It doesn't sound like you have the alto/baro/temp issue that has beset some owners of F3 HRs (that issue has crazy large rapid swings in altitude). So it sounds like you've manually calibrated to 109m and then started a GPS activity (cycle, run or walk) and the altitude is not at the manually set altitude at the end of the activity. So the next thing to check is if your Altimeter Auto Calibrate setting (in the sensor settings menu) is On. If it's On then the watch recalibrates altitude to GPS altitude when you start an activity; so the error you see could be an incorrect GPS altitude calibration. If it's not already Off, it might be worth you doing a quick test with the Altimeter Auto Calibration set to Off.
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Sometimes it drifts up 200' while keeping the overall accent/ decent correct enough and if the weather is bad enough it can also invert
This offset of 6 m at 150 m is around 4%.
Normally, you need 10 degrees temperature difference for this, which seems a bit high in this case.
Were you wearing the watch before or did you put it on and start? In this case it might be plausible.
Maybe next time wear it an a jacket pocket so that it doesn't get warmed by body heat or the sun. Just for this experiment's sake, I'm not suggesting you should wear it like that all the time :)
If the results are close, it might as well be the temperature.
What I'm saying is that in a couple hundred walks 150 -> 2 is always correct while 2 -> 150 is never correct and always ends up higher. It's not just one instance.
There are undoubtedly more accurate devices available. If you need that accuracy, best to return the watch. If you want a watch that handles a large number of activities, is a great daily tracker, is loaded with metrics and customisation, while still looking damned good, then stay with the Fenix. It is a great, well rounded tool for many people who want a device that, while not the most accurate in some areas, still delivers a good result in a stylish package. I love the GPS accuracy of my Tomtom watch, but I loathe its lack of features, its cheap looks and inability to export to sites such as Myfitnesspal. However, for someone that just wants really good GPS in an economical package, it is a very good choice. We are all different and have expectations of our devices that reflect our personal requirements. Ignoring manufacturing defects (these happen with all manufacturers), if you find the features and performance don't meet your needs, buy something else. My needs are more general fitness, so trends are more important the perfect accuracy. That means I can live with my three devices being a couple of metres out (which is the most altitude difference I have seen between 2 x Tomtom watches, the Fenix 5 & 5X). That does not mean others do not have a valid issue. It just means that if you have an issue (once again, not just a manufacturing defect that can be resolved by swapping it under warranty), then you should be exchanging it ASAP for something that does make you happy. Life is too short, so go get that perfect watch.
To summarize what you're saying, "Pay $800 for mediocrity.. as it does a lot, but isn't great at anything" haha nailed it
To summarise, buy what you want, or if you don't like it, buy another watch, get off this forum and stop whinging? Your rudeness is amazing. If you have come here solely to gripe and offer nothing constructive, perhaps you may have more luck on the Suunto forum?
I do apologise for my response, but you have responded quite rudely to a post that was just my opinon, but you seem to be making a habit of that, judging by your other posts.
BTW, both of my watches work briliantly (I have an F5 and F5X, as I passed the F5 to my wife to get the 5X). GPS trace is not perfect, but it is close and the distance is always consistent. Altimeter is spot on (yes, I had an issue but that is resolved). All features work as advertised. Battery life is amazing. The app and web interface work brilliantly. It has a massive amount of metrics etc. I can customise the experience with great watch faces etc. Still sounding mediocre? Enjoy your cheap Suunto, but please do not criticise others for liking what they have purchased. Sure, talk about your own dislikes and likes. When you criticise other people for having an opinion that disagrees with yours, feel free to leave. Apparently you don't like anything about the watch, so why did you buy it? Oh sorry, does that make you mediocre, foolish, or just a troll?
