I recently switched to a Garmin Forerunner 165 - just this week. I had been using a Fitbit Versa 4 for the last couple of years and liked it. However, as time has gone on, I've noticed the Fitbit and App are starting to go way downhill....and eventually the GPS stopped working entirely. I've noticed that the Garmin - when compared to my Fitbit - seems to calculate my "Calories Burned" much differently. For the same activities per day, I'm burning about 1,000 calories less per day when compared to my Fitbit. I don't know if the Fitbit has been incorrect this whole time......or if it is the Garmin. I've entered in all my information correctly - age, gender, weight, height, etc. However, I've only had my Garmin about 5 days so far. I've checked the Garmin Connect app - and everything looks okay....my stats, etc. But the Calories Burned figured are depressingly less when compared to my Fitbit. Is this normal?? Which one is normally more accurate?? I've noticed that my physical activities with the Garmin are underreporting my Calories Burned by about 150 per hour(cycling, running). But it really seems to be off during rest. By the end of the day, I'm about 1,000-1,200 calories less per day compared to the Fitbit. Not sure if I'm doing something wrong on the Garmin.....or if the Fitbit was just way off.