<P> The Fire HD 6" and 7" third generation uses Fire OS 4 "Sangria", which features profiles so each user on the tablet can have their own settings and apps . </P> <P> The Fire HD 8 and 10 fifth generation uses Fire OS 5 "Bellini" and was released in late 2015 . In September 2016, Amazon released virtual assistant Alexa for the sixth generation Fire tablets . </P> <Table> <Tr> <Th_colspan="3"> Generation (within Fire tablets) </Th> <Th_colspan="1"> 2nd generation (2012) </Th> <Th> 2.5 th generation (2012) </Th> <Th> 3rd generation (2013) </Th> <Th> 4th generation (2014) </Th> <Th> 5th generation (2015) </Th> <Th> 6th generation (2016) </Th> <Th_colspan="2"> 7th generation (2017) </Th> </Tr> <Tr> <Th_colspan="3"> Model </Th> <Th> Kindle Fire HD 7" </Th> <Th> Kindle Fire HD 8.9" </Th> <Th> Kindle Fire HD </Th> <Th> Fire HD 6 and 7 </Th> <Th> Fire HD 8 and 10 </Th> <Th_colspan="2"> Fire HD 8 </Th> <Th> Fire HD 10 </Th> </Tr> <Tr> <Th_colspan="3"> Release date </Th> <Td> September 14, 2012 </Td> <Td> November 20, 2012 </Td> <Td> October 2, 2013 </Td> <Td> October 2, 2014 </Td> <Td> September 30, 2015 </Td> <Td> September 21, 2016 </Td> <Td> June 7, 2017 </Td> <Td> October 11, 2017 </Td> </Tr> <Tr> <Th_colspan="3"> Status </Th> <Td_colspan="3"> Discontinued </Td> <Td_colspan="1"> 6" Available 7" Discontinued </Td> <Td> 8" Discontinued 10.1" Available </Td> <Td> Available </Td> <Td> Current </Td> <Td> Current </Td> </Tr> <Tr> <Th_colspan="3"> OS </Th> <Td_colspan="2"> Based on Android 4.0. 3 </Td> <Td> Fire OS 4 </Td> <Td_colspan="5"> Fire OS 5 </Td> </Tr> <Tr> <Th_colspan="3"> System Version </Th> <Td> 7.5. 1 </Td> <Td> 8.5. 1 </Td> <Td> 4.5. 5.3 </Td> <Td_colspan="4"> 5.6. 0.0 </Td> <Td> 5.6. 0.0 (With Hands - Free Alexa) </Td> </Tr> <Tr> <Th> Screen </Th> <Th_colspan="2"> Size (diagonal) </Th> <Td> 7 in (18 cm) </Td> <Td> 8.9 in (23 cm) </Td> <Td> 7 in (18 cm) </Td> <Td> HD 6: 6 in (15 cm) HD 7: 7 in (18 cm) </Td> <Td> HD 8: 8 in (20 cm) HD 10: 10 in (25 cm) </Td> <Td_colspan="2"> 8 in (20 cm) </Td> <Td> 10.1 in (26 cm) </Td> </Tr> <Tr> <Th_colspan="2"> Resolution </Th> <Td> 1280 × 800 </Td> <Td> 1920 × 1200 </Td> <Td_colspan="5"> 1280 × 800 </Td> <Td> 1920 x 1200 </Td> </Tr> <Tr> <Th_colspan="2"> Density </Th> <Td> 216 ppi </Td> <Td> 254 ppi </Td> <Td> 216 ppi </Td> <Td> HD 6: 252 ppi HD 7: 216 ppi </Td> <Td> HD 8: 189 ppi HD 10: 149 ppi </Td> <Td_colspan="2"> 189 ppi </Td> <Td> 224 ppi </Td> </Tr> <Tr> <Th_colspan="1"> CPU </Th> <Th_colspan="2"> Maker </Th> <Td_colspan="3"> Texas Instruments </Td> <Td_colspan="5"> MediaTek </Td> </Tr> <Tr> <Th_colspan="2"> Kind </Th> <Td_colspan="3"> Dual - core OMAP 4 </Td> <Td_colspan="2"> Quad - core ARM big. LITTLE </Td> <Td_colspan="3"> Quad - core </Td> </Tr> <Tr> <Th_colspan="2"> Model </Th> <Td> 4460 HS </Td> <Td_colspan="2"> 4470 HS </Td> <Td_colspan="2"> MT8135V </Td> <Td_colspan="2"> MT8163V / B </Td> <Td> MT8173 </Td> </Tr> <Tr> <Th_colspan="2"> Cores </Th> <Td> 2x ARM Cortex - A9 @ 1.2 GHz </Td> <Td_colspan="2"> 2x ARM Cortex - A9 @ 1.5 GHz </Td> <Td_colspan="2"> 2x ARM Cortex - A15 @ 1.5 GHz 2x ARM Cortex - A7 @ 1.2 GHz </Td> <Td_colspan="2"> 4x ARM Cortex - A53 @ 1.3 GHz </Td> <Td> 2x ARM Cortex - A72 @ 1.8 GHz 2x ARM Cortex - A53 @ 1.4 GHz </Td> </Tr> <Tr> <Th_colspan="2"> Width </Th> <Td_colspan="5"> 32 - bit </Td> <Td_colspan="3"> 64 - bit </Td> </Tr> <Tr> <Th_colspan="1"> GPU </Th> <Th_colspan="2"> Designer </Th> <Td_colspan="5"> Imagination Technologies </Td> <Td_colspan="2"> ARM Holdings </Td> <Td> Imagination Technologies </Td> </Tr> <Tr> <Th_colspan="2"> Kind </Th> <Td_colspan="5"> PowerVR </Td> <Td_colspan="2"> Mali </Td> <Td> PowerVR </Td> </Tr> <Tr> <Th_colspan="2"> Model </Th> <Td> SGX540 </Td> <Td_colspan="2"> SGX544 </Td> <Td_colspan="2"> G6200 </Td> <Td_colspan="2"> T720 MP2 </Td> <Td> GX6250 </Td> </Tr> <Tr> <Th_colspan="2"> Clock </Th> <Td_colspan="3"> 384 MHz </Td> <Td_colspan="2"> 450 MHz </Td> <Td> 650 MHz </Td> <Td>? </Td> <Td> </Td> </Tr> <Tr> <Th_colspan="3"> RAM </Th> <Td_colspan="5"> 1 GiB </Td> <Td_colspan="2"> 1.5 GiB </Td> <Td> 2 GiB </Td> </Tr> <Tr> <Th> Storage </Th> <Th> Internal </Th> <Th> Wi - Fi </Th> <Td_colspan="2"> 16 GB or 32 GB </Td> <Td_colspan="2"> 8 GB or 16 GB </Td> <Td> HD 8: 8--16 GB HD 10: 16--64 GB </Td> <Td_colspan="2"> 16 GB or 32 GB </Td> <Td> 32 GB or 64 GB </Td> </Tr> <Tr> <Th> + Cellular </Th> <Td> N / A </Td> <Td> 32 GB or 64 GB </Td> <Td_colspan="6"> N / A </Td> </Tr> <Tr> <Th_colspan="2"> External </Th> <Td_colspan="4"> N / A </Td> <Td> at least up to 128 GB microSDXC </Td> <Td> at least up to 200 GB microSDXC </Td> <Td> at least up to 256 GB microSDXC </Td> <Td> at least up to 256 GB microSDXC </Td> </Tr> <Tr> <Th_colspan="1"> Camera </Th> <Th_colspan="2"> Back </Th> <Td_colspan="3"> N / A </Td> <Td> 2 MP </Td> <Td> 5 MP </Td> <Td_colspan="3"> 2MP </Td> </Tr> <Tr> <Th_colspan="2"> Front </Th> <Td_colspan="2"> 1.3 MP HD 720p </Td> <Td> N / A </Td> <Td> 0.3 MP </Td> <Td> 1.3 MP HD 720p </Td> <Td_colspan="3"> 0.3 MP </Td> </Tr> <Tr> <Th_colspan="3"> Microphone </Th> <Td_colspan="2"> Yes </Td> <Td_colspan="5"> Yes </Td> </Tr> <Tr> <Th_colspan="3"> HDMI </Th> <Td_colspan="2"> microHDMI </Td> <Td> N / A </Td> <Td> Amazon HDMI Adapter </Td> <Td_colspan="4"> N / A </Td> </Tr> <Tr> <Th_colspan="3"> Bluetooth </Th> <Td_colspan="2"> Bluetooth 3.0 + EDR (HID and A2DP profiles only) </Td> <Td> Bluetooth 4.0 + EDR (HID and A2DP profiles only) </Td> <Td_colspan="2"> Bluetooth 4.0 LE </Td> <Td_colspan="3"> Bluetooth 4.1 LE </Td> </Tr> <Tr> <Th_colspan="2"> Wireless </Th> <Th> Wi - Fi </Th> <Td_colspan="3"> Dual - band 802.11 a / b / g / n </Td> <Td> Single - band 802.11 b / g / n </Td> <Td> Dual - band 802.11 a / b / g / n / ac </Td> <Td_colspan="2"> Dual - band 802.11 a / b / g / n </Td> <Td> Dual - band a / b / g / n / ac </Td> </Tr> <Tr> <Th> + Cellular </Th> <Td> N / A </Td> <Td> adds 4G LTE </Td> <Td_colspan="6"> N / A </Td> </Tr> <Tr> <Th_colspan="2"> Location </Th> <Th> Wi - Fi </Th> <Td_colspan="8"> Wi - Fi based </Td> </Tr> <Tr> <Th> + Cellular </Th> <Td> N / A </Td> <Td> adds GPS and aGPS </Td> <Td_colspan="6"> N / A </Td> </Tr> <Tr> <Th_colspan="2"> Proximity </Th> <Th> Wi - Fi </Th> <Td_colspan="1"> N / A </Td> </Tr> <Tr> <Th> + Cellular </Th> <Td> Yes </Td> </Tr> <Tr> <Th_colspan="2"> Compass </Th> <Th> Wi - Fi </Th> <Td_colspan="1"> N / A </Td> </Tr> <Tr> <Th> + Cellular </Th> <Td> Yes </Td> </Tr> <Tr> <Th_colspan="3"> Light sensor </Th> <Td_colspan="2"> Yes </Td> <Td_colspan="3"> N / A </Td> <Td_colspan="3"> Yes </Td> </Tr> <Tr> <Th_colspan="3"> Accelerometer </Th> <Td_colspan="8"> Yes </Td> </Tr> <Tr> <Th_colspan="3"> Gyroscope </Th> <Td_colspan="6"> Yes </Td> <Td_colspan="2"> N / A </Td> </Tr> <Tr> <Th_colspan="3"> Barometer </Th> <Td_colspan="8"> N / A </Td> </Tr> <Tr> <Th_colspan="2"> Weight </Th> <Th> Wi - Fi </Th> <Td> 395 g (13.9 oz) </Td> <Td> 545 g (19.2 oz) </Td> <Td> 345 g (12.2 oz) </Td> <Td> HD 6: 290 g (10 oz) HD 7: 337 g (11.9 oz) </Td> <Td> HD 8: 311 g (11.0 oz) HD 10: 432 g (15.2 oz) </Td> <Td> 341 g (12.0 oz) </Td> <Td> 369 g (13.0 oz) </Td> <Td> 500 g (17.7 oz) </Td> </Tr> <Tr> <Th> + Cellular </Th> <Td> N / A </Td> <Td> 567 g (20.0 oz) </Td> <Td_colspan="6"> N / A </Td> </Tr> <Tr> <Th_colspan="3"> </Th> <Td> 193 mm × 137 mm × 10.3 mm (7.60 in × 5.39 in × 0.41 in) </Td> <Td> 240 mm × 160 mm × 8.8 mm (9.45 in × 6.30 in × 0.35 in) </Td> <Td> 191 mm × 128 mm × 10.6 mm (7.52 in × 5.04 in × 0.42 in) </Td> <Td> HD 6: 160 mm × 103 mm × 10.7 mm (6.30 in × 4.06 in × 0.42 in) HD 7: 191 mm × 128 mm × 10.6 mm (7.52 in × 5.04 in × 0.42 in) </Td> <Td> HD 8: 214 mm × 128 mm × 7.7 mm (8.43 in × 5.04 in × 0.30 in) HD 10: 262 mm × 159 mm × 7.7 mm (10.31 in × 6.26 in × 0.30 in) </Td> <Td> 214 mm × 128 mm × 9.2 mm (8.43 in × 5.04 in × 0.36 in) </Td> <Td> 214 mm × 128 mm × 9.7 mm (8.43 in × 5.04 in × 0.38 in) </Td> <Td> 262 mm x 159 mm x 9.8 mm (10.3 in x 6.3 in x 0.4 in) </Td> </Tr> <Tr> <Th_colspan="3"> Battery </Th> <Td> 4400 mAh </Td> <Td> 6000 mAh </Td> <Td> 4400 mAh </Td> <Td> 8.5 hours </Td> <Td> 3830mAh / 8 hours </Td> <Td_colspan="2"> 4750 mAh / 12 hours </Td> <Td> 10 hours </Td> </Tr> </Table> <Tr> <Th_colspan="3"> Generation (within Fire tablets) </Th> <Th_colspan="1"> 2nd generation (2012) </Th> <Th> 2.5 th generation (2012) </Th> <Th> 3rd generation (2013) </Th> <Th> 4th generation (2014) </Th> <Th> 5th generation (2015) </Th> <Th> 6th generation (2016) </Th> <Th_colspan="2"> 7th generation (2017) </Th> </Tr>

When did the kindle fire hd 10 come out