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Cuckoo Clock Calibration

by Nir Hamzani

  • Utilities
  • Paid
  • Zombie
  • Small & simple · 97
View on the App Store
Rating
4.9
36 ratings · US storefront
Top 94%among 165 Utilities apps
Last update
Aug 1, 2020
Version 2.8
Size
20 MB
Category
Utilities
Tracked since
Oct 10, 2026

Estimated revenue

A model estimate with a likely range, not a reported figure.

No estimate. Apps outside the grossing charts, and some countries, have no reliable rank-to-revenue curve, so we show nothing rather than a guess.

How this estimate is made

Rank: we take the app's best Top Grossing rank on the latest chart day. Category ranks are converted into an equivalent overall rank, because a #10 in Finance earns far less than a #10 overall.

Curve: that equivalent rank is read off a rank-to-revenue curve anchored on public company revenue and market-data reports for the US iPhone App Store.

Country: the curve is scaled per country (Japan is roughly a third of the US, Türkiye under 1%). Where we have no scale, such as China, there is no estimate.

Range: the likely range widens with country, category and chart depth. It is a plausible span, not a statistical confidence interval.

Not included: ads, payments outside the App Store, and any difference between gross sales and what the developer keeps. Low confidence means indirect data; medium means several independent sources agree.

Full method

Screenshots

As shown on the App Store listing.

About this app

Text from the App Store listing.

The best and most accurate app for Cuckoo and Pendulum clocks calibration.
Easily measure your Clock beats period and adjust it to a known correct value.
Turn your iPhone into a precise train count sensor with an unbelievable 0.001 milliseconds (1μs) accuracy!!
Get a quick and precise drift reading of how many seconds/minutes your clock is going to gain or loose per day.

Every Cuckoo Clock owner knows that a mechanical clocks are not as accurate as modern day quartz clocks. This is because the clock mechanism is influenced by temperature, humidity, barometric pressure, breeze and others environmental conditions and therefore requires frequent adjustment.

When you are regulating the pendulum of your Cuckoo Clock today, you are attempting to achieve the best timekeeping possible by a trail and error method by lifting the pendulum bob up or down and hope for a better accuracy.
Using this app you can finally get a reading of your Clock ticks timing and precisely calibrate it to a known value.

How to calibrate your Clock using this app:
1. Run this App and measure your Clock timings using the iPhone microphone
2. Use the Signal Gain and the Detection Threshold sliders to adjust the measured signal
3. Select a reference timing for calibration from the clock reference table or set your own reference timing
4. Read the accuracy level of your clock vs. the reference timing
5. Adjust your Clock pendulum bob to get the best accuracy!
6. Review how many seconds/minutes your Clock will gain or lose per day based on your current calibration

The app will presents your Clock beats period reading as well as BPH (beats per hour) and BPM (beats per minutes) values.
An accurate waveform display of the microphone signal will help you to adjust the tick readings for the best measurement.
Animated Indicators will guide you through the calibration process.

Manage the app Reference Timings table and add user defined clocks in addition to the predefined ones to support all your clocks.

This app will turn your iPhone into a powerful measurement tool which normally costs hundreds of dollars.

What’s new

Release notes for the latest version, as written by the developer.

v2.8
Original · Polish

A digital clock display was added to enable easy current time reading

Rank history

Daily position in the Canada charts. #1 is at the top.

Best rank
#44
Current rank
#44
Days charting
2 of 7

On the charts today

Small & simple score

How realistic it is for a small team to build something like this.

97/100

Small & simple

  • Developer size100% · 25

    Developer: 1 app on the charts

  • Audience size100% · 20

    Ratings: 36

  • App size100% · 10

    Size: 20 MB

  • Price model100% · 15

    Price model: paid

  • Demand proof90% · 30

    Best rank #3, 9 countries

An indicator, not a fact. We can't see team size. Calculated Oct 24, 2026 · method i2

How the score works

Version history

  • 2.8LatestReleased Aug 1, 2020