Use of unity for developing a Bill Calculator

I’m new to Unity and looking to create a mobile application similar to the FESCO bill calculator available at
This app would estimate FESCO electricity bills based on user inputs of units consumed.

Could someone also advise me on the requirements for publishing such an application on the Google Play Store?

To build the app you simply need to learn how to code, how to calculate the bills and how to build a UI.

About your worries regarding publishing the app on the Google Play Store there is not really much to do. Google will accept pretty much anything that works (sometimes even if it doesn’t) as long as it’s not a virus.

Here you can see a simple tutorial about how to publish a game on Google Play Store: