Q - Why my downloaded app is .zip instead of .apk ?
A - Please use some different browser to download the apps. Try to use Google Chrome , Mozilla FireFox etc…
Q - How to Install ?
1. In your device menu, select Settings -> Applications -> Unknown sources (should be activated)
2. With your device, just click on the link and download the apk file, then install.
3. You may also download the file into your computer and use your device’s pc interface to install it (Make sure that you have done #1).
4. Or you may simply download the file into your computer, and then attach it to an email and email it to your phone, or bluetooth it to your phone. Once received in your phone, just click on the file and install it (Make sure that you have done #1).