9. Private Message Box – Android and iPhone
The thing that ruins the overall image for Private Message Box is app’s poor rating on iTunes. Obviously, iPhone users are not satisfied with the app, giving it 1.5 stars. The Android users were more generous awarding the app with 4.2 stars. The use of the app is simple. You choose a contact and from that point on, every new message received from that contact will be stored in the app. The notifications, alerts, and icons are all changeable. You can access the app using the password. It is also the only app available for both Android and iPhone that made it on our list.