@IshuB04 said:
Question about Developer vs Commercial use
I made an application that is published on the Play Store.
I haven't put any ads in the application yet,
but if I put ads will it be considered as commercial use of the API?

When I created my API Key I chose between these options:

Developer

• You are an individual
• Your project is still in development
• Your project is non profit
• Your project is ad supported

Professional

• You represent a company
• Your project is for profit (not ad supported)
• You are an OEM or hardware vendor

I believe your case fits Your project is ad supported.
So just follow the rules for informing the data source.
https://www.themoviedb.org/about/logos-attribution

I believe your case fits Your project is ad supported.

Oh Okay. Thanks