Comparison

IsoDecibel vs amscan

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

Head to head
About

IsoDecibel

This tool simplifies decibel calculations, allowing you to add, subtract, and average sound source levels. It's designed for ease of use and to provide an educational insight into acoustics.

Highlights
  • Add independent source levels
  • Subtract independent source levels
  • Calculate average of source levels
  • Sum up to 20 source levels
  • Educational insight into acoustics
Features
Read full description

IsoDecibel is a simple and easy-to-use decibel calculator tool, for adding and subtracting independent source levels. IsoDecibel also provides the user with an option to calculate the average of source levels. The user has the ability to find the average and also the sum of up to 20 source levels. The calculator is designed to be easy-to-use, and also as an educational software that gives the user an insight into the field of Acoustics.

About

amscan

Visualize room modes in 3D using LiDAR scanning. Capture room geometry to instantly calculate acoustic modes, aiding in sound design and optimization for audiophiles and professionals. Offers free basic calculations with an in-app purchase for advanced modes.

Highlights
  • LiDAR room scanning
  • 3D room mode visualization
  • Automatic 3D model creation
  • Augmented Reality mode visualization
  • Basic acoustic data (RT60, Schroeder Freq, Volume)
  • Unlimited room scanning
Read full description

Acoustics just got easier. Scan your room with LiDAR, then see its room modes, simulate where a speaker could go, and export the geometry for your own simulation work. Part of the growing amcoustics-tools family, built on amroc THE room mode calculator. Capture your room's geometry once, and work from that one scan. It's a game-changer for anyone who has ever used the popular amroc and amroc pro calculators. For whom this app is for: audiophiles, home theater enthusiasts, home studio owners, and professional acousticians who want to see the acoustic behavior of a room in 3D without the hassle. Discuss listening positions, speaker placement, and absorber strategies while seeing the modal behavior of your room. A LiDAR-enabled iPhone or iPad is required to use scanning feature! How it works: 1. Open the app and scan your room with your device's Lidar sensor. 2. The app automatically creates a 3D model. 3. You can calculate the first 5 room modes for free. 4. From there, choose what you want to do with the room: see all relevant modes, run a speaker placement simulation, or export the geometry. 5. Each of those is an in-app purchase, calculated once for that room. What's included: - Free to Download: The app is completely free to install. No upfront charges, no login. Just install and use. - Unlimited Scanning: Scan as many rooms as you like. - 5 Free Room Modes: Instantly calculate and visualize your first five modes for every room you scan. - Basic Acoustic Data: Reverberation time estimate, Schroeder frequency, and room volume. - All Room Modes: Use the in-app purchase to get all relevant modes, up to roughly the Schroeder frequency. Sweep through the frequency range and play the selected mode through your speakers, so you can hear the resonance while you see it. - AR Preview: Place the scanned room and its modal pattern in front of you through the camera, and walk around the model. - Speaker Placement: Set your listening position, and the room is simulated from there. You get a map of how even the response would be at every point in the room, and you can place up to two speaker positions and compare their frequency response curves side by side. - Export Simulation Geometry: Download a low-polygon, closed, watertight and manifold mesh in OBJ, STL, DXF, STEP or DWG. This allows you to perform any type of simulation you desire later, in the software you already use. About the speaker placement: This is a simulation, not a measurement. It is calculated from the geometry we scanned, so it will not match a microphone in your room exactly. Use it to understand how your room behaves at low frequencies. Decide where to start from, then trust your ears. amscan transforms complex acoustic calculations into a simple, visual, and intuitive process. Stop guessing and start designing your sound. Privacy Policy: https://amcoustics.com/privacy Terms and Conditions: https://amcoustics.com/terms

Screenshots

IsoDecibel4 screens
amscan4 screens

Verdict

The call

The clearest difference is rating: IsoDecibel at 5.0 against amscan's 4.0. IsoDecibel also leads on in-app purchases (none vs 2) and iOS requirement (13.0 vs 18.6). amscan's advantage is update cadence (every 11 days vs every 9 months). On price, ratings volume, 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. amscan sells 2 one-off in-app purchases. IsoDecibel asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

IsoDecibel holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

UpkeepUpdate frequency

IsoDecibel ships an update every 9 months, amscan every 11 days. The most recent releases landed on October 7, 2026 and October 9, 2026 respectively.

Scorecard5 real differences · 5 level
IsoDecibel versus amscan: the parameters behind the verdict, then further details
ParameterIsoDecibelamscan
PriceFreeFree
Rating5.0 (1 ratings) — better4.0 (2 ratings)
Positive reviews—50.0% of reviews
Number of ratings12 — better
Update frequencyEvery 9 monthsEvery 11 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better18.6
Further details — not scored
Size10 MB20 MB
Age rating4+4+
DeveloperEmil AerenlundDariush Majidi

Customer experience

IsoDecibel

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

amscan

All ratings2 ratings
Positive50.0%
Neutral50.0%
Negative0.0%
Written reviews2 reviews
Positive50.0%
Neutral50.0%
Negative0.0%

In-app purchases

None

IsoDecibel

No in-app purchases

2 purchases

amscan

One-time2
  • Simulation Geometry$3.99
  • Additional Room Modes$6.99

Questions

Is IsoDecibel free?
IsoDecibel is free to download, with no in-app purchases.
Is amscan free?
amscan is free to download, with in-app purchases available.
Which has better reviews, IsoDecibel or amscan?
IsoDecibel is rated higher. IsoDecibel averages 5.0 out of 5 from 1 ratings, while amscan averages 4.0 from 2 ratings.
Do IsoDecibel or amscan have ads?
Neither IsoDecibel nor amscan shows ads.
Which is updated more often, IsoDecibel or amscan?
IsoDecibel ships an update every 9 months, and amscan every 11 days. Most recently, IsoDecibel was updated on October 7, 2026 and amscan on October 9, 2026.

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