We specialize in creating custom applications and measurement tools

iOS Watch Timegrapher

Updated October 2022

Timegrapher X analyzes the ticking sound of a mechanical watch to measure its accuracy rate, beat error, and amplitude. Learn more

Long-term timegrapher

October 2022

The "LONG TEST" module is a graphical data logger, which helps you observe the long-term behavior of a watch. Various chart indicators are available, such as average rate, moving rate history, rate drift over time, and more. Measurements for up to 12 hours can be conducted for in-depth analysis of the watch being tested. Learn more

Spectrum Analyzer

Updated October 2017

Spectrum Analyzer for iOS is a powerful real-time frequency analyzer. Designed with musicians and recording engineers in mind, it can also be used by anyone interested in the world of sound. Learn more

Room / Speaker Tuning

August 2017

This article explains how the built-in Pink Noise generator and RTA module can be used together for quick room / PA system tuning. Learn more


May 2016

Convert your iDevice into a portable digital oscilloscope! An affordable way to plot audio signals, monitor equipment, analyze events and test circuits. A great learning tool - get the basics of signal measurements without spending several hundreds on a real scope. Learn more

How to Use

Updated February 2017

A quick-start guide for the Oscilloscope app. Learn more

E-Drum Latency Meter

September 2018

EDLM iPhone app was developed specifically for measuring latency in electronic drums. It connects to the input and output points of an e-drum system and provides automated and accurate latency measurements. Learn more

Tips for Reducing E-Drum Latency

September 2018

With a couple of tweaks latency can often be reduced, especially for PC/VST setups. Check the Reducing E-Drum Latency article for more information. Learn more

Pad Clone

September 2018

Large drum pads and acoustic triggers may need more time until the hit vibrations reach sufficient amplitude, adding up to 1 ms of latency compared to synthetic measurements. To account for this, instead of the reference trigger pulse, you may wish to use a recording of the actual drum pad being hit. The EDLM app can import up to two user pad recordings so results can be compared. Learn more

Audio Latency Meter

August 2018

LatencyMeter measures the real-world Round Trip Latency (RTL) of a given iOS audio system. It functions by playing short test tones while simultaneously recording (listening for) the tones to return back to the input. Learn more

Audio Interface Comparison

August 2018

Here we compare some of the popular iOS audio interfaces used during the development and testing of the LatencyMeter app. Learn more

LED Audio Spectrum

March 2015

LED Audio Spectrum emulates a classic spectrum analyzer device. The app uses the iPhone's microphone to visualize music through colorful 2D graphics that bounce to the beat! Learn more


Updated Jan 2017

MetroTimer is the most accurate metronome app in the App Store. It provides highly accurate audio and visual feedback, and easy to use timer to track your practice sessions. Learn more


November 2015

Retro-Fi allows your music collection to be heard as it was in the days before color TV, home computers, and mobile devices! For those who loved listening to rock'n roll on tiny transistor radios, those who find modern digital audio too clean, and those who want to create a retro mood with music, Retro-Fi is the solution! Learn more


Updated 2019

ClockMaster is a clock timing software, in many ways similar to watch timegraphers, but specifically designed to work with mechanical pendulum clocks. Learn more

Upcoming Major Update

June 2019

After many years of service the ClockMaster app gets a major update. This is a rewrite from scratch actually, with lots of improvements such as long-term measurements, target beat rate database and more. Learn more