Garmin recently entered the ballistic chronograph market with their Xero - it's the closest thing to actual magic I've experienced with a piece of technology. Chronographs are notoriously finicky, since you are trying to accurately measure the speed of a bullet in an uncontrolled environment.
Some optical chronos make you shoot through a very narrow window [0] which restricts you to a tiny shooting position and don't work in many natural lighting conditions. Some attach directly to the gun or barrel to allow any shooting position but are very sensitive to offset and distance and can't be fitted to a majority of pistols and rifles to work up load data [1]. Some higher end models get around all of these issues by using radar [2] but the implementation is tricky. The unit is about the size of a laptop, has to have the flat side pointed perfectly downrange, and collects data in a window triggered by a recoil or audio sensor. Practically this makes it unusable at a public range with other shooters in adjacent lanes because you have a lot of gunshots and other projectiles and spall wizzing around at all times creating a mass of false or irrelevant data. The radar units sometimes have Bluetooth connectivity for an app that records data strings and allows you to change sensitivity settings on the radar. The app is terrible and the physical UI on the unit is atrocious as well, and most range sessions devolve into tweaking multiple sensitivity params endlessly in a futile effort to get only your own shots to register, inevitably bumping and misaligning the radar in the process.
Which brings me back to Garmin, who somehow managed to release a tiny unit [3] that is the size of a GoPro, has only one settings option (fast or slow projectiles), and simply WORKS. It has a simple and clean UI but the biggest thing is how it somehow picks up all of your shots without the need for an external audio or recoil trigger to start collecting data, and never picks up data from adjacent shooters. I truly don't understand how they managed this because it isn't sensitive to alignment like other units were. As long as it is on your bench or vaguely pointed downrange from near your position it filters out all of the other shots.
This wasn't an incremental product improvement either, they somehow launched their first product with superior UI, better form factor, better battery life, superior app integration, impeccable data quality, and better commercial availability than all of the previous solutions. When I show it to other experienced reloaders at the range they literally cannot believe how well it works. The only thing it doesn't compete on is price, which is fine because the reloading/shooting market that needs this unit is fairly well heeled and it still costs less than the combined used prices of all the various chronographs this replaces. Their product team hit this one so far out of the park.
0 - https://www.caldwellshooting.com/range-gear/chronographs-and...
1 - https://magnetospeed.com/v3-ballistic-chronograph
2 - https://mylabradar.com/product/chronograph/
3 - https://www.garmin.com/en-US/p/771164