Check out the iOS app for Apple smart phones like iPhone 5s, 6s, and 7.
https://itunes.apple.com/sg/developer/anand-software-training-pvt/id1189885869
For A+ Essentials:
https://itunes.apple.com/sg/app/exam-sim-for-a+-essentials/id1204096583?mt=8
For A+ Practical:
https://itunes.apple.com/sg/app/exam-simulator-for-a+-practical/id1204101985?mt=8