Do not purchase

My best friend bought the app and it works fine for her, but anytime I want to log in it says

"{"code": 403, "error_type": "OAuthForbiddenException", "error_message": "You are not a sandbox user of this client"}"

I know this app has potential when its fixed but as of now its not getting a good rating from me and is getting a very upset "user" ( cant even really use it ) who payed money for a waste of software.

Ruthie woods about Followers + EA - Analytics for Instagram, v1.9.8