Comparison

ClockMaster vs SlitherSense

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

Head to head
About

ClockMaster

This app analyzes the ticking sound of mechanical pendulum clocks to determine their running rate and error. It's designed for accurate long-term measurements, allowing users to regulate clocks efficiently. Advanced features include printable reports and data export for in-depth analysis.

Highlights
  • Analyzes escapement ticking sound
  • Measures running rate in Beats Per Hour (B/H)
  • Reports error in Seconds Per Day (±S/D)
  • Supports long-term measurements
  • Generates printable PDF reports (Pro)
  • Exports raw data as .csv file (Pro)
Features
Read full description

>>> Check out the demo videos at ClockMasterApp.com ClockMaster is a clock timing software, in many ways similar to watch timegraphers, but specifically designed to work with mechanical pendulum clocks. The app analyzes the ticking sound of the escapement to determine the clock's running rate measured in Beats Per Hour (B/H). This rate is then compared to a specified Target Rate, and the Error is reported as Seconds Per Day fast or slow (±S/D). The speed of a mechanical pendulum clock is not constant, fluctuating with age and wear, spring tension and even temperature. The ClockMaster app was created with a focus on accurate long-term measurements where traditional timers often do not function very well. For the professional horologist or interested amateur, you can now test in the field — put the clock in exact beat and regulate the clock with just a few hours of testing. For increased rate accuracy and in depth investigation of clock movement's behavior, you can conduct long-term measurements for up to two weeks (ClockMaster Pro). Branded, printable PDF reports can be generated for each measurement, and the raw data exported as .csv file for graphing in a spreadsheet (ClockMaster Pro). ClockMaster Pro (in-app upgrade) provides these additional features: • Save and share branded, printable PDF reports for each measurement • Export raw measurement data as a .csv file for spreadsheet analysis • Conduct long-term measurements of up to two weeks

About

SlitherSense

Features
Read full description

The SlitherSense app is a utility app to: 1. Provide real-time information about sensor readings from your SlitherSense Sensors 2. Send those real-time readings to the cloud acting as a phone-as-a-gateway 3. Provide a means to transmit wifi credentials to the SlitherSense gateway so it can join your home wifi network.

Screenshots

ClockMaster4 screens
SlitherSense4 screens

Verdict

The call

The clearest difference is price: SlitherSense at Free against ClockMaster's $49.99. SlitherSense also leads on in-app purchases (none vs 1) and update cadence (every 2 months vs every 5 months). On ads 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

SlitherSense is free to download; ClockMaster costs $49.99 up front. ClockMaster sells 1 one-off in-app purchase. SlitherSense asks for nothing beyond the download.

UpkeepUpdate frequency

ClockMaster ships an update every 5 months, SlitherSense every 2 months. The most recent releases landed on October 29, 2026 and October 3, 2026 respectively.

Scorecard5 real differences · 5 level
ClockMaster versus SlitherSense: the parameters behind the verdict, then further details
ParameterClockMasterSlitherSense
Price$49.99Free — better
Rating3.8 (52 ratings) — better—
Positive reviews58.6% of reviews—
Number of ratings52 — better—
Update frequencyEvery 5 monthsEvery 2 months — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS18.012.1 — better
Further details — not scored
Size5 MB13 MB
Age rating4+4+
DeveloperONYX AppsSlitherSense LLC

Bugs and requests

ClockMaster

Reported bugs

6 issues
  • Data lost if app stops unexpectedly
  • iPhone notifications interrupt measurements
  • External mic option not available
  • App freezes after iOS upgrade
  • Screen touch points unresponsive
Show 1 more
  • Help section incomplete

Requested features

13 requests
  • Printable protocol like a timegrapher
  • Beat delta info on regulation screen
  • Option to manually restart measurement and append
  • Undocumented units in spreadsheet export
  • Include actual time in spreadsheet export
Show 8 more
  • Ability to set BPH to 480 for 400-day clocks
  • Plots for drift rate and periodic error within the app
  • Mic that works with the app
  • External mic option
  • More detailed graphs
  • Option to upgrade for $5 instead of $20
  • Better GUI and interface
  • Indication of which half of the cycle is longer/shorter

SlitherSense

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

ClockMaster

One-time1
  • ClockMaster Pro$29.99
None

SlitherSense

No in-app purchases

Questions

Is ClockMaster free?
ClockMaster costs $49.99, and also offers in-app purchases.
Is SlitherSense free?
SlitherSense is free to download, with no in-app purchases.
Do ClockMaster or SlitherSense have ads?
Neither ClockMaster nor SlitherSense shows ads.
Which is updated more often, ClockMaster or SlitherSense?
ClockMaster ships an update every 5 months, and SlitherSense every 2 months. Most recently, ClockMaster was updated on October 29, 2026 and SlitherSense on October 3, 2026.

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