Synchronisation across wahoo apps and elemnt rival

Hi everyone,
I’m new to the forum and would like to ask some questions about Wahoo apps and devices:

  • It’s Normal that my zwift workouts get synced to the SYSTM app but not to the elemnt app or the wahoo app? Should your history not be the same across all Wahoo apps?
  • is the rival watch suited for activities like mountaineering and cross country skiing? Can it withstand temperatures of about minus 20 degrees Celsius?
  • how does the rivel measure altitude accurately without having a thermometer inside and can you adjust barometric altitude in activity?
  • how does the rival compare to the Suunto 9 baro?