Amazon FireTV Stick is 32-bit or 64-bit

Amazon FireTV Stick is 32-bit or 64-bit

Which Android Version of kodi 17.6 krypton to download for Firestick

1) 
ARMv7a(32bit) or

2)
ARMv8a(64bit) 

All Fire TV Sticks (1st & 2nd gen) are 32-bit

Fire TV Box (1st gen) is 32-bit
Fire TV Box (2nd gen) is 64-bit

Note: INSTALL of a
 64-bit APK file just returns "X" App not installed.Good to select ARMv7a(32bit)