The app itself is good, but .....

As can be seem the title, you have to consider differentiated things. The app itself is doing what it should. But what a general problem seems to be related apps are Amazon. The continuing review of the license through the App Store, fair enough, but then this system makes please also correspondingly well. Only times the example of this app, when I run the app on the Notifikationsleiste, I get the message prompt the app is not licensed and you should buy it, please. If the app but called from any other part of the system, everything is fine.
The question arises why 4 stars and not 5. Better it is always. I used previously JuiceDefender, this app is not developed any further for some time and therefore no longer works in full on my phone. Whatever the case may, be, the various options in this app surpass the capabilities of DSP Battery Saver. I'd like to see, for example, the function that location oriented the Wifi connection or just activated from leaves.