BreakMeter

Anyone used this app?  I just downloaded it, haven't tried it yet. looks interesting.

I haven't, but just generally using my iPhone's spirit level, I've put it down on a flat surface, had it read 0°, picked it up, put it back down, and had it read 1° and vice versa, so I'm skeptical of how consistently precise the iPhone or other cell phone can be at this stuff.

My only concern is that the imperfections in the green can tilt or not tilt the phone enough to get an accurate reading.

From what I heard these apps can have some big error in their values.

So, quick follow up: I was at the putting green last night and it was getting dark, so I downloaded it to work on feeling the break since I couldn't really see the break well (and I'm terrible at reading greens anyway). I hastily calibrated it on a garbage can which was the flattest and most level surface I could find. Once I got a feel for what the relative differences were between the various degrees of break, I have to say, I was blown away at how helpful and consistent it was at predicting putting line. Even moving it a foot right to left at one point identified a subtle ridge that caused putts to move in opposite directions. One downside is I left the screen on in my pocket while going to hit some bunker shots afterwards and it killed my battery on my iPhone 6. Regardless, and it was a limited sample, the app worked way better than I thought it would.

Sounds tedious to get your phone out on every green to get a read but then again I putt really fast after pacing the distance, taking one look at the line, one practice swing, and GO.

Well, in fairness, you would only use it in practice. Can't really use it in a round since it'd be against rules. [quote name="nevets88" url="/t/82949/breakmeter#post_1163022"]I compared the readings from these types of apps to those from a Husky digital level and found discrepancies. I'll use level apps for projects around the house but not for golf. [/quote] Haha, that seems opposite of what I'd do, but I guess I don't put as high a value on putting as you do!