across Android, iOS, and Web.
Every engineering milestone tied directly to verifiable application speed, scalability, and bottom-line revenue impact.
Explore the production-deployed UI engineered for effortless customer booking, responsive multi-device adaptability, and streamlined operational control.
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How we deconstructed technical debt, eliminated bottlenecks, and delivered an uncompromising system.
Water purifier businesses depend on long relationships after the sale—filter replacements, periodic maintenance visits, Annual Maintenance Contract (AMC) renewals, and rapid complaint resolution. Most shop owners managed hundreds of customers in paper diaries or disconnected Excel sheets, leading to missed recurring service dates, lost AMC renewal revenue once contracts expired, slow phone-based complaint handling, tedious manual invoice writing, and no simple way to share a digital product catalogue with prospective buyers or view orders, services, and complaints in one unified dashboard.
Vision engineered FilterBook, a 4-tier multi-tenant SaaS ecosystem comprising a React Native (Expo) mobile app for Android and iOS, a Vendor Web Admin Panel, a Super Admin Console, and zero-login Public QR Web Pages. When an order is saved, FilterBook automatically generates the customer's full recurring maintenance schedule, renders an itemized A4 PDF invoice with upcoming service dates via TCPDF, and delivers it directly to the customer's WhatsApp via the Meta WhatsApp Cloud API. Customers register complaints in under a minute by scanning a QR code on their purifier, triggering instant push notifications to the shop owner's phone.
A high-cohesion, low-coupling module hierarchy engineered to power seamless customer reservations and enterprise fleet management.
Live operational command center tracking monthly and lifetime business KPIs alongside automated daily push reminders.
One-step order entry that simultaneously builds the maintenance calendar and dispatches a branded invoice on WhatsApp.
End-to-end lifecycle tracking for routine filter maintenance visits and Annual Maintenance Contracts with full audit history.
Frictionless QR-based support workflow allowing customers to report purifier issues in seconds without installing an app.
Integrated stock control paired with a public-facing digital storefront shareable via a single QR code.
Platform-level governance console with stateless JWT security, SMS OTP authentication, and remote session control.
Core software components transferred to the client with full IP ownership.
Designed for high concurrency, automated testing coverage, and zero downtime.
Designed for high concurrency, automated testing coverage, and zero downtime.
Designed for high concurrency, automated testing coverage, and zero downtime.
Designed for high concurrency, automated testing coverage, and zero downtime.
Designed for high concurrency, automated testing coverage, and zero downtime.
Designed for high concurrency, automated testing coverage, and zero downtime.
Designed for high concurrency, automated testing coverage, and zero downtime.
Designed for high concurrency, automated testing coverage, and zero downtime.
“FilterBook replaced all our paper registers. Now whenever we sell an RO purifier, the customer immediately gets a PDF bill with their service dates on WhatsApp, our team gets daily reminders for filter changes, and customers just scan our QR code to log a complaint.”
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