Comparison

White Noise Plus 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

White Noise Plus

This utility app provides a variety of ambient sounds like white, brown, and pink noise to aid relaxation and sleep. It includes customizable features such as a sleep timer, volume fading, and theme options. Integration with Siri Shortcuts and widgets enhances user convenience.

Highlights
  • White, brown, and pink noise generation
  • Sleep timer
  • Wavy and fading volume control
  • Dark/light theme options
  • Siri Shortcuts support
  • Widget integration
Features
Read full description

A white, brown, and pink noise player focused on ease-of-use and a calm design. Most features are free - sleep timer - wavy volume - fading volume - dark/light theme - Siri Shortcuts support - widgets Premium unlocks: - nature, fire, and rain - more themes - nightlight

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

White Noise Plus3 screens
Harmonic Wave Equation Calc4 screens

Verdict

The call

The clearest difference is price: White Noise Plus at Free against Harmonic Wave Equation Calc's $2.99. White Noise Plus also leads on ratings volume (28 vs 1). Harmonic Wave Equation Calc's advantage is in-app purchases (none vs 1) and iOS requirement (13 vs 18.6). On rating, update cadence, ads 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

White Noise Plus is free to download; Harmonic Wave Equation Calc costs $2.99 up front. White Noise Plus sells 1 one-off in-app purchase. Harmonic Wave Equation Calc asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for White Noise Plus against 5.0 for Harmonic Wave Equation Calc. That said, the two scores are not equally well evidenced: White Noise Plus has 28 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

White Noise Plus ships an update every 15 months, Harmonic Wave Equation Calc every 31 months. The most recent releases landed on November 3, 2026 and November 2, 2026 respectively.

Scorecard5 real differences · 5 level
White Noise Plus versus Harmonic Wave Equation Calc: the parameters behind the verdict, then further details
ParameterWhite Noise PlusHarmonic Wave Equation Calc
PriceFree — better$2.99
Rating5.0 (28 ratings)5.0 (1 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings28 — better1
Update frequencyEvery 15 months — betterEvery 31 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS18.613 — better
Further details — not scored
Size12 MB1 MB
Age rating4+4+
DeveloperDavid AlbersNitrio

Customer experience

White Noise Plus

All ratings27 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews15 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Harmonic Wave Equation Calc

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

In-app purchases

1 purchases

White Noise Plus

One-time1
  • Premium$3.00
None

Harmonic Wave Equation Calc

No in-app purchases

Questions

Is White Noise Plus free?
White Noise Plus is free to download, with in-app purchases available.
Is Harmonic Wave Equation Calc free?
Harmonic Wave Equation Calc costs $2.99, with no in-app purchases.
Which has better reviews, White Noise Plus or Harmonic Wave Equation Calc?
Harmonic Wave Equation Calc is rated higher. White Noise Plus averages 5.0 out of 5 from 28 ratings, while Harmonic Wave Equation Calc averages 5.0 from 1 ratings.
Do White Noise Plus or Harmonic Wave Equation Calc have ads?
Neither White Noise Plus nor Harmonic Wave Equation Calc shows ads.
Which is updated more often, White Noise Plus or Harmonic Wave Equation Calc?
White Noise Plus ships an update every 15 months, and Harmonic Wave Equation Calc every 31 months. Most recently, White Noise Plus was updated on November 3, 2026 and Harmonic Wave Equation Calc on November 2, 2026.

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