Comparison

Doppler Effect Calculator vs EasyPrint

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

Head to head
About

Doppler Effect Calculator

This physics and math calculator helps determine the frequency of sound waves when the source or observer is in motion. It provides instant calculations with copyable results and includes reference formulas. The app supports various units and high precision, working seamlessly on iOS devices.

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

Doppler Effect Calc is a practical physics and audio calculator designed for students, teachers, engineers, sound designers, and anyone working with waves, frequency, sound level, and distance-based attenuation. The app brings together essential acoustic calculation tools in one clean, fast, and easy-to-use interface, helping you solve common sound and wave problems without manual formulas or complicated spreadsheets. Calculate Doppler effect frequency shifts when a sound source or observer is moving. Enter the original frequency, source speed, observer speed, and speed of sound to quickly estimate the perceived frequency. This is useful for physics learning, classroom demonstrations, audio experiments, vehicle sound analysis, and understanding real-world wave behavior. The app also includes decibel calculation tools for working with sound intensity and sound pressure levels. Whether you are comparing level changes, checking dB differences, or learning how logarithmic sound measurement works, Doppler Effect Calc helps make the numbers easier to understand. With the distance attenuation calculator, you can estimate how sound level changes as distance increases or decreases. This is especially helpful for acoustic planning, speaker placement, field measurements, educational examples, and general sound propagation study. Doppler Effect Calc is built for quick, focused calculations. The interface keeps inputs clear, results readable, and formulas easy to reference. A calculation history lets you review previous results, compare values, and avoid repeating work. Built-in reference and information sections provide useful context for the formulas and concepts behind each calculator. Key features include: • Doppler effect frequency calculator • Decibel and sound level tools • Distance attenuation calculator • Calculation history for reviewing previous results • Clear input fields and readable output • Helpful reference information for physics and acoustics • Support for multiple languages • Clean design for study, work, and quick everyday use Whether you are studying wave physics, teaching acoustics, analyzing sound behavior, or simply need a reliable frequency and dB calculator, Doppler Effect Calc gives you a convenient toolkit for fast and accurate sound-related calculations. Thanks for your support, and do visit nitrio.com for more apps for your iOS devices.

About

EasyPrint

Print documents, images, and A4 templates directly from your mobile device. This utility app offers convenient A4 printing capabilities for various file types.

Highlights
  • A4 document printing
  • Image printing
  • Print common A4 templates
  • Mobile printing solution
Features
Read full description

A4 printing on mobile devices, capable of printing documents, images, and commonly used A4 templates.

Screenshots

Doppler Effect Calculator4 screens
EasyPrint3 screens

Verdict

The call

The clearest difference is price: EasyPrint at Free against Doppler Effect Calculator's $2.99. EasyPrint also leads on review sentiment (33% vs 0%) and update cadence (every 3 weeks vs every 26 months). Doppler Effect Calculator's advantage is rating (5.0 vs 1.5). On ratings volume, 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

EasyPrint is free to download; Doppler Effect Calculator costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Doppler Effect Calculator holds the better App Store score, 5.0 against 1.5. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews complicate that: 0% of Doppler Effect Calculator's written reviews are positive against 33% of EasyPrint's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Doppler Effect Calculator ships an update every 26 months, EasyPrint every 3 weeks. The most recent releases landed on November 2, 2026 and November 4, 2026 respectively.

Scorecard6 real differences · 4 level
Doppler Effect Calculator versus EasyPrint: the parameters behind the verdict, then further details
ParameterDoppler Effect CalculatorEasyPrint
Price$2.99Free — better
Rating5.0 (1 ratings) — better1.5 (2 ratings)
Positive reviews0.0% of reviews33.3% of reviews — better
Number of ratings12 — better
Update frequencyEvery 26 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.615.6 — better
Further details — not scored
Size1 MB31 MB
Age rating4+17+
DeveloperNitrio少清 林

Customer experience

Doppler Effect Calculator

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

EasyPrint

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews3 reviews
Positive33.3%
Neutral0.0%
Negative66.7%

In-app purchases

None

Doppler Effect Calculator

No in-app purchases

None

EasyPrint

No in-app purchases

Questions

Is Doppler Effect Calculator free?
Doppler Effect Calculator costs $2.99, with no in-app purchases.
Is EasyPrint free?
EasyPrint is free to download, with no in-app purchases.
Which has better reviews, Doppler Effect Calculator or EasyPrint?
Doppler Effect Calculator is rated higher. Doppler Effect Calculator averages 5.0 out of 5 from 1 ratings, while EasyPrint averages 1.5 from 2 ratings.
Do Doppler Effect Calculator or EasyPrint have ads?
Neither Doppler Effect Calculator nor EasyPrint shows ads.
Which is updated more often, Doppler Effect Calculator or EasyPrint?
Doppler Effect Calculator ships an update every 26 months, and EasyPrint every 3 weeks. Most recently, Doppler Effect Calculator was updated on November 2, 2026 and EasyPrint on November 4, 2026.

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