What are the minimum technical requirements of the devices needed to play with the robot?

The first and most important condition is to have a mobile device with a minimum Bluetooth 4.0 Low Energy chip and 1GB RAM memory. We are aware of devices (about 0.5% of devices on the market) that seemingly meet those requirements but do not communicate with the Photon Robot properly (these devices are from low cost brands with low quality components installed). We have not observed any issues with the well-known and established brands widely available on the market.