I'm going to compare to Glympse, since that was what I researched the most before deciding to make Graticule, but it might apply to the others. Differences: -

I'm going to compare to Glympse, since that was what I researched the most before deciding to make Graticule, but it might apply to the others. Differences: - no time limit on the tracking link - it's not just for driving; surprisingly I stil got enough signal to use it even when paragliding at 1800m/5905ft (can obviously vary) - no need to pick a destination (disadvantage: no ETA) - just hit start and send your link (they mostly fixed this, after I released Graticule, in Glympse Express) - privacy oriented, no social stuff (good or bad, it depends I guess) - choose your location source: precise (GPS) or approximate (wifi/cell triangulation), for privacy or battery reasons - choose the beacon interval, for privacy or battery reasons There's probably more, but it's been a while.