In the recent AIRS update to V2.7.7, we added support for the pedometer sensor of the Nexus 5. This low-power sensor can be accessed by subscribing to the PD sensor. The returned value is the total number of steps during the current recording session.
Using this sensor does not consume much power since the Nexus 5 uses an efficient hardware implementation of the recognition algorithm.
You can view your daily steps since the recent Storica V1.6 update in the detailed information list, providing you with the number of steps for a particular day.
Update and try it out!