Ive had this app for a couple years now, going from my iPhone 5 to a 6, and continue to be pleased with its capability. It gives me great information about my battery charge, translating it to hours it can perform tasks such as GPS routing, web surfing, reading, calling, even flash light use. So when it tells me that Im low in battery, I can still see that I have enough power to do what I need for some time yet, keeping me from worry if Im not able to charge for a while. Because of this reporting, I can see what tasks use up the battery the most, giving me a better understanding of battery power. Easy to read, has never crashed on me, and I highly recommend it. I have it also on my iPad.
splitz! about Battery HD+, v2.60