UPDATE: Now updated to v2.1 Users with earlier versions should upgrade and retest.
I just published my second benchmark app. This tests memory bandwidth. Get it https://play.google.com/store/apps/details?id=org.codedivine.rgbenchbw
The test is derived from the STREAM benchmark which is widely used in testing memory bandwidth on servers and workstations.
The app is simple (and quick) to run. Just choose the number of threads, press "Run" and within about 10 seconds it will give you memory bandwidth estimate in MB/s. You can try running it with different number of threads. The UI gives you option to run it with 1, 2, 4 or 8 threads.
Results are unfortunately not very consistent from one run to next, but should give you a rough estimate of the memory bandwidth offered by your system. Post your results, or any feedback you may have, here.
On my Snapdragon S3 dual-core system, the achieved peak was 1.8GB/s. This was using 4 or 8 threads.