There's https://www.freestylelibre.co.uk/libre/ which I believe you can just order online (I'm considering one myself). You have to scan the sensor yourself(it stores the data between scans) so it doesn't trigger alarms like the dexcom but for gathering data about how exercise/diet effects your levels it should do the job nicely I think.
These were recently included in the coverage given by the danish government (at least in my area) and this is probably the biggest quality of life improvement I have received in at least 10 years of diabetes. Even though it's not as clever as some of the other systems, being able to get an idea of the level without having to find a secluded spot and prick my finger is a really great feeling. It also means I can actually check my levels while at a party for example, where previously I would put it off for a bit because it was inconvenient.
German insurance companies cover these too and I had them about six months before switching to Dexcom system. The NFC scanner provided is not accurate at all. The values are what they are and you can't calibrate them. Luckily if you own an Android phone with NFC reader you can use xDrip+ to scan the values and xDrip+ allows calibrations, so the measurements reflect your blood sugar much more accurately.
I'm having trouble with not feeling hypoglycemias and I'm having them quite often at night. Freestyle Libre by default doesn't automatically measure your glucose levels, but there is a hack with Sony Smartwatch 3, a strap and very custom and hacky android version which enables the NFC reader in Sony and you can get alarms to your phone on low glucose levels. It worked and saved me a couple of nights, but the Libre chips break easily and the system was kind of a drag to use in the end.
The sensors are quite pricey to get, each lasting roughly 2 weeks. Unfortunately the sensors aren't available on prescription yet. Let's hope this changes.