PAcalculate vs GTRS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PAcalculate
This app provides 28 calculators and reference information for professional audio sound reinforcement and lighting. It covers acoustics, audio electronics, cabling, and lighting calculations, making it a valuable tool for audio and lighting professionals.
- 28 calculators for pro-audio and lighting
- Acoustics calculations (SPL, air absorption)
- Audio electronics calculations (dBu/dBV, Q/B/W)
- Cabling calculations (speaker cable loss)
- Lighting calculations (DMX, RGB/CMY)
- Reference info (pinouts, graphs)
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28 calculators (47 calculations) for pro-audio sound reinforcement and lighting, as well as reference info and utilities. A super handy tool for people dealing with PA, sound reinforcement, sound systems, electro-acoustics, pro-audio and lighting Acoustics - SPL (sound pressure level) - SPL sum with phase, distance or time difference - Air absorption attenuation for a given humidity, temperature, frequency and distance - Ceiling speaker coverage - Time «» Distance - Audio frequency «» Wavelength (includes lambda/2 and 2*lambda/3 for line arrays or subwoofer arrays) - Transition distance for line arrays (near to far field) - End-fire and broadside array subwoofer modelling Audio electronics - dBu «» dBV «» Volts - Q «» B/W (bandwidth) - Limiter threshold, attack&releases times - Amplifier gain Cabling - Speaker cable: low impedance, high impedance (constant voltage line, 70V/100V). Calculates energy and level loss, system damping factor Lights DMX channel, RGB/RGBW/RGBA and CMY Useful reference info such as pinouts (proaudio and lighting) and graphs Utilities: Inclinometer, Flashlight / light with selectable intermittence (uses camera permission) Latest news from DoctorProAudio.com
GTRS
Control your GTRS guitar hardware with this app. It offers real-time status updates, quick switching of over 110 effect models, and the ability to load different guitar sample files for varied tones. Features include a virtual footswitch, tuner, metronome, and cloud storage for your files.
- Low latency Bluetooth connectivity
- 110+ effect models
- Load custom guitar sample files
- Virtual footswitch
- Built-in tuner and metronome
- Cloud file upload/download
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GTRS iOS APP is a compatible mobile controlling App for GTRS guitars. Main features as below: 1. Low latency Bluetooth can connect with GTRS hardware system, showing GTRS guitar hardware working status in real time. 2. Fast switch over 110 effect models. 3. Load and change guitar sample files to experience different guitar tones from the same guitar. 4. Virtual footswitch can be used to change preset and switch on/off moduals like the physical footswitch does. 5. Easy operation with user-friendly quick guide 6. Included Tuner & Metronome. 7. Block chain orders can be changed easily. 8. Cloud system allows upload/download files.
Screenshots
Verdict
The clearest difference is review sentiment: PAcalculate at 100% against GTRS's 38%. PAcalculate also leads on rating (5.0 vs 2.9) and iOS requirement (13.0 vs 15.6). GTRS's advantage is update cadence (every 5 weeks vs every 4 months). On price, ratings volume, 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.
PAcalculate holds the better App Store score, 5.0 against 2.9. Both are backed by a comparable volume of ratings — 7 and 16 respectively. Written reviews point the same way: 100% of PAcalculate's written reviews are positive against 38% of GTRS's.
PAcalculate ships an update every 4 months, GTRS every 5 weeks. The most recent releases landed on October 1, 2026 and October 18, 2026 respectively.
| Parameter | PAcalculate | GTRS |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (7 ratings) — better | 2.9 (16 ratings) |
| Positive reviews | 100.0% of reviews — better | 37.5% of reviews |
| Number of ratings | 7 | 16 — better |
| Update frequency | Every 4 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 3 MB | 219 MB |
| Age rating | 4+ | 4+ |
| Developer | Jose Brusi | mooer |
Customer experience
PAcalculate
GTRS
In-app purchases
PAcalculate
No in-app purchases
GTRS
No in-app purchases
