Do not forget to root your device first with Universal Androot. Barnacle WiFi Tether APK requires __ROOT__ access.
Why using Barnacle WiFi Tether?
Because this app will show you upload and download statistics in real time.
Best WiFi tether app for Froyo to Lollypop devices.
Many positive reviews for this app, like this one:
Barnacle is unlimited, free and open source. If you like it, please donate by getting Barnacle Widget!
See website for FAQ, supported hardware, troubleshooting. Like a charm Verizon, droid x, 3g downloads around 250 kbs at peak. Wifi to multiple home pcs...this thing releases the potential of internet over phone!!!