The WOO 3.0 is here now for a little while and it’s most likely to change the game. Although we are not quite sure if that is in a positive way. Since 2015, when WOO introduced its device to record your kite sessions -including jump height- the sport got an interesting addition to it. Although it is a fun sport, some sort of competition was added to it; Who can jump -world wide- the highest?
Recently WOO offered a rather affordable way to buy the 3rd generation. The business model has little other ways to get money in, so it seems a smart way to collect some fresh coins. It does have added value like a better battery, better mount and an instant smart watch read out possibility. But there seems to be a big catch in this WOO 3.0 and in the end it may have ruined its own game. Or should we all get rid of our previous version and buy the 3.0?
Soon after the launch of the WOO 3.0’s the big question does it record higher jumps compared to the previous versions? popped up on several forums. The answer is partly true but also more complex than only that. We took a bunch of different versions on one board and made some statistical comparing on the data. After looking into it deeper and deeper we think the level playing field between different WOO generations has gone.
We see unexplained differences and structural variations between the newest WOO and the previous versions. The WOO 3.0 can give much higher maximum jump heights. How is that possible? We tried to contact WOO -without succes- so for the moment we can only guess. Below you can read what efforts we did to properly compare them and our conclusions is quite bitter. But to stay on top of the game you better switch to the 3.0 version.
This test isn’t about the accuracy it self. So we didn’t investigate if 10m readings are really 10m. This test is neither on the added value of the latest version of the WOO (better battery, connection to a smart watch or the waterproof mount). The test is about a level playing field. Is each Woo version – to some degree- comparable?
Comparing WOO’s properly isn’t easy. For example WOO is updating it’s firmware from time to time (for the WOO 3.0 for example already has had 3 versions). Do those versions influence the data? We cannot be 100% sure. Since the 1.0 vs 1.0 in this test (with different software versions) is a lot more different compared to our previous tests, it suggests different software versions play an important role. Another problem is the time recordings; the difference in readings of the same jumps (gradually) deviate easily 10-15 seconds in one hour. Which is much more as we would expect from a measuring device and makes comparing jumps for this test more difficult.
It is not difficult to see there is something strange with our data. The difference in the maximum jump height in our test is up to an immense 4.4m (the 1.0 version is 30% lower compared to the Woo 3.0). Is this an incident or are there structural differences?This specific, highest jump on both 3.0 WOO’s (at about 20 minutes kiting) had 16.1 and 15.3m, where the Woo’s 1.0 only had 8.6 and 5.7m. An even worse difference compared to the complete session results (where the WOO’s 1,0 found up to 12.3m on a completely other jump). Obviously the Woo 1.0 ‘s have had totally different moments for the highest jump, where the 3.0’s had quite similar readings. The WOO game starts to sound a bit like a lottery!
To see whether this mis-match was an occasional incident or an structural deviation we made several X-Y comparisons. In those X-Y graphs, for those who don’t know them, the R-squared should be close to 1.0. Low R-squared indicates there is no link between the two readings (of the different WOO’s). The “a” in Y=aX tells you what the structural difference is between X and Y, where 1.0 means they are similar.
The 3.0 to 3.0 data looks decent. With an 0.8 R-squared and a slope of 0.98. This means pretty much a level playing field between WOO 3.0 users. But mind you that a more deeper statistical analysing shows an easy chance of having a couple of meters differences on 2 similar 3.0 WOO’s on the same board, on the same jumps in the top league competition -let’s say above 20m (the 99 % CI is about 10%)-.