Comparison

Wavelength Calculator vs ProPi System Analyzer

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

Head to head
About

Wavelength Calculator

This physics and math tool quickly calculates wave properties like wavelength and frequency. It supports various units, high precision, and allows results to be copied to other applications. The app is lightweight, ad-free, and designed with privacy in mind.

Highlights
  • Instant calculations
  • Copyable results
  • Included formulas
  • High precision (16 decimal places)
  • Multiple unit support
  • Ad-free and private
Features
Read full description

Wavelength Calculator is a physics/math calculator to find wavelength and frequency fast and easy. Features: - Instant calculation. - Results are copyable to other apps. - Formulas are included as reference. - 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. There are three main properties of a wave: velocity, wavelength, and frequency. [v] Wave velocity is the measure of how fast a wave propagates in a given medium. Its unit is meters per second. [λ] Wavelength is the distance over which the shape of the wave repeats. It depends on the medium through which the wave travels. [f] Frequency of a wave refers to how many times (per a given time period) the particles of a medium vibrate when the wave is passing through it. The unit of frequency is Hertz, or 1/second. Wavelength Formula: f = v/λ ​ Where: λ (Lambda) = Wavelength in meters v = Wave velocity f = Frequency (Hz) Thanks for your support, and do visit nitrio.com for more apps for your iOS devices.

About

ProPi System Analyzer

Read full description

ProPi System Analyzer is a professional audio measurement and system alignment tool designed for sound engineers, technicians, and live sound professionals. ProPi helps you analyze and optimize sound systems directly on iPhone with real-time measurement tools for system tuning and acoustic analysis. Key features include: • RTA and spectrum analysis • Phase and magnitude measurement • Impulse response analysis • Group delay measurement • SPL monitoring • Delay and time alignment tools • Sweep and pink-noise measurement • Subwoofer system analysis and alignment • Subwoofer array visualization • Crossover and system tuning tools • Professional audio measurement displays ProPi is designed for PA systems, live sound, speaker alignment, system commissioning, and acoustic troubleshooting. Whether you are aligning subwoofers with main speakers, checking phase relationships, analyzing frequency response, or tuning a complete sound system, ProPi provides the measurement tools needed for professional audio work.

Screenshots

Wavelength Calculator4 screens
ProPi System Analyzer4 screens

Verdict

The call

The clearest difference is price: Wavelength Calculator at $2.99 against ProPi System Analyzer's $19.99. Wavelength Calculator also leads on device support (3 vs 1) and iOS requirement (13 vs 17.0). ProPi System Analyzer's advantage is update cadence (every 5 days vs every 30 months). On 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

CostPrice · In-app purchases · Ads · Monetization

Wavelength Calculator costs $2.99 and ProPi System Analyzer $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Wavelength Calculator ships an update every 30 months, ProPi System Analyzer every 5 days. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

Scorecard4 real differences · 6 level
Wavelength Calculator versus ProPi System Analyzer: the parameters behind the verdict, then further details
ParameterWavelength CalculatorProPi System Analyzer
Price$2.99 — better$19.99
Rating2.6 (5 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings5 — better—
Update frequencyEvery 30 monthsEvery 5 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13 — better17.0
Further details — not scored
Size1 MB59 MB
Age rating4+4+
DeveloperNitrioAnh Viet Do

In-app purchases

None

Wavelength Calculator

No in-app purchases

None

ProPi System Analyzer

No in-app purchases

Questions

Is Wavelength Calculator free?
Wavelength Calculator costs $2.99, with no in-app purchases.
Is ProPi System Analyzer free?
ProPi System Analyzer costs $19.99, with no in-app purchases.
Do Wavelength Calculator or ProPi System Analyzer have ads?
Neither Wavelength Calculator nor ProPi System Analyzer shows ads.
Which is updated more often, Wavelength Calculator or ProPi System Analyzer?
Wavelength Calculator ships an update every 30 months, and ProPi System Analyzer every 5 days. Most recently, Wavelength Calculator was updated on November 2, 2026 and ProPi System Analyzer on November 3, 2026.

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