# Freestyle Libre in the US: 10-day vs 14-day sensor comparison

**URL:** https://forum.fudiabetes.org/t/freestyle-libre-in-the-us-10-day-vs-14-day-sensor-comparison/5490
**Category:** Tipwiki
**Tags:** freestyle-libre
**Created:** [November 13, 2018, 8:33am UTC](https://forum.fudiabetes.org/t/freestyle-libre-in-the-us-10-day-vs-14-day-sensor-comparison/5490 "2018-11-13T08:33:47Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![DaveJ](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.fudiabetes.org/davej/32/3471_2.png) [@DaveJ](https://forum.fudiabetes.org/u/DaveJ)
#### Post date: [November 13, 2018, 9:05am UTC](https://forum.fudiabetes.org/t/freestyle-libre-in-the-us-10-day-vs-14-day-sensor-comparison/5490/2 "2018-11-13T09:05:31Z")

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> [@Freestyle Libre: going from 10 to 14-day sensors](https://forum.fudiabetes.org/t/freestyle-libre-going-from-10-to-14-day-sensors/5306/17):
>
> Everyone I’ve talked to on the 10 day seems to be happy, for the most part, with the accuracy… Do you think it’s sheer coincidence? Do you think the 14 day sensor could perform differently?? I got my confirmation for the 14 day system, but now I’m nervous!

The conjecture is that MOST of the differences between the two is in the software/app/firmware in the scanners. The sensors are virtually the same, other than some alterations in the data packets, which is what is causing the incompatibilities with transmitter devices and 3rd party apps. As for inconsistencies, that facet is pretty well accepted that a certain percentage of the sensors are “duds” whether they are 10 day or 14 day models. In the US, reports are that Abbott has been pretty good of late about replacing them via coupons for replacements.

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