I just found this article after posting this information on another topic. my information is also valid here, so here goes.
I'm surprised that Dexcom is cheaper than the Libre, it's not where I'm from...
Pretty much everything that people said regarding the Dexcom vs Libre is true, but here's a couple of reasons why Libre is better for me that Dexcom.
Background: I've been using Libre now for about 2 months. I used Dexcom for about 10 months.
I moved from Dexcom to Libre primarily due to cost. I live in New Zealand and have to fully self fund. For me, the Dexcom transmitter is $750 and a pack of 4 sensors $530. I could make each sensor last at least 22 days and therefore, 4 sensors would be enough for one transmitter. So, bottom line is, 3 months cost me $1280 for a total of ~$100 per week.
Libre costs for me $97.93 for two weeks for a total of ~$49 per week. Half the price.
Here's my summary of why's and why not's.
Why use Libre:
I like the Libre sensor insertion technique SO much better than the Dexcom.
The Libre sensor is flat compared to the Dexcom Sensor/Transmitter arrangement.
Why not use Libre:
No app currently on iPhone. (Apple currently restricts the use of the NFC - this apparently has been removed in iOS 11, but it hasn't yet reached the end user for Libre)
I have to admit that I've had accuracy issues (but minor) - not enough to swing be back to Dexcom.
Why use Dexcom:
Accuracy is always on point.
Alerts.
Follow me app (for parents)
Why not use Dexom:
The phone app is ****. It's history is limited. It's configurability is terrible.
Alerts - You can't turn off or customize alerts - why would you want to? Because if I have high sugar and correct it, it still takes 2-3 hours to come right all the while the painful alerts! I'd also like to change the damned volume of the alerts!!
When I had it, it wasn't on Android. Is it now? I think it is...
The application of the sensor is terrible.
The size of the sensor and transmitter is very large compared to Libre.
The transmitters are ONLY disposable - why not use rechargeable batteries? LIR2030!!!!! Money / profits, that's why.
I think that just about covers it. If they were the same price and Dexcom fixed their app, I'd probably go for Dexcom. But price is the main factor. Otherwise, Libre for me it is.