iStat Mini is a compact way to keep an eye on your CPU, memory pressure, disk usage and network activity. Simply slide out OS X Yosemite’s Notification Center to glance at the stats, then slide it back again to free up your workspace.
What's new in iStat Mini
Added battery stats.
Added load average and uptime.
Improved support for macOS 10.12.
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Pretty sure this was released back in 2014...indeed 17th of October of 2014 according to both the AppStore and bjango's website, so I'm at a loss as to why it's been reported as released on the 4th of January, 2016...(it's not been updated eversince)