kindle fire hd 10 came out on october 11, 2017.
when did the kindle fire hd 10 come out?
october 11 , 2017
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while the kindle fire line has always used customized distributions of android, particularly 2.3.3 (api level 10) (kindle fire) and 4.0.3 (api level 15) (fire hd), amazon only began referring to the distribution as fire os beginning with its third iteration of kindle fire tablets, which includes the fire hd 2nd generation and fire hdx models. unlike previous kindle fire models, whose operating system is listed as being "based on" android, the fire hdx "fire os 3.0" operating system is listed as being "compatible with" android; fire os 3 is forked from android 4.2.2, (api level 17). in the fire hd (3rd generation) and fire hdx (2nd generation) tablets, fire os 4 is included that is forked from android 4.4.2 (api level 19). fire os 4.5.1 is based on android 4.4.3. fire os 5.0 is based on android 5.1 (api level 22). fire os 6 is based on android 7.1.2 (api level 25).
fire os