Does TunnelBear work with tethering?

Yes, but TunnelBear needs to be active on each device that you want to keep encrypted. The technical explanation is that VPN protocols and tethering operate on different network layers.  Even if you have TunnelBear active on your primary device (iPhone/Android), the data from the tethered device will go outside the tunnel and NOT be secured.  

For example: Let's say you have phone and a computer and you want to browse securely on both. You’ll need to put TunnelBear on both the computer and the phone. If you put TunnelBear only on the phone, the data from your tethered computer will not go through the phones tunnel.

We recommend that you install and connect to TunnelBear on each device you want the TunnelBear VPN to protect. You can download the latest version of TunnelBear for any supported device here