Every vibration analyst needs Mobius iVibe. It is like an interactive wall chart on your Android device.
You can search for diagnostic information based on component type (motors, bearings, etc.), symptoms (harmonics, sidebands, etc.), and fault conditions (unbalance, misalignment, etc.).
It is extremely easy to use and you can use it to diagnose faults. Once you drill down through the menus you can flick the spectra up and down to see similar spectra, or flick them left and right to reveal additional information and tests that will help you determine the nature of the fault.
The product comes in different resolutions based on the capability of your device.
Seriously, if you are a vibration analyst or have any interest in vibration analysis you need this product.