Hello,
Firstly, I have to say I'm very happy to get a chance to apply to a project such as this one.
My proposal would be to create an iOS and Android app utilising the Flutter framework so one code base can be shared across both of the platforms, and could possibly even be extended further from those, all according to your requirements.
The work can be started immediately for the budget of 7000 INR, and can be finished in 2 - 3 days.
You can check out some of my work by accessing my portfolio at [login to view URL], and should you require any follow-up, please feel free to send me a message.