Ever wanted to know the most exact of exact times? Makrr brings you the answer with the The Official U.S. Time app, powered by the NIST, USNO, and time.gov. We do not guarantee accuracy and this should not be used to establish traceability to the NIST or USNO.

Official US Time alternatives

Watch Tuner Timegrapher

Watch Tuner Timegrapher is a mechanical and automatic watch testing application. It displays the frequency diagram of the watch and measures rate, beat error, amplitude and beats per hour. If you have any questions, suggestions or any troubles using this app - dont hesitate to write me.

  • size 1.3 MB

US Time Zones

US Time Zones is a simple conversion tool made to help you quickly convert between time zones in the Continental United States. It was purposefully kept simple to help those, such as our developers, who cant remember to add or subtract one or two hours when converting times. It currently only covers the four time zones in the Continental United States, namely: Pacific Time, Mountain Time, Central Time and Eastern Time.

  • rating 4.0
  • size 0.5 MB

Hairspring

Hairspring turns your device into a powerful mechanical watch timing machine. It measures the precision of mechanical watches, with an accuracy of at lease 1s/day, by analyzing the tick-tock sound using the microphone of the device. A detailed usage guide can be found here: http://www.diversminds.com/Hairspring/Hairspring.php

  • rating 3.88889
  • size 7.7 MB

Emerald Time

Emerald Time uses Network Time Protocol to display the current time of day as defined by the international standard atomic clocks. Its accuracy is limited only by network latency and is usually accurate to less than +/-100 milliseconds. Emerald Time does not change the internal clock used by all other iPhone apps.)

  • rating 4.91667
  • size 1.4 MB

Emerald Geneva

This model of a complex mechanical watch contains many of the most complex complications found in real watches, plus refinements found nowhere else. The displays maintain the look and feel of a real mechanical watch, but with considerably more complexity than possible in real mechanicals and with the time and location accuracy of a modern computer. Like all other iOS apps, Emerald Geneva cannot set the devices internal clock.)

  • size 25.5 MB