Assuming you are referring to the security of the wallet; I can mention the following:

- It is open source ( https://github.com/Cybnate/NuDroid)
- It is based on the Bitcoin wallet ( https://play.google.com/store/apps/details?id=de.schildbach.wallet)
- We have two trusted blockchain servers which the App defaults to and if you wish you can run your own providing the best security
- Your keys always stay on your mobile device and in your control.
- (edit) The app can be set to require a pincode for every outgoing transaction

Will try to get some users to reply as my view is biased