Predictable is great for older users; people who are reasonably confident spellers, who have a medium or large vocabulary and would be frustrated by the limitations of a grid or scene communication system.
If you already have an android tablet and don’t want to buy a whole new device for communication, this may be an ideal solution. Other benefits to Android include a much greater control over the exact type of device to purchase -- plenty of different sizes, features and price points; and external storage so you can always give yourself a storage upgrade as you find yourself using more of the tablet.
Predictable Android won the Ericsson App of the year in 2013, and is packed with features to make it feel more personal and easier to use. More information can be found on the Predictable for Android page of the Therapy Box website.