<P> The first - generation Kindle Fire has a sensor on the upper left - hand corner of the screen . This was widely considered to be an ambient - light sensor, disabled since an early software upgrade . </P> <P> Color display technologies consume much more power than monochrome electronic paper (E-ink) types; Fire offer a typical battery life of 8 hours of mixed usage, while monochrome Kindles offer 15 to 30 hours' use without WiFi--"battery lasts weeks on a single charge"--with a much lower - capacity battery . </P> <P> The first generation of Kindle Fire devices run a customized Android 2.3. 3 Gingerbread OS . The second - generation Kindle Fire HD runs a customized Android 4.0. 3 Ice Cream Sandwich OS . Along with access to Amazon Appstore, the Fire includes a cloud - accelerated "split browser", Amazon Silk, using Amazon EC2 for off - device cloud computation; including webpage layout and rendering, and Google's SPDY protocol for faster webpage content transmission . The user's Amazon digital content is given free storage in Amazon Cloud's web - storage platform, 5 GB music storage in Amazon Cloud Drive, and a built - in email application allows webmail (Gmail, Yahoo!, Hotmail, AOL Mail, etc .) to be merged into one inbox . The subscription - based Amazon Prime, which includes unlimited streaming of movies and TV shows, is available with a free 30 - day trial period . </P> <P> Content formats supported by the first - generation Kindle Fire were Kindle Format 8 (KF8), Kindle Mobi (. azw), TXT, PDF, unrestricted MOBI, PRC natively, Audible (Audible Enhanced (AA, AAX)), DOC, DOCX, JPEG, GIF, PNG, BMP, non-DRM AAC, MP3, MIDI, OGG, WAV, MP4, VP8 . </P>

Is kindle fire the same as amazon fire