Seems To Create More Problems Than It Resolves On My Kindle Fire HD,
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This review is from: GreenPower Premium Battery Saver (App)
Having run this app for several days on two separate Kindle Fire HDs, in an attempt to maximize battery efficiency, both devices were beset with similar problems, within only a few days of installation.
When initiating the Kindles, the screens were both completely frozen and a reboot (not a complete factory reset) was the only means of enabling them to operate. Prior to this, I had also noticed that the batteries had drained far faster than usual.
Once the app had been removed, the problems were eliminated.
Consequently, I could not recommend this app for use with the Kindle Fire HD, although I do not have any experience of having used it on other devices, so perhaps it may well work more appropriately in other contexts.
As this was a free app at the time of purchase, I cannot complain about the price, but would suggest that those considering paying for the app check out its level of efficiency, with those who have used it, in relation to their particular device.