Hi all. I'm the developer of COGO Survey Calculator, a COGO app that's been on iPhone and iPad since June. A lot of it came from surveyors' feedback, including a Reddit thread about offset reference marks that turned into the common tangent and two-unknowns tools.
The Android version is built, but Google makes new developer accounts run a closed test with at least 12 people for 14 days before an app can go public. So I'm looking for surveyors, techs, party chiefs and students with an Android phone (Android 8 or newer) who'd try it and tell me what's wrong with it.
What it does
- Bearing/distance traverse with running coordinates. Curve legs (chord bearing, radius, arc length, left/right). Legs can be typed in feet, metres, US survey feet or links.
- Closure: misclosure distance and bearing (azimuth or quadrant), precision 1:N, Compass or Transit adjustment, area in acres or hectares, metes-and-bounds description.
- Inverse, radiations, intersections, 3-point resection, line tools, station & offset, sideshot reduction.
- Horizontal and vertical curves with stakeout tables, alignments with spirals.
- State Plane (SPCS83 plus an SPCS2022 preview), UTM, grid/ground.
- CSV import/export in your column order, DXF (R12) and a one-page PDF report.
It works fully offline. No account, no ads, no tracking, and the app has no internet permission at all.
How to join
- Fill in this Google Form in the comments
Please stay in the test for the full 14 days. Google only counts you while you're opted in, so don't tap "Leave the program". Opening it now and then helps too.
Everyone in the test gets COGO Pro free while the test runs
What I'd most like to hear
- Wrong answers. If a number disagrees with your data collector, Carlson, Civil 3D or your hand calcs, send me the inputs and I'll fix it.
- Anything slow or awkward to enter in the field.
- Crashes, and which phone you were on.
Comment here or DM me. Thanks for reading.