I can test your app on the following devices.
Samsung Galaxy (Grand , Duos)
Amoi N828 ( Quad-core mediatek)
Samsung S Duos
Sony Xperia Pro etc
I have access to a large number of Android devices in the tab, phone, phablet ranges. I also am a graduate in computer science and can understand your instructions as to how to go about testing your device.
I shall intensely use your app for two days(or a shorter period if you wish) and provide you with my impressions and any issues I encounter.
I can send you screenshots, data files and any other background detail that we might agree upon.