I'm using a COOSPO that syncs with my phone. Rather inexpensive from Amazon.

Seconded MapMyRide . Seems like has plenty of useful features and ad free. One device for multiple bikes, keeps podcasts and takes occasional photos. Amazing technology these smart phones, I strongly recommend if you're still on the fence.

I have used a wired Sigma bike computer for years to give me the basics while I’m riding; speed, distance, average speed. It is pretty uncluttered for that stuff.

I wear an iWatch primarily for HR and elevation. It gives more data, splits, zones, route, etc. that is not necessary in real time.

John

My main concern about using my phone is the fear of getting assisted living facility pop ups while I’m riding.

John

If you only care about speed and distance, just get a simple Cateye bike computer and be done with it. They are very reliable and the wired ones are very cheap too.

This ^

Basic wheel sensor. No need for GPS unless you want to capture the map track of the completed route and transfer that data. Basic speed, time and distance can be gotten from a Cateye or something equivalent

Something like this, classic style Bicycle Speedometer? Or Beacon Cyclometer? I'm more familiar with wired cycle computers like Avocet, Cateye, and Sigma; and wireless varieties like Garmin and IpBike with an Android phone. In principle, they all work the same by counting the number of wheel rotations and multiplying by the wheel's circumference to derive the speed and distance traveled. I believe the older variants, vintage, don't allow one to define the wheel circumference. You still could get dropped data, but nothing as bad as GPS satellites/phone towers. The accuracy will be as good as the measurement of the wheel circumference and far more accurate than GPS from a phone or a handheld (unless that's a survey-grade device).

yes, well, the planet could be hit by a giant asteroid that would wipe out humanity and bring on the next ice age.

worry about something that you can affect. GPS jamming / spoofing is a thing.

don't ask me how I know

/markp

The last thing I desire to deal with is having to charge a phone or GPS device every day while on tour. Cateye Velo 8 is my go to computer. Never had one fail on me, battery lasts about 6 years. Less landfill waste and excellent reliability.

The Bontrager RIDEtime Elite is something a little bit atypical, because it is in many respects like an old-school digital cyclocomputer - long life with a coin cell battery, no GPS, no granular recording of data - but it works with ANT+ sensors.

Mine has worked reliably with Garmin's Speed Sensor 2 and Cadence Sensor 2 (no magnets!) and with a Polar H10 heart rate monitor. All of those have both ANT+ and Bluetooth. So, if I also want to "record the ride", I can do so using Cyclemeter on a phone (Bluetooth) that stays in my jersey pocket.

RWGPS or Komoot has treated me well