Tempomat is described as 'Continuous monitor integration monitor for macOS, sits right on the menu bar' and is an app. There are six alternatives to Tempomat for Windows, Linux, Microsoft Visual Studio and Mac. The best alternative is AnyStatus. It's not free, so if you're looking for a free alternative, you could try AnyStatus extension for Visual Studio or BuildNotify. Other great apps like Tempomat are CatLight, CCMenu and CCTray.
AnyStatus is a lightweight desktop application designed to bring you metrics and events from various sources such as local services, network, processes and integration services, including but not limited to TFS, Azure DevOps, Jenkins, AppVeyor, TeamCity and more.
CatLight shows build status notifications in your tray on Windows, OS X and Linux. It can get build status from Jenkins, AppVeyor, Travis CI, TFS and VSTS. For Team Foundation Server, Catlight supports new vNext Team Builds, as well as XAML builds.