4blend has in app purchase options...
Key features on paid package:
? Apply filter even after taking the shot
? Open and modify photos from gallery
? Detect automatically the hdr sequence of shots taken at different exposure while opening a from gallery, for a better results
? Select 16:9 or 4:3 ratio mode
? Set flash light
If you selected these additional add-ons you get charged.
The app should have asked you from which account you wanted to pay.