Comparison

Cuckoo vs Cuckoo Clock Calibration

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Cuckoo

This utility app simulates a cuckoo clock, chiming every hour and half-hour. Users can toggle the cuckoo sound on or off and customize alarm modes. Additional sounds and background images are available for purchase, along with an option to remove ads.

Highlights
  • Hourly and half-hourly cuckoo chimes
  • Customizable alarm modes
  • Add-on purchases for sounds and backgrounds
  • Ad removal option
  • Toggleable cuckoo sound
Features
Read full description

This is "Cuckoo Clock". When this app running, Cuckoo sing every hour and every 30minutes. When you want hear Cuckoo Singing, press the switch button inside of bottom.Cuckoo Singing about 30 Hour. If you don't need Cuckoo, please switch off again. You can change Alarm mode and Custom. And can buy add-on for additional sounds, background images also remove Ad. App URL scheme is: cuckoo://

About

Cuckoo Clock Calibration

This app transforms your iPhone into a highly accurate sensor for calibrating cuckoo and pendulum clocks. It measures clock beats, calculates daily gain or loss, and guides you through precise adjustments for optimal timekeeping.

Highlights
  • Precise clock beat period measurement
  • Daily gain/loss calculation
  • Train count sensor with 1μs accuracy
  • Adjustable signal gain and detection threshold
  • Reference timing table with user-defined clocks
  • Waveform display for tick readings
Features
Currently charting
Read full description

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.

Screenshots

Cuckoo4 screens
Cuckoo Clock Calibration4 screens

Verdict

The call

The clearest difference is price: Cuckoo at Free against Cuckoo Clock Calibration's $0.99. Cuckoo Clock Calibration's advantage is rating (4.9 vs 3.4) and in-app purchases (none vs 1). On ratings volume and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Cuckoo is free to download; Cuckoo Clock Calibration costs $0.99 up front. Cuckoo sells 1 one-off in-app purchase. Cuckoo Clock Calibration asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Cuckoo Clock Calibration holds the better App Store score, 4.9 against 3.4. Both are backed by a comparable volume of ratings — 16 and 36 respectively. Written reviews point the same way: 68% of Cuckoo's written reviews are positive against 85% of Cuckoo Clock Calibration's.

UpkeepUpdate frequency

Cuckoo ships an update every 3 months, Cuckoo Clock Calibration monthly. The most recent releases landed on October 9, 2026 and October 17, 2026 respectively.

Scorecard9 real differences · 2 level
Cuckoo versus Cuckoo Clock Calibration: the parameters behind the verdict, then further details
ParameterCuckooCuckoo Clock Calibration
PriceFree — better$0.99
Rating3.4 (16 ratings)4.9 (36 ratings) — better
Positive reviews68.0% of reviews85.3% of reviews — better
Number of ratings1636 — better
Update frequencyEvery 3 monthsMonthly — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
Best chart rank—#68 — better
DevicesiPhone, iPadiPhone, iPod
Requires iOS17.69.0 — better
Further details — not scored
Size42 MB19 MB
Age rating4+4+
DeveloperToshihiko TamboNir Hamzani

Customer experience

Cuckoo

All ratings16 ratings
Positive56.3%
Neutral6.3%
Negative37.5%
Written reviews50 reviews
Positive68.0%
Neutral10.0%
Negative22.0%

Cuckoo Clock Calibration

All ratings36 ratings
Positive97.2%
Neutral2.8%
Negative0.0%
Written reviews68 reviews
Positive85.3%
Neutral2.9%
Negative11.8%

Bugs and requests

Cuckoo

Not enough reviews yet to summarise bugs or requests.

Cuckoo Clock Calibration

Reported bugs

7 issues
  • App closes after setting reference
  • App crashes on startup after reference beat memory use
  • App crashes
  • App crashes and requires reinstallation
  • App crashes on iPhone 6s
Show 2 more
  • App crashes on iPhone 7+
  • App crashes on iPhone 6s (v 12.4.1)

Requested features

20 requests
  • Accurate beat frequency display
  • Level indicator display
  • External microphone support
  • Plot period over time
  • Allow reference periods over 1 second
Show 15 more
  • Save measurement data
  • Allow frequency of 60.000 BPM
  • Repackage/rename for all mechanical clocks
  • Add Russian language
  • Add parameters for specific Swiss and Soviet clocks
  • Add lower beats per minute (e.g., 8 BPM)
  • Add a distribution chart for beats
  • Add seconds lost/gained per day display
  • Broader clock options/community sharing of references
  • More user-input references
  • Better graph or display for out of beat
  • Allow input reference beat rate directly by digits
  • Add a feature to help get the clock in beat (e.g., which way to bend crutch)
  • Invert display option
  • Explanation of calculations for drift and instantaneous beat

In-app purchases

1 purchases

Cuckoo

One-time1
  • Cuckoo Premium Feature$0.99
None

Cuckoo Clock Calibration

No in-app purchases

Questions

Is Cuckoo free?
Cuckoo is free to download, with in-app purchases available.
Is Cuckoo Clock Calibration free?
Cuckoo Clock Calibration costs $0.99, with no in-app purchases.
Which has better reviews, Cuckoo or Cuckoo Clock Calibration?
Cuckoo Clock Calibration is rated higher. Cuckoo averages 3.4 out of 5 from 16 ratings, while Cuckoo Clock Calibration averages 4.9 from 36 ratings.
Do Cuckoo or Cuckoo Clock Calibration have ads?
Cuckoo shows ads; Cuckoo Clock Calibration does not.
Which is updated more often, Cuckoo or Cuckoo Clock Calibration?
Cuckoo ships an update every 3 months, and Cuckoo Clock Calibration monthly. Most recently, Cuckoo was updated on October 9, 2026 and Cuckoo Clock Calibration on October 17, 2026.

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