A metronome will make it easy to follow the pace while you sing, or in lessons. A good metronome is expensive so it's always handy to have an app like Virtual Metronome which does the same thing.
The software mimics a classical metronome, with a pyramidal shape on which a swinging pendulum marks the tempo. However, the software sends a signal with the beats/minute that we select to either our computers speakers or to our MIDI output.
It can be easily modified by users, and it integrates pre-established rhythms such as Largo or Moderato.
Although the program's interface is simple, it has enough options to replace a physical Metronome.