OvuView uses the standard in-app purchase feature of Google's Android
Market. You don't have to be afraid of entering your credit card
details, as you enter the card details into Google Checkout (
http://checkout.google.com/ ) and not into OvuView. Buying features in
OvuView's Feature Store is as secure as if you purchase a paid app
from the Android Market. Google wouldn't allow in-app purchases for
Android applications if it were not secure.
For more information about in-app billing please visit this page:
http://developer.android.com/guide/market/billing/index.html
Furthermore, if you are afraid of entering your card details during
the purchase process, you can provide your card details to Google
Checkout through their website (
http://checkout.google.com/ ), which
is Google's similar service as PayPal is.