Comparison

Decibel X vs OnTrack

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

Head to head
About

Decibel X

This tool transforms your device into a professional sound level meter, offering precise measurements of ambient noise. It features advanced calibration, frequency analysis, and data management for various applications, from personal curiosity to professional use.

Highlights
  • Pre-calibrated sound pressure level (SPL) measurements
  • Frequency weighting filters (dBA, dBC, ITU-R 468)
  • Apple Watch and Health App integration
  • History data management with export options
  • Dosimeter with NIOSH, OSHA standards
  • FFT and BAR graphs for real-time frequency analysis
  • InstaDecibel for sharing dB reports on photos
Features
Currently charting
Read full description

"Decibel X" is one of very few noise meter apps on the market that has highly reliable, pre-calibrated measurements and supports dBA, dBC. It turns your iOS device into a professional sound level meter, precisely measures the sound pressure level (SPL) all around you. This extremely useful and beautiful tool will not only be a great tool for many uses but also bring you a lot of fun. Have you wondered how quiet is your room or how loud is a rock concert or sport event? "Decibel X" will help you answer all of those. WHAT MAKE IT GREAT AND STAND OUT FROM OTHER APPS: - Trusted accuracy: the app is tested and pre calibrated for all Apple devices. The precision is matching with real SPL devices - Apple Watch support: see noise level right from your wrist - Health App integration: export noise levels directly into Health app - Frequency weighting filters: ITU-R 468, A, B, C, Z - Powerful, smart history data management: + Recording data can be saved into a list of history records for future access and analysis + Each record can be exported as hi-res PNG graph or CSV text via sharing services + iCloud support which synchronize all history records across your Apple devices + Fullscreen mode to give overview the whole history of an record - Dosimeter with NIOSH, OSHA standards - Powerful calibration: Linear, Octave 1/1, 1/3, Load/save profile - FFT and BAR graphs to display real time FFT. Those are very useful for frequency analysis and musical tests. Real time predominant frequency is also displayed. - InstaDecibel to capture your dB report overlaid on photos and easily shared via popular social networks (Facebook, Instagram, Messages, etc.). - Support Live Activity, Dynamic Island - Support both Portrait and Landscape layouts - Beautiful, intuitive and carefully crafted UI design. Themes: LIGHT, DARK and CLASSIC OTHER GREAT FEATURES: - Standard time weightings (Response Time): SLOW (500 milliseconds), FAST (200 milliseconds) AND IMPULSE (50 milliseconds) - MIC Gain Offset from -50 dB to 50 dB - Standard measurement range from 30 dBA up to 130 dBA - HISTO graph for plotted history of the recorded values - WAVE graph with 2 display modes: Rolling & Buffer - SPECTROGRAPH - Real time scale level chart - Display Current, Average/Leq, and Max values with both nice and clear digital and analog layouts - Quick reference text to help you compare with real-life examples NOTES: - Please do not expect a quiet room reading will be 0 dBA. The range 30-130 dBA is the standard usable range and an average quiet room will be about 30 dBA. - Although all devices are pre-calibrated, custom calibration is suggested for serious purposes requiring higher precision and accuracy. You will need a real external device or calibrated sound meter as a reference, then adjust the trimming calibration until the reading matches with the reference. * Privacy Policy: http://www.skypaw.com/decibelx/privacy_policy.html * EULA: http://www.skypaw.com/decibelx/terms.html

About

OnTrack

Features
Read full description

Introducing Shift, an innovative app designed to make manual driving simpler and more efficient. By allowing you to set your desired RPM for gear changes, Shift provides a visual cue on your smartphone, making it easier than ever to know the perfect moment to shift gears. Ideal for both novice and experienced manual drivers, this app helps optimize your car's performance and fuel efficiency, while also making driving a more enjoyable experience. Features: Custom RPM Shift Point: You have the power to set the RPM at which you'd like to shift gears, tailoring the driving experience to your personal preference or to the specific demands of your vehicle. Bluetooth OBD Integration: Easily connect Shift to your car using a Bluetooth OBD II adapter, ensuring compatibility with a broad range of vehicles and a simple setup process. Intuitive Shift Light Display: Much like hardware Shift-Lights, but without the premium price. Quick and Easy Setup: Just connect the app to your car via the Bluetooth OBD II adapter, enter your preferred RPM shift point, and you're ready to go. How It Works: Pair your smartphone with your car through a Bluetooth OBD II adapter. Launch the Shift app and input your desired RPM for gear changes. Drive as usual and watch for the shift indicator on your phone for the perfect shift timing. Advantages: Improve your vehicle's performance and fuel efficiency. Customize your driving experience based on your skill level and car's capabilities. Compatibility: Compatible with most gasoline and diesel vehicles that have an OBD II port (1996 and newer). Requires the use of a Bluetooth 4 OBD II adapter (available separately). Get Shift now and take control of your driving experience. Set your RPM, see the shift, and feel the difference in your drive. Join the Shift community and redefine the way you engage with the road, one gear at a time. EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Decibel X4 screens
OnTrack4 screens

Verdict

The call

The clearest difference is update cadence: OnTrack at every 2 weeks against Decibel X's every 3 months. Decibel X's advantage is chart position (#204 vs unranked). On price, ads, in-app purchases and device support 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. Decibel X sells 5 in-app purchases, starting at $1.99 per 7 days and OnTrack sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Decibel X ships an update every 3 months, OnTrack every 2 weeks. The most recent releases landed on November 1, 2026 and October 29, 2026 respectively.

Scorecard2 real differences · 9 level
Decibel X versus OnTrack: the parameters behind the verdict, then further details
ParameterDecibel XOnTrack
PriceFreeFree
Rating4.6 (164K ratings) — better—
Positive reviews66.3% of reviews—
Number of ratings164K — better—
Update frequencyEvery 3 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
Best chart rank#204 — better—
DevicesiPhone, iPad, Apple WatchiPhone, iPad, Apple Watch
Requires iOS17.0 — better17.2
Further details — not scored
Size90 MB8 MB
Age rating4+4+
DeveloperSkyPaw Co., LimitedOnTrack Apps Limited

Bugs and requests

Decibel X

Reported bugs

3 issues
  • App crashes when deleting recordings
  • Microphone issues on certain devices
  • Saved files not accessible after updates

Requested features

5 requests
  • Add GPS coordinates to recordings
  • Improve reporting and data export
  • Provide more weighting options
  • Extend frequency range
  • Allow music playback while using the app

OnTrack

Not enough reviews yet to summarise bugs or requests.

In-app purchases

5 purchases

Decibel X

Subscriptions3
  • Weekly Membership$1.997 Days
  • Monthly Membership$5.991 Month
  • Annual Membership3 Days trial$49.991 Year
One-time2
  • ITU-R 468, A, B, C Weightings$1.99
  • Data Export$2.99
2 purchases

OnTrack

Subscriptions2
  • Monthly$1.991 Month
  • Yearly - Best value7 Days trial$19.991 Year

Questions

Is Decibel X free?
Decibel X is free to download, with in-app purchases available.
Is OnTrack free?
OnTrack is free to download, with in-app purchases available.
Do Decibel X or OnTrack have ads?
Neither Decibel X nor OnTrack shows ads.
Which is updated more often, Decibel X or OnTrack?
Decibel X ships an update every 3 months, and OnTrack every 2 weeks. Most recently, Decibel X was updated on November 1, 2026 and OnTrack on October 29, 2026.

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