ClockMaster vs PowerSpot
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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)
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>>> 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
PowerSpot
Monitor the wireless charging status of compatible devices, including a unique rechargeable grip for game controllers. Set charging schedules and track power transmission from a wireless power transmitter.
- Monitor wireless charging status
- Track Powercast-enabled devices
- Control Wireless Charging Grip
- Schedule transmitter dormancy
- View over-the-air recharging
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The PowerSpot app is your hub for monitoring the wireless charging status of your Wireless Charging Grip and other Powercast-enabled devices. Simply place your enabled device in front of a PowerSpot RF wireless power transmitter and monitor its status using this app. WIRELESS CHARGING GRIP Use this app to monitor your Wireless Charging Grip – the world’s first completely wirelessly rechargeable device! Simply click in your Joy Con controllers, then set it & forget it in front of your PowerSpot transmitter for over-the-air wireless recharging. Your Joy Cons recharge from the battery embedded in the Grip, which can also be used as a backup battery pack for extended game play. Get yours on Amazon today! https://www.powercastco.com/grips/ TRUE WIRELESS POWER Powercast is leading the world in real, long-distance wireless power solutions. Pair this app with your Powercast enabled, wirelessly rechargeable devices to monitor completely wireless battery recharging of your Wireless Charging Grip and other Powercast-enabled devices. Additionally, use the schedule feature to set periods of dormancy for your PowerSpot transmitter. THE POWERSPOT WIRELESS POWER TRANSMITTER The PowerSpot Transmitter from Powercast provides a reliable source of wireless energy to send power over a distance to devices equipped with Powerharvester® receivers by broadcasting radio waves in the unlicensed 915MHz ISM band for remote power and data. https://www.powercastco.com/products/powerspot/ ABOUT THE DEVELOPMENT TOOLS The P1110-EVAL-PS PowerSpot RF Wireless Power Development Kit for Battery Recharging is a complete development solution for the PowerSpot transmitter to demonstrate its’ battery recharging capabilities and BLE communications protocols. Learn more about the P1110-EVAL-PS here: https://www.powercastco.com/products/development-kits/#EVAL-PS
Screenshots
Verdict
The clearest difference is price: PowerSpot at Free against ClockMaster's $49.99. PowerSpot also leads on rating (5.0 vs 3.8) and in-app purchases (none vs 1). ClockMaster's advantage is ratings volume (52 vs 1) and update cadence (every 5 months vs every 12 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
PowerSpot is free to download; ClockMaster costs $49.99 up front. ClockMaster sells 1 one-off in-app purchase. PowerSpot asks for nothing beyond the download.
PowerSpot 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 1, so its average is the more settled of the two.
ClockMaster ships an update every 5 months, PowerSpot every 12 months. The most recent releases landed on October 12, 2026 and September 30, 2026 respectively.
| Parameter | ClockMaster | PowerSpot |
|---|---|---|
| Price | $49.99 | Free — better |
| Rating | 3.8 (52 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 58.6% of reviews | — |
| Number of ratings | 52 — better | 1 |
| Update frequency | Every 5 months — better | Every 12 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 18.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | ONYX Apps | Powercast |
Customer experience
ClockMaster
PowerSpot
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
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- 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 moreShow fewer
- 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
PowerSpot
Not enough reviews yet to summarise bugs or requests.
In-app purchases
ClockMaster
- ClockMaster Pro$29.99
PowerSpot
No in-app purchases
Questions
Is ClockMaster free?
Is PowerSpot free?
Which has better reviews, ClockMaster or PowerSpot?
Do ClockMaster or PowerSpot have ads?
Which is updated more often, ClockMaster or PowerSpot?
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