Hi
Can anyone tell me if the app is available on Google Playstore please or is it only on iStore?
If you mean the receipt app, it’s only available on apple devices.
If you’re after an Android alternative, you can download Cam Scanner which does a good job 
Here’s the CamScanner overview. I use this myself as I have an Android device and it works really well!
Camscanner is great, but I have stopped using it lately because I have Evernote. I create a photo note in Evernote and then send by email to receipts@quickfile.co.uk. As I want the receipt in Evernote as well it is very efficient