Comparison

Building Acoustics Partner vs IsoCal

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

Head to head
About

Building Acoustics Partner

Features
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Together with HBK 2255 sound level meter, Building Acoustics Partner is a complete solution for sound insulation measurements. Building Acoustics Partner provides full workflow support for sound insulation testing according to national and international standards, including ISO 16283. Easy and intelligent measurement reuse helps to make your testing as efficient as possible, while instant result calculations and measurement quality indicators give you confidence in your data. Describe site conditions using photo, video, text and voice note annotations. Building Acoustics Partner is also prepared for the most challenging testing situations, with the ability to use serial measurement of individual 1/3 octave bands, markers to exclude unwanted sounds, and more.

About

IsoCal

This tool helps calculate the sound reduction index for various wall constructions, including single, double, and multi-leaf walls. It offers a catalog of materials and allows users to add their own for designing optimal soundproofing. The app also includes a calculator for predicting absorption coefficients of porous materials.

Highlights
  • Sound reduction index calculation
  • Single, double, and multi-leaf wall design
  • Material catalog and custom material input
  • Porous material absorption coefficient calculator
  • Cavity and boundary connection design
Features
Read full description

IsoCal is a prediction tool for calculating the sound reduction index of single walls with no cavity and double walls with a cavity between the leafs. It is possible to design walls with multiple leafs and different cavity/boundary connections (rigid connections, steel studs, staggered studs, etc.), different porous sound absorption material in the cavity of a double wall and predict the sound reduction index given as a Rw value in decibels [dB]. IsoCal comes built in with a catalog of well known material and porous material to use for designing the wall for optimal sound reduction. The user can also insert own materials in order to expand own personal database. IsoCal also provides a calculator for the prediction of absorption coefficients of porous materials. A simple calculator that lets the user choose the porous material thickness, air gap behind the porous material and more.

Screenshots

Building Acoustics Partner4 screens
IsoCal4 screens

Verdict

The call

The clearest difference is price: Building Acoustics Partner at Free against IsoCal's $14.99. On update cadence, 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

Building Acoustics Partner is free to download; IsoCal costs $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Building Acoustics Partner ships an update every 4 months, IsoCal every 2 months. The most recent releases landed on October 10, 2026 and October 7, 2026 respectively.

Scorecard1 real difference · 8 level
Building Acoustics Partner versus IsoCal: the parameters behind the verdict, then further details
ParameterBuilding Acoustics PartnerIsoCal
PriceFree — better$14.99
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 4 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.0 — better15.1
Further details — not scored
Size160 MB45 MB
Age rating4+4+
DeveloperHottinger Bruel & Kjaer A/SEmil Aerenlund

In-app purchases

None

Building Acoustics Partner

No in-app purchases

None

IsoCal

No in-app purchases

Questions

Is Building Acoustics Partner free?
Building Acoustics Partner is free to download, with no in-app purchases.
Is IsoCal free?
IsoCal costs $14.99, with no in-app purchases.
Do Building Acoustics Partner or IsoCal have ads?
Neither Building Acoustics Partner nor IsoCal shows ads.
Which is updated more often, Building Acoustics Partner or IsoCal?
Building Acoustics Partner ships an update every 4 months, and IsoCal every 2 months. Most recently, Building Acoustics Partner was updated on October 10, 2026 and IsoCal on October 7, 2026.

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