Comparison

Decibel X vs OpenSpace Parking

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
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

OpenSpace Parking

Instantly check real-time parking space availability at various locations. View available spots, distances, and navigate directly using Google Maps. Smart color-coding helps you quickly identify parking lot occupancy levels.

Highlights
  • Real-time space availability
  • Distance from current location
  • Map view of locations
  • Google Maps navigation integration
  • Smart color-coding for occupancy
  • Search by provider name
Features
Read full description

TheOpenSpace Parking mobile app connects your mobile device instantly to the cloud so you can check real-time space availability by parking location. Navigation with ease On the app home screen, you'll find a list of all available parking spaces at your facilities. Your Home screen not only displays the number of available parking spaces in a location, but also the distance from your current location, and the location on the map. Need directions? Just tap Route to open the location on Google Maps. You can also search for the name of a provider from the homescreen. Homescreen Lists the number of available parking spaces in the parking location and the distance from your current location. Tap to view total spaces, available spaces, and the map view of the location. Tap Route to open the location on Google Maps and to obtain directions. You can edit the location name as required. Smart color coding We've madeit eveneasier to spot available parking spaces with our smart color-coding system. The Available Spaces totals display in Green, Yellow, or Red, with the percentage of availability per color code configurable by your provider. For example, green would typically indicate the parking location has plenty of space. Yellow typically would indicate the parking lot has significant occupancy, and Red, would mean that there are very few remaining spaces. Location full? Whenalocation is full or nearly full, the app reflects the current status, ensuring you never waste time searching for a spot that doesn't exist

Screenshots

Decibel X4 screens
OpenSpace Parking4 screens

Verdict

The call

The clearest difference is review sentiment: Decibel X at 66% against OpenSpace Parking's 0%. Decibel X also leads on rating (4.6 vs 1.0) and ratings volume (164K vs 4). OpenSpace Parking's advantage is in-app purchases (none vs 5) and iOS requirement (15.1 vs 17.0). On price, update cadence, ads 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. OpenSpace Parking asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Decibel X holds the better App Store score, 4.6 against 1.0. That said, the two scores are not equally well evidenced: Decibel X has 164K ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 66% of Decibel X's written reviews are positive against 0% of OpenSpace Parking's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on November 8, 2026 and October 30, 2026 respectively.

Scorecard6 real differences · 4 level
Decibel X versus OpenSpace Parking: the parameters behind the verdict, then further details
ParameterDecibel XOpenSpace Parking
PriceFreeFree
Rating4.6 (164K ratings) — better1.0 (4 ratings)
Positive reviews66.3% of reviews — better0.0% of reviews
Number of ratings164K — better4
Update frequencyEvery 3 monthsEvery 3 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS17.015.1 — better
Further details — not scored
Size90 MB55 MB
Age rating4+4+
DeveloperSkyPaw Co., LimitedLogixITS

Customer experience

Decibel X

All ratings163,488 ratings
Positive92.2%
Neutral3.5%
Negative4.3%
Written reviews1,925 reviews
Positive66.3%
Neutral5.5%
Negative28.2%

OpenSpace Parking

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

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

OpenSpace Parking

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
None

OpenSpace Parking

No in-app purchases

Questions

Is Decibel X free?
Decibel X is free to download, with in-app purchases available.
Is OpenSpace Parking free?
OpenSpace Parking is free to download, with no in-app purchases.
Which has better reviews, Decibel X or OpenSpace Parking?
Decibel X is rated higher. Decibel X averages 4.6 out of 5 from 164K ratings, while OpenSpace Parking averages 1.0 from 4 ratings.
Do Decibel X or OpenSpace Parking have ads?
Neither Decibel X nor OpenSpace Parking shows ads.
Which is updated more often, Decibel X or OpenSpace Parking?
Decibel X ships an update every 3 months, and OpenSpace Parking every 3 months. Most recently, Decibel X was updated on November 8, 2026 and OpenSpace Parking on October 30, 2026.

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