To develop a react native app (Android and IOS) to read/write mqtt data , decode and display mqtt data from server - Quotation Request

Please provide your estimated total development price in SGD and estimated completion time for the historical software-development scenario below. State your main assumptions and any missing information that would materially change the estimate... (Budget: $400 - $450 SGD, Jobs: Bluetooth Low Energy (BLE), Mobile App Development, MQTT, React Native, WiFi)