Startup Xona Space Systems hopes to provide an unspoofable alternative to increasingly threatened GPS.

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We tested the best Bluetooth trackers to find out which ones were actually worth buying. We loved the Pebblebee.

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Finally, the Garmin Veny X1 has just 50 meters of water resistance. That’s enough for brief periods of surface-level swimming ...

I mean, there's a lot of data available from the cell phone networks, from the phones themselves. Tt stores a lot more than just calls, obviously. You get text, GPS routes any app activity.