APK stands for Android Package (APK) file. It’s the file format used to distribute and install application software onto Google’s Android operating system. When you buy an application in the Google Play store this is the file that gets downloaded and installed on your device for the application. When a developer places his product’s APK in the Google store the files are encrypted and protected with a special key which prevents the file from distributed outside of the Google store. This protection feature is called DRM or digital rights management.
The reason an APK file is protected is to prevent it being given away without paying for it. If APKs were not protected anyone could download the APK and give to a friend, or even sell it. Companies in business to sell an application and make a profit never want to see their APKs available outside the Google store.
Therefore the answer to your question is no, we will not provide a copy of our APK file. In fact reverse engineering an APK to remove the protection feature is a violation of Digital Millennium Copyright Act (DMCA). DCMA is a United States copyright law that criminalizes production and dissemination of technology, devices, or services intended to circumvent measures (commonly known as digital rights management or DRM) that control access to copyrighted works. It also criminalizes the act of circumventing an access control, whether or not there is actual infringement of copyright itself.