it seems that any method that requires phone location data as proof of presence necessarily leaves open the ability for me to either spoof the evidence or modify the target location. For example, IFTTT needs to be running on my phone to use the applet, but then I can just edit the applet to change the location to home instead of gym, so that my Beeminder goal triggers.
My girlfriend controls my Beeminder account login, so I can’t edit the goal itself, but handing over IFTTT or any other mechanism for actually detecting my location doesn’t appear to be possible while still allowing it to track the location.
Any tips to work around this? Ideally I want to avoid having to facetime at the pool each time to serve as proof, etc.