There is none. Plus even if there was, apple would not allow it in there appstore.
In short, you are kind of dependent on apple for security. Luckily, security on apple devices is not hard. Same with Android. Pay attention to reviews on apps before you download, as well as having a pin on your device.
With android, you get the added benefit of the app listing what it is able to access on your phone by way of permissions. Sadly IDevices do not have this feature.