As there any such Android App?

With the help of play store, you can get easily this type of app.

There is a large untapped demand for an android app that will identify original and fake currency notes

Just search on google play store.

Just Google it or search in Google play store. That's simple

app that will identify original and fake currency notes

There are many business, those have their apps. What kind of apps do you looking for?

Why no one is giving names of apps? Is it a standard practice at apsense just to answer for the sake of earning credits for answering?

There are many apps in the internet

There are many types of apps in internet you can use exact keywords to find

Petr Antonovskiy is absolutely right,There are a lot of apps on the internet.
Go and You just use searchers to find them...

many app please type a correct keyword for your work

Hello Jossy,

Can you provide the link to register with RBI?

There are many apps on the internet! You just use searchers to find them...

UV rays are used for detect fake or forged currency notes. In Google play store, Search for "indian fake currency detector". There are lot of apps, you should try for which one is right fro you.
OR
RBI is best for you. Create account and register with exact details. Click a pic of fake currency note and submit to their database and later they'll reply you for better solution via Calls/Email reply.
Thanks

There are a lot of apps in internet! You should use searchers to find them..