Comparison

ClockMaster vs tvastm

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

tvastm

Easily access and listen to daily radio podcasts produced by radio MHCG. This application simplifies the selection and playback of available audio content.

Highlights
  • Listen to daily radio podcasts
  • Select available audio content
  • Produced by radio MHCG
  • Easy to use interface
Features
Read full description

This app makes it much easier for users to select and listen to all the available daily radio podcasts produced by radio MHCG.

Screenshots

ClockMaster4 screens
tvastm4 screens

Verdict

The call

The clearest difference is price: tvastm at Free against ClockMaster's $49.99. tvastm also leads on rating (5.0 vs 3.8) and in-app purchases (none vs 1). ClockMaster's advantage is ratings volume (52 vs 7). 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

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

ReceptionRating · Positive reviews · Number of ratings

tvastm holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: ClockMaster has 52 ratings behind it against 7, so its average is the more settled of the two.

UpkeepUpdate frequency

ClockMaster ships an update every 5 months, tvastm monthly. The most recent releases landed on September 25, 2026 and June 5, 2026 respectively.

Scorecard8 real differences · 2 level
ClockMaster versus tvastm: the parameters behind the verdict, then further details
ParameterClockMastertvastm
Price$49.99Free — better
Rating3.8 (52 ratings)5.0 (7 ratings) — better
Positive reviews58.6% of reviews—
Number of ratings52 — better7
Update frequencyEvery 5 monthsMonthly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS18.015.6 — better
Further details — not scored
Size5 MB6 MB
Age rating4+4+
DeveloperONYX AppsThe Vietnamese Redemptorist Mission Corporation

Customer experience

ClockMaster

All ratings52 ratings
Positive71.2%
Neutral5.8%
Negative23.1%
Written reviews70 reviews
Positive58.6%
Neutral5.7%
Negative35.7%

tvastm

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

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

tvastm

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

ClockMaster

One-time1
  • ClockMaster Pro$29.99
None

tvastm

No in-app purchases

Questions

Is ClockMaster free?
ClockMaster costs $49.99, and also offers in-app purchases.
Is tvastm free?
tvastm is free to download, with no in-app purchases.
Which has better reviews, ClockMaster or tvastm?
tvastm is rated higher. ClockMaster averages 3.8 out of 5 from 52 ratings, while tvastm averages 5.0 from 7 ratings.
Do ClockMaster or tvastm have ads?
Neither ClockMaster nor tvastm shows ads.
Which is updated more often, ClockMaster or tvastm?
ClockMaster ships an update every 5 months, and tvastm monthly. Most recently, ClockMaster was updated on September 25, 2026 and tvastm on June 5, 2026.

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