Excellent bandwith test tool iperf is THE bandwith test tool there is and now there is a good android version. Very nice! Got 60Mbit on a SGS3 over 5.0Ghz. Client works, Server works, duplex test works, setting time duration works. Tested on Galaxy S2 and S3 and on a Asus Transformer all working. Only issue I encountered was a screen update issue that sometimes some text would fail to appear. Further then that, perfect.

Great app, but please add an option to block cellular data Used this to test wifi transfer rates. Works just as expected. Needs an option to prevent the app from transmitting on cellular data though as in just a few minutes it had used up 500MB (1/4 of my monthly data plan) as it continued transmitting after wifi dropped.

Help or Options button Will be great if you add easy accesible help or options button. Pre-defined commands or macros or something like last used iperf server will be usefull too. I'm boring ecery time entering simmilar information for quick speed test specialy on the field

Great port to Android!! Works well on my Samsung Galaxy Nexus running ICS. It tops out at ~20Mbps. Could be limitation of my wifi router because a laptop does the same. Only complaint is that when testing with -r option the second test stops after just 2 seconds. I've seen this happen on PCs as well, so no strikes against this app.

No issues Does exactly what you'd expect it to do. My only complaint is that there's nowhere that mentions it's iperf2 (not iperf3); not difficult to figure out though.

V.good I use iperf a lot, so this was a nice find. Doesn't seem to play well with iPerf3 on my Linux box at home, but works really well with iperf-2.0.5, which is what i have installed on most of my servers anyway.