Bolt Reader® vs Decibel Meter Ultra
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Bolt Reader®
This application provides users with real-time bolt tension data through intuitive bar graphs. It is specifically designed to work with Bolt-Cap Module devices from Transmission Dynamics, helping users quickly identify screws needing attention.
- Real-time bolt tension information
- Bar graph data visualization
- Identify screws requiring attention
- Designed for Bolt-Cap Module devices
- Works with Transmission Dynamics hardware
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Thanks to the innovative undertaking of creating the Bolt Reader® application, users have constant access to information on bolt tension. Information is presented in the form of bar graphs, which allows you to quickly spot screws that require attention. This application is specifically designed for Bolt-Cap Module devices produced by Transmission Dynamics. Transmission Dynamics; Redefining the Status Quo
Decibel Meter Ultra
Measure, record, and analyze sound levels in your environment. This app offers precision metering, noise elimination tools, hearing protection features, and home audio calibration. It provides detailed reports and can be used with device microphones or external ones.
- Precision sound level metering
- Noise logging and reporting
- Hearing protection dosimeter
- Fractional octave band analysis
- Real-time analyzer
- External microphone support
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Measure, record and track sound levels in your environment with Decibel Meter Ultra, the all-in-one sound level meter, dosimeter and real-time analyzer. From monitoring sound levels at home, noise levels in the workplace, to calibrating the speakers of your hi-fi, Decibel Meter Ultra makes it easy to get the information that you need. Precision Metering For Sound: Get accurate sound level readings using industry standard measurement methodologies, selectable A, C and Z frequency weighting curves, fast and slow time-weightings, plus concurrent peak level measurement. Choose from the built-in microphones on your device or connect an external microphone* for an even broader dynamic range. Eliminate Nuisance Noise: Getting proof is as simple as tapping a button. Catch and log problem noise as it occurs. Overlay live video with sound levels, or create comprehensive acoustic analysis reports that you can share easily via PDF. Visualize sound levels over time and gather the evidence that you need to take decisive action. Safeguard Your Hearing: Stay aware of noise levels in the workplace and compare against industry-mandated safe levels using the built-in dosimeter. Select from default measurement profiles based on published recommendations from NIOSH and OSHA, or if you’re working against a different specification, create your own. Elevate Your Home Audio: Get the best from your home audio system with powerful fractional octave band analysis. Fine-tune your equipment using up to twelfth octave-band resolution, variable time weightings and peak level indicators so that you can enjoy music and movies like never before. Download now and take advantage of our free plan which includes our built-in metering profile and up to two-minute recording durations. Or choose one of our PRO plans and gain access to everything the app has to offer, including our full suite of professional metering options, custom meter profiles, analysis charts, PDF reports, background recording, unlimited recording durations and more. *External microphones require calibration against a reference sound level source The data provided by Decibel Meter Ultra is for educational and informational purposes only. Please refer to the disclaimer in the Terms of Use for further information. Terms of Use: https://decibelmeterultra.com/terms Privacy Policy: https://decibelmeterultra.com/privacy
Screenshots
Verdict
The clearest difference is monetization model: Bolt Reader® at free against Decibel Meter Ultra's free with in-app purchases. Bolt Reader® also leads on device support (3 vs 1) and iOS requirement (14.0 vs 18.6). Decibel Meter Ultra's advantage is ratings volume (2.5K vs 7) and update cadence (every 10 days vs every 5 weeks). On price, rating, ads and in-app purchases 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
Both are free to download. Bolt Reader® sells 1 one-off in-app purchase and Decibel Meter Ultra sells 4 in-app purchases, starting at $7.99 per 7 days. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.7 for Bolt Reader® against 4.6 for Decibel Meter Ultra. That said, the two scores are not equally well evidenced: Decibel Meter Ultra has 2.5K ratings behind it against 7, so its average is the more settled of the two.
Bolt Reader® ships an update every 5 weeks, Decibel Meter Ultra every 10 days. The most recent releases landed on October 20, 2026 and October 19, 2026 respectively.
| Parameter | Bolt Reader® | Decibel Meter Ultra |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (7 ratings) — better | 4.6 (2.5K ratings) |
| Positive reviews | — | 48.1% of reviews |
| Number of ratings | 7 | 2.5K — better |
| Update frequency | Every 5 weeks | Every 10 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 14.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 24 MB | 91 MB |
| Age rating | 4+ | 12+ |
| Developer | Transmission Dynamics | Ultrafine |
Customer experience
Bolt Reader®
Decibel Meter Ultra
Bugs and requests
Bolt Reader®
Not enough reviews yet to summarise bugs or requests.
Decibel Meter Ultra
Reported bugs
2 issues- Subscription charges continue after cancellation
- Subscription cancellation page doesn't load
Requested features
2 requests- Lower subscription pricing
- Improve subscription cancellation process
In-app purchases
Bolt Reader®
- Full version$49.99
Decibel Meter Ultra
- PRO Access7 Days trial2 variants$7.997 Days
- PRO Access2 variants$11.991 Month
- PRO Access3 Days trial$39.991 Year
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- PRO Access2 variants$39.991 Year
Questions
Is Bolt Reader® free?
Is Decibel Meter Ultra free?
Which has better reviews, Bolt Reader® or Decibel Meter Ultra?
Do Bolt Reader® or Decibel Meter Ultra have ads?
Which is updated more often, Bolt Reader® or Decibel Meter Ultra?
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