This is a tough one, not all devices suit all project needs so there isn’t really a “best buy” device.
We do however recommend that you try to buy something with a later version of Android, 5.0/5.1 Lollipop for example has a huge number of changes under the bonnet, it receives webview engine updates via Google Play to keep up with technology changes (see here for further info).
Devices running Android 6.0, and 7.0, should also have much better performance than those running earlier versions of Android.
We also suggest spending time looking at hardware specifications, not all CPUs are created equal. Compare a quad-core Qualcomm CPU with a RockChip quad-core CPU and the performance difference is huge!
We would always thoroughly recommend testing your chosen solution fully prior to deployment into a live environment.
Customer support service by UserEcho