I used to have an iPad, and watching an entire movie on the Netflix app drained the battery by 2-4%. The Reddit app took 15-20% of the battery over breakfast, so I switched to Apollo. Then, I could get through breakfast with the battery still at, say, 95%. Clearly, the official app did something else in the background; since they didn't disclose what, it was probably nefarious. One day, Apollo stopped working, and that was that.