Comparison

VHF 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

VHF

This marine radio simulator allows users to practice sending various distress and routine messages. It supports communication between multiple devices and includes an auto-distress function for emergencies. A help section is available within the app for guidance.

Highlights
  • VHF-DSC radio simulation
  • Send Mayday, Pan Pan, Security, and Routine messages
  • Inter-device communication
  • Auto-distress function
  • Practice marine radio operator skills
  • Help section available
Features
Read full description

With your VHF-DSC radio simulator, you can improve your marine Radio operator skills.  Multiple functions are now available, including communication between two or more devices: select a Waterplace from the settings menu and send DSC Routine messages. With VHF-DSC, you can train to send Mayday, Pan Pan, Security or Routine messages. RT (Radio communication) will work effectively as receiving real messages like Distress alert (mayday) or call. There is also the auto Distress function, to send a Mayday alert by holding buttons for 5 seconds. A new help page is available by opening the app menu (three parallel line symbol top right corner of the app) and clicking on the help menu item.

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

VHF4 screens
Harmonic Wave Equation Calc4 screens

Verdict

The call

The clearest difference is price: Harmonic Wave Equation Calc at $2.99 against VHF's $9.99. VHF's advantage is update cadence (every 4 weeks vs every 31 months). On ads, in-app purchases, monetization model 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

VHF costs $9.99 and Harmonic Wave Equation Calc $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

VHF ships an update every 4 weeks, Harmonic Wave Equation Calc every 31 months. The most recent releases landed on November 3, 2026 and November 2, 2026 respectively.

Scorecard2 real differences · 8 level
VHF versus Harmonic Wave Equation Calc: the parameters behind the verdict, then further details
ParameterVHFHarmonic Wave Equation Calc
Price$9.99$2.99 — better
Rating—5.0 (1 ratings) — better
Positive reviews0.0% of reviews—
Number of ratings—1 — better
Update frequencyEvery 4 weeks — betterEvery 31 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.2 — better13
Further details — not scored
Size101 MB1 MB
Age rating4+4+
DeveloperRichard JaquemetNitrio

Customer experience

VHF

Written reviews10 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Harmonic Wave Equation Calc

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

In-app purchases

None

VHF

No in-app purchases

None

Harmonic Wave Equation Calc

No in-app purchases

Questions

Is VHF free?
VHF costs $9.99, with no in-app purchases.
Is Harmonic Wave Equation Calc free?
Harmonic Wave Equation Calc costs $2.99, with no in-app purchases.
Do VHF or Harmonic Wave Equation Calc have ads?
Neither VHF nor Harmonic Wave Equation Calc shows ads.
Which is updated more often, VHF or Harmonic Wave Equation Calc?
VHF ships an update every 4 weeks, and Harmonic Wave Equation Calc every 31 months. Most recently, VHF was updated on November 3, 2026 and Harmonic Wave Equation Calc on November 2, 2026.

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