Hopefully this is not a duplicate post. I searched and could not find a similar thread in the past year, nor in the search function.
I have a Razr M smartphone and I have been searching for a cave survey app or one that would suffice to gather the distance, cline, and azimuth, (sketch by hand the old fashioned way). I have come close, but no cigar. So far I have found a decent level/clinometer:
URL: (https://play.google.com/store/apps/deta ... ult#?t=W10
A decent compass:
URL: https://play.google.com/store/apps/deta ... ult#?t=W10.
And a so-so distance meter: This one does good on compass and OK on distance, but sucks on inclinometer.
URL: https://play.google.com/store/apps/deta ... ult#?t=W10.
The compass works as an electronic compass similar to watches and car mirrors (I would guess). The cline works using the phone accelerometers and maybe the gyro. The distance works via the camera range finder.
But, I have not found all three on one app that works right for all three functions. If each function can be programmed individually, then there is no reason they couldn't all be included in a single app. BTW, I only checked out FREE apps and I don't know if the accuracy of a smartphone would be close enough for cave survey. However, with my eyes and a Suunto, it can't be much worse. I'm not a programmer so would not have the first clue how to go about writing and app. Using an inexpensive (or at least less expensive) smartphone in a cave might still be more cost effective than trying to find a disto and associated hack.