Time is of the essence



Cesium is the one true standard for the measurement of time. At a frequency of 9.19 GHz, atoms of the element Cesium control the world's most accurate atomic clock. Minaware Cesium, however, relies on your PC's internal clock, which most likely is not atomic.


Set a timer or alarm for any point in the future but not beyond the year 9999. Cesium will then ceaselessly count down every second, minute, hour, day, and year until the job is done.


A timer is utilized traditionally to track the time when cooking or baking or torturing. The common kitchen timer ticks for a while and dings at its conclusion, but won't be heard by deaf ears. Cesium, on the other hand, has both visual and auditory alarms, and will be in your face and in your eyes and in your ears. But rest assured, for the time being, it'll stay out of your nose and mouth.


Red is the color of danger, the color that attracts the most attention, the color of raspberry jam. In those crucial final moments of a countdown Cesium will brighten gradually into a passionate, alluring, seductive, alarming red. If you stare too long, it'll stare back into you.


I use Cesium for captcha wait times, the ones that are crazy long like 5 minutes. Too many times I'd switch to another browser tab, forget, and return to an expired session. Really, forgetting is the ultimate human verification, but I digress. With Cesium I never miss my window of opportunity!

Release Notes

  • Current Version: 21.10
  • Quick 45 21.10
  • Add Five Minutes 19.12
  • Fonts 19.1
  • Quickstart Menu 19.1
  • New Look 18.12
  • New Icon 18.12
  • New Thread Framework 17.10

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System Requirements

  • Windows XP, Vista, 7, 8, 8.1, 10

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