Does what it is supposed, easy to use and free - but not quite perfectly

I've been more than 4 months, the app now in use, according to the by Android / Samsung update my Samsung Galaxy S4 said suddenly, after a few hours. The battery
On the advice of a colleague So just install this free app. Contrary to some reviews I can buy - and ensuring the stability / usability only at purchase - not comprehend. As a free app but you have to "accept" that a (discreet) banners and partly (direct) advertisements are displayed.

After a short period the app already showed first successes. The simple operating concept like - start, click Diagnostic button, wait a few seconds, or deselect to closing apps and you're done. If desired, you can put apps on whitelists, which are then ignored by BD.

The BD like displays after exiting "unnecessary" apps, how much battery life you "won" has - from the value but you should not be impressed, interpret it rather as a guide - so much coming times, an increase of 3 hours out. (depending on the amount of closed apps) and when the battery indicator then drops by 1 percentage point, are * plop * suddenly 4 hours battery life again "consumed".

Conclusion: The request was to increase the battery life - this is the app more than justice - otherwise I had every evening (occasionally even the afternoon) recharge my smartphone now holds again at least 2 days by.. And now time for free.

Only negative point is true that since about version 4.1.1 of the BD in the diagnosis of "GPS" (which permanently out with me) or "Apps" happy times "remains" - only if BD repeatedly quit and restart , the diagnosis is then terminated successfully. This costs the app one star.

Surroundings: Samsung Galaxy S4, Android 4.4.2, Battery Doctor 4.1.4

Summary:

+ Easy operation
+ Configuration option to exclude from the Exit, among others Apps, whitelists
+ Only discreet little banner ads that are just click away
+ Low own consumption
+ Low memory requirements

- Calculations for "recovered" battery life is unrealistic
- Projected battery life more than realistic guideline
- "Trailer" at the diagnosis point "GPS" and "Apps"
- Often advertisements