Predictable Android runs on all devices running at least Android 4.2 and with at least 1.5GB RAM. We’d advise against getting the cheapest tablet you can find which meet these specs though, because the quality of Android devices is variable, and a good quality device will run longer, for better. We like the Samsung range (Predictable Android works great with both the Tab A  and the S2). The sony Z3 and Z4 are also good devices for Predictable Android, and the tablets in the Nexus range are also very good, and can be for a reasonable price.