V3 SOUND CONTROL vs CalcKX
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
V3 SOUND CONTROL
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This app lets you control sounds, parameters, and settings on your V3 Sound expanders, including the new Pro Line Sound Expander and XXL models. Select sounds, change parameters such as volume, reverb and many other parameters, and save everything in a Registration. You can save 300 Registrations, overlay and split up to 6 sounds on one MIDI channel. Hardware requirement: The app only works in conjunction with the optional hardware "V3-SOUND-CONTROL", a Bluetooth receiver in the form of a USB stick. Connection: The app sends the parameters via Bluetooth from the tablet to the Bluetooth receiver, which is connected to the USB port of the V3 Sound Expander. The MIDI keyboard is connected to the V3 Sound Expander using a standard MIDI cable.
CalcKX
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FREE - NO ADVERTISING An easy to use basic calculator for iPhone and iPad with separate display area for calculations. Special gimmick: have fun while looking for Easter Eggs!
Screenshots
Verdict
The clearest difference is update cadence: CalcKX at every 4 days against V3 SOUND CONTROL's every 2 months. CalcKX also leads on device support (3 vs 1). V3 SOUND CONTROL's advantage is iOS requirement (12.2 vs 14.1). On price, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
V3 SOUND CONTROL ships an update every 2 months, CalcKX every 4 days. The most recent releases landed on September 14, 2026 and September 13, 2026 respectively.
| Parameter | V3 SOUND CONTROL | CalcKX |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 12.2 — better | 14.1 |
| Further details — not scored | ||
| Size | 50 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | V3SOUND GmbH | Martin Kowollik |
In-app purchases
V3 SOUND CONTROL
No in-app purchases
CalcKX
No in-app purchases
Questions
Is V3 SOUND CONTROL free?
Is CalcKX free?
Do V3 SOUND CONTROL or CalcKX have ads?
Which is updated more often, V3 SOUND CONTROL or CalcKX?
Other comparisons
