This app is wonderful and works with kindle fire great. Although kindle does not have gps, you can set your coordinates (go to settings after you install the app then go to advanced settings). To get you exact coordinates and make sure the prayer times are accurate, go to [...] and install their free Nathan software. when you open it, you coordinates will be listed at the top right of the program window. Input the coordinates in the advanced settings in Muslim prayer rug app and then set your prayer schedule preference (under the main app settings for "isna" if you are in the us). This should get your prayer times to within a minute or so of those listed on Islamic finder insha-Allah.
What I really lobe about this app is...
1. easy to install
2. looks nice
3. variety of athan voices to choose from
4. live webcam of makkah!!!!
Great app, I love it masha-Allah.