Comparison

PAcalculate vs Harmonic Wave Equation Calc

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

Head to head
About

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.

Highlights
  • 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)
Features
Read full description

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

About

Harmonic Wave Equation Calc

This physics and math calculator quickly determines wave properties like displacement, velocity, and amplitude. It provides instant calculations with copyable results and includes reference formulas. Optimized for everyday use, it supports high precision and various units.

Highlights
  • Instant wave calculations
  • Copyable results
  • Included reference formulas
  • Supports 16 decimal places
  • Multiple unit support
  • Ad-free and private
Features
Read full description

Harmonic Wave Equation Calculator is a physics/math calculator used to find the displacement of a given point along the wave, the position of that point, the time point, wave velocity, wavelength, amplitude, or initial phase of the wave quickly and easily. Features: - Instant calculation. - Results are copyable to other apps. - Formulas are included as references. - Supports up to 16 decimal places. - Supports various units for each input. - Works seamlessly on both iPhone and iPad. - Lightweight, compact app optimized for everyday use. - Ad-free and built with privacy in mind. A harmonic of such a wave is a wave with a frequency that is a positive integer multiple of the frequency of the original wave, known as the fundamental frequency. The original wave is also called the 1st harmonic; the following harmonics are known as higher harmonics. Formula: y = A * sin[(2π / λ) * (x - vt) + Φ] where: y - displacement of a given point along the wave x - position of that point (its distance from the source) t - time point v - wave velocity λ - wavelength A - amplitude Φ - initial phase of the wave Thank you for your support, and feel free to visit nitrio.com for more apps for your iOS devices.

Screenshots

PAcalculate4 screens
Harmonic Wave Equation Calc4 screens

Verdict

The call

The clearest difference is price: PAcalculate at Free against Harmonic Wave Equation Calc's $2.99. PAcalculate also leads on update cadence (every 4 months vs every 31 months) and ratings volume (7 vs 1). On rating, 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

PAcalculate is free to download; Harmonic Wave Equation Calc costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for PAcalculate against 5.0 for Harmonic Wave Equation Calc. That said, the two scores are not equally well evidenced: PAcalculate has 7 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

PAcalculate ships an update every 4 months, Harmonic Wave Equation Calc every 31 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

Scorecard4 real differences · 6 level
PAcalculate versus Harmonic Wave Equation Calc: the parameters behind the verdict, then further details
ParameterPAcalculateHarmonic Wave Equation Calc
PriceFree — better$2.99
Rating5.0 (7 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews—
Number of ratings7 — better1
Update frequencyEvery 4 months — betterEvery 31 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.013
Further details — not scored
Size3 MB1 MB
Age rating4+4+
DeveloperJose BrusiNitrio

Customer experience

PAcalculate

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Harmonic Wave Equation Calc

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

In-app purchases

None

PAcalculate

No in-app purchases

None

Harmonic Wave Equation Calc

No in-app purchases

Questions

Is PAcalculate free?
PAcalculate is free to download, with no in-app purchases.
Is Harmonic Wave Equation Calc free?
Harmonic Wave Equation Calc costs $2.99, with no in-app purchases.
Which has better reviews, PAcalculate or Harmonic Wave Equation Calc?
PAcalculate and Harmonic Wave Equation Calc are both rated 5.0 out of 5 on the App Store, from 7 and 1 ratings respectively.
Do PAcalculate or Harmonic Wave Equation Calc have ads?
Neither PAcalculate nor Harmonic Wave Equation Calc shows ads.
Which is updated more often, PAcalculate or Harmonic Wave Equation Calc?
PAcalculate ships an update every 4 months, and Harmonic Wave Equation Calc every 31 months. Most recently, PAcalculate was updated on November 1, 2026 and Harmonic Wave Equation Calc on November 2, 2026.

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