Contact person: Smart Rental Water Purifier App

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Location: Hyderabad, India

Budget: Recommended by industry experts

Time to start: As soon as possible

Project description:
"I’m building a subscription-based water-purifier service and need a single mobile app that works on both Android and iOS. The purifier’s on-board motherboard already tracks total litres dispensed and the current calendar month; once either limit is hit, the machine cuts off the flow. The app’s job is to tap into that data, keep users informed, and make re-activation effortless.

Core workflow
• A user signs up with email and password, pairs the phone to the purifier (Bluetooth or Wi-Fi module is already in place), and sees real-time statistics: litres remaining, days remaining, and cumulative usage history.
• When the limit is reached, the firmware triggers an autostop; at the same moment the app should push a notification and show a “Recharge” button.
• The purifier’s front panel has a printed QR code. Scanning it must open the same recharge screen inside the app, pre-filled with the device ID, so the customer just confirms payment and the motherboard receives an “unlock” command instantly.

Deliverables
1. Universal Flutter/React Native codebase (open to either) compiled for Android & iOS.
2. Secure email/password authentication plus simple device pairing flow.
3. REST/Socket interface that talks to the purifier’s existing firmware to pull usage metrics and send unlock commands.
4. QR-code deep link that jumps straight into the in-app payment screen, triggers payment (Stripe/UPI), and on success re-enables the purifier automatically.
5. Source code, build instructions, and a brief hand-off session to walk me through app store deployment.

If something in the hardware API needs clarification, I can supply the protocol docs. I’m expecting clean, well-commented code and a short test plan showing litres-limit autostop, monthly autostop, and successful recharge." (client-provided description)