I am planning to buy one.
The Dr Chrono (Carbon Chrono) for $119 maxed out at around 530fps. Albeit it works great with .177 pellets. The limitation was not in the phone app, but either in the unit's bandwidth-envelope design (most likely), or the unit's firmware (easy fix). The bandwidth of the original unit was probably not designed for reading higher frequencies that are required at the higher pellet velocities of the PCPs. So they most likely had to redesign some of the internals to allow for faster reading of the returning signals. The redesigned electronic parts are negligible costs themselves, and the firmware update is not that involved either. But since FX is not a design/software company they had to pay for those services probably with a good markup. My estimate that the unit itself from China costs about $30 to manufacture in large quantities. On Aliexpress they would sell them for around $69-79 if they would be available. Profit is probably around $60 for FX, with around $40 for the dealers with worldwide shipping costs, customs/taxes account for the rest of the $199. But these are my wild guesses only, I do not have any insight into the real costs.
In my opinion, it's worth the $199 price considering the lack of other alternatives providing the same convenience and accuracy. The only unit that may come close in velocity envelope is the X-Radar (Blue) Field radar designed for airsoft use. This is about the same size and goes up to 900fps, but only displays on a built-in LCD screen. There is no voice readout and bluetooth. It was discontinued 2 years ago, but still can be found between $149 and $250 online from various paintball dealers.
An inherent limitation of the FX Chrono design that you will not be able calculate BC like with the Labradar. The internal antenna does not have a horn, thus it's not directional for being able to measure at longer ranges. It has a wider angle (weaker signal) for the convenience of being able to position it fairly easily near the muzzle without having to have it aligned and aimed like the Labradar. The accurate measuring range is just not that much, my guess is maybe 1-2 meters from the muzzle maximum. So deriving an accurate BC through the entire shooting distance is not possible with the current design.
In my opinion
FX would benefit from making the accompanying Phone app open source, or at least make a version of it open source.
This would allow for the development of features that FX just does not have the time, expertise, or the funds to invest in. There is minimal danger for FX here because the firmware that resides on the unit itself and is locked. A feature rich phone app would keep customers more involved, interested, and may allow for innovations for further interface to other hardware or software application. For example, linking the FX chrono Phone app readings to the Strelok Pro or Chairgun app could provide an automatic shooting solution without manual entry except for the distance. Also, working together with ATN (computer optics/scopes) the FX Chrono could supply the velocity input for ATN scopes that already have a bluetooth distance measurement add-on (ABL).
For now, a simple and helpful addition would be the use of a bluetooth earbud (linked to the phone you are using with the FX Chrono) would announce the velocity in your ear directly instead of having to use the phone's speakerphone. This helps in noisy environments, and also helps to keep your eyes on the target, There is such bluetooth wireless earbud on Ebay for about $2 from China and $4 from the U.S. Comes with the USB charger cable.
https://www.ebay.com/sch/i.html?_from=R40&_nkw=Mini+Wireless+Bluetooth+Headphone+In-Ear+Earbud+&_sacat=0&_sop=15&LH_PrefLoc=1&rt=nc&LH_BIN=1 
