No, you can only pair one Everion Device via Bluetooth Low Energy (BLE peripheral) with one mobile device (BLE central) at the same time. Sequentially you can pair as many as you need. The Everion Device has a unique ID which is advertised via BLE.
If you want to connect another mobile device (another iOS or Android mobile device) with your Everion, you have to unpair your Everion from your currently paired mobile device. To unpair your device in the App, please go to How to unpair your Everion and manually delete all data