Chanting of this Lord Shiva Mantra has great significance. Lord Shiva has three eyes, so he is Triambakam.
Proper Chanting of Vedas' Mantras is required to feel their full power and benefit.
Ved mantras chanting is musical, and we chant them using three notes — middle pitch notes, higher pitch notes, and lower pitch notes. A vertical line above the letter notates a higher pitch note, and a horizontal line below the letter notates a lower pitch note.
Chanting of Maha Mrityunjaya Mantra in this App is done using the three pitches, which can be seen in the Sanskrit Lyrics of the mantra.