VHF vs Harmonic Wave Equation Calc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
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.
- Instant wave calculations
- Copyable results
- Included reference formulas
- Supports 16 decimal places
- Multiple unit support
- Ad-free and private
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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
Verdict
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
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.
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.
| Parameter | VHF | Harmonic Wave Equation Calc |
|---|---|---|
| Price | $9.99 | $2.99 — better |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | — | 1 — better |
| Update frequency | Every 4 weeks — better | Every 31 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.2 — better | 13 |
| Further details — not scored | ||
| Size | 101 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Richard Jaquemet | Nitrio |
Customer experience
VHF
Harmonic Wave Equation Calc
In-app purchases
VHF
No in-app purchases
Harmonic Wave Equation Calc
No in-app purchases
Questions
Is VHF free?
Is Harmonic Wave Equation Calc free?
Do VHF or Harmonic Wave Equation Calc have ads?
Which is updated more often, VHF or Harmonic Wave Equation Calc?
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