Comparison

Sub System vs GCP

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

Head to head
About

Sub System

This app allows audio engineers and sound designers to visualize sound pressure levels and their interactions. Users can place virtual speakers and microphones, manipulate them with touch gestures, and observe colorful graphs of SPL and frequency response to understand acoustical summation.

Highlights
  • Virtual speaker placement
  • Sound pressure level visualization
  • Frequency response graphs
  • Virtual microphone simulation
  • Touch-based manipulation
  • Acoustical summation understanding
Features
Read full description

An app for audio engineers and sound designers. It will let the user place virtual speakers around and see the sound pressure levels that they produce, including the interactions between sources. Colorful graphs for SPL. Frequency response based on virtual microphones. Speakers and Mics are moved around using touch functions. Zoom in, out. All graphics are touchable. Best use is to understand how acoustical summation is produced.

About

GCP

Features
Read full description

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Screenshots

Sub System4 screens
GCP3 screens

Verdict

The call

The clearest difference is price: GCP at Free against Sub System's $30.00. Sub System's advantage is update cadence (every 10 days vs every 3 months) and iOS requirement (13.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

GCP is free to download; Sub System costs $30.00 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Sub System ships an update every 10 days, GCP every 3 months. The most recent releases landed on October 7, 2026 and September 28, 2026 respectively.

Scorecard3 real differences ยท 5 level
Sub System versus GCP: the parameters behind the verdict, then further details
ParameterSub SystemGCP
Price$30.00Free โ€” better
Positive reviews100.0% of reviewsโ€”
Update frequencyEvery 10 days โ€” betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidโ€”
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 โ€” better15.0
Further details โ€” not scored
Size48 MB30 MB
Age rating4+4+
Developersebastian rivasDavy Raitt

In-app purchases

None

Sub System

No in-app purchases

None

GCP

No in-app purchases

Questions

Is Sub System free?
Sub System costs $30.00, with no in-app purchases.
Is GCP free?
GCP is free to download, with no in-app purchases.
Do Sub System or GCP have ads?
Neither Sub System nor GCP shows ads.
Which is updated more often, Sub System or GCP?
Sub System ships an update every 10 days, and GCP every 3 months. Most recently, Sub System was updated on October 7, 2026 and GCP on September 28, 2026.

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