Comparison

Bolt Reader® vs Decibel Meter Ultra

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

Head to head
About

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.

Highlights
  • Real-time bolt tension information
  • Bar graph data visualization
  • Identify screws requiring attention
  • Designed for Bolt-Cap Module devices
  • Works with Transmission Dynamics hardware
Features
Read full description

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

About

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.

Highlights
  • Precision sound level metering
  • Noise logging and reporting
  • Hearing protection dosimeter
  • Fractional octave band analysis
  • Real-time analyzer
  • External microphone support
Read full description

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

Bolt Reader®4 screens
Decibel Meter Ultra4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard5 real differences · 5 level
Bolt Reader® versus Decibel Meter Ultra: the parameters behind the verdict, then further details
ParameterBolt Reader®Decibel Meter Ultra
PriceFreeFree
Rating4.7 (7 ratings) — better4.6 (2.5K ratings)
Positive reviews—48.1% of reviews
Number of ratings72.5K — better
Update frequencyEvery 5 weeksEvery 10 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS14.0 — better18.6
Further details — not scored
Size24 MB91 MB
Age rating4+12+
DeveloperTransmission DynamicsUltrafine

Customer experience

Bolt Reader®

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Decibel Meter Ultra

All ratings2,528 ratings
Positive91.2%
Neutral3.1%
Negative5.7%
Written reviews81 reviews
Positive48.1%
Neutral2.5%
Negative49.4%

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

1 purchases

Bolt Reader®

One-time1
  • Full version$49.99
4 purchases

Decibel Meter Ultra

Subscriptions4
  • PRO Access7 Days trial2 variants$7.997 Days
  • PRO Access2 variants$11.991 Month
  • PRO Access3 Days trial$39.991 Year
Show 1 more
  • PRO Access2 variants$39.991 Year

Questions

Is Bolt Reader® free?
Bolt Reader® is free to download, with in-app purchases available.
Is Decibel Meter Ultra free?
Decibel Meter Ultra is free to download, with in-app purchases available.
Which has better reviews, Bolt Reader® or Decibel Meter Ultra?
Bolt Reader® is rated higher. Bolt Reader® averages 4.7 out of 5 from 7 ratings, while Decibel Meter Ultra averages 4.6 from 2.5K ratings.
Do Bolt Reader® or Decibel Meter Ultra have ads?
Neither Bolt Reader® nor Decibel Meter Ultra shows ads.
Which is updated more often, Bolt Reader® or Decibel Meter Ultra?
Bolt Reader® ships an update every 5 weeks, and Decibel Meter Ultra every 10 days. Most recently, Bolt Reader® was updated on October 20, 2026 and Decibel Meter Ultra on October 19, 2026.

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