How do I download app's APK file from Market to my desktop computer? Possible Duplicate:
  How can I download an APK file from the Play Store?  




Is there any working tool I could use to download app's APK file from Market to my desktop computer?

I know there was a Chrome extension but it no longer works.
As far as I know, it is against terms and conditions to do so.  But if you would still like to do so, a work around is to use an emulator and connect to market.  This site explains how it can be done.

Once such emulator is working you can use applications like app extractor to extract the APK to emulator's file system (sd card). Then you can use adb pull command to take it out.