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From the watt.ma app, you start a charging session by scanning the station’s QR code from the Charge tab. This page describes the full flow and real-time session tracking. Charge screen in the watt.ma app

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Pre-Authentication

Before launching your first session, you must have:
  1. Created an account via the Sign Up screens (name and phone number validation).
  2. Validated your number with the 6-digit OTP received by SMS (auto-advance input).
  3. Set up a payment method in the wallet (see Payment).
In Mock Mode, any 6-digit OTP code is accepted. This is useful for testing the flow without depending on an SMS provider.

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Launch a Session

1

Open the Charge hub

Tap the Charge tab at the bottom of the screen. This is the app’s QR hub.
2

Scan the QR code

The app opens the camera via expo-camera. Point it at the QR code displayed on the station to trigger the session.
3

Confirm and plug in

Verify the pricing and connector shown on screen, confirm, and plug in your vehicle.

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Session Tracking

Once the session is launched, the app displays in real time:
  • The instantaneous power (43 kW by default in Mock Mode)
  • The energy delivered in kWh
  • The elapsed time since the start
  • The cumulative cost in dirhams
Connector commands rely on the OCPP protocol. In Mock Mode, values are simulated and updated every second. Once EXPO_PUBLIC_MOCK_MODE=false, the app sends real commands to the backend via OCPP_BACKEND_URL.

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Stop the Session

Tap Stop in the app to end the session. The final amount is debited from the prepaid wallet and the transaction appears in the history.
Do not unplug the cable before stopping the session in the app. Some vehicles lock the connector while the session is active.