How many times to calibrate watch?

i picked new apple watch during pre-black friday deal @ best buy. own several apple devices, wanted try watch when prices came down bit. overall, watch, have question calibration aspect.

run on regular basis , have garmin forerunner 201 (very old), wanted use watch itself. tried several times without iphone 6p , expected, mileage , pace way off factor of approximately 1.25.

followed instructions resetting calibration data on watch, , set calibrate phone. went hour run @ usual pace using newly purchased armband , mileage workout app matched garmin within tenth of mile after running 7 miles. of course, using phones gps, not surprising.

next time ran, ran without phone , watch off again factor of 1.22 not expected. had 1 run before calibrating watch off same amount, margin of error same had experienced before calibrating watch.

how many times have run phablet on arm before watch learns stride length? has been successful watch calibrations? if so, how may times did take?

idea of smart watch fitness tracking , knew before buying it, calibration going issue runs. however, read said should run @ least 20 minutes phone , watch measure stride length future use without phone. after 60 minute run, stride length calculation should accurate after 12,500 plus steps.

thanks

txwatch

 

i have run 20 50 miles phone in multiple attempts calibrate. mine pretty off same error factor without phone (aw says 5.65 miles on 5.07 course). , you, when run phone, within few hundredths. in humble opinion, apple's calibration not work.

 

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