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Re:Fitbit is reportedly buying Pebble for around $40M by karlding on Thursday December 01, 2016 @10:47AM (#13080136)
Unless they've recently made changes, their OS firmware is actually built on top of FreeRTOS, with a bunch of backported features and memory optimizations for the lower-end and first-generation devices.

I think the most impressive engineering feat is what they're able to accomplish in their software, given their hardware limitations.

Re:Fitbit is reportedly buying Pebble for around $40M by rkangel on Thursday December 01, 2016 @11:01AM (#13080270)
FreeRTOS (while being absolutely fantastic) is 'just' a series of low level primitives allowing task scheduling and so forth.

The Pebble platform is a much richer 'operating system' for pebble apps.