# easy_print vs Doppler Effect Calculator

The clearest difference is price: easy_print at Free against Doppler Effect Calculator's $2.99. easy_print also leads on iOS requirement (9.0 vs 17.6). Doppler Effect Calculator's advantage is rating (5.0 vs 1.0). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.

easy_print 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.

Doppler Effect Calculator holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

easy_print ships an update every 30 months, Doppler Effect Calculator every 26 months. The most recent releases landed on October 3, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | easy_print | Doppler Effect Calculator |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/easy-print/id998928048/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/doppler-effect-calculator/id1410084954/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 30 months | **Every 26 months** |
| Monetization | **Free** | Paid |
| Size | 7 MB | 1 MB |
| Requires iOS | **9.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [慧洁 谢](https://appshunter.io/developer/998928047) | [Nitrio](https://appshunter.io/developer/321121189) |

## What reviewers say

### easy_print

[App page](https://appshunter.io/ios/app/easy-print/id998928048)

This utility app streamlines ticketing input by connecting to a Bluetooth printer. It allows for quick printing of receipts directly from your device.

**Highlights:** Speed up ticketing input, Bluetooth printer connectivity, Print receipts, Utility for ticket management

**Features:** macOS Compatibility

**In-app purchases:** none


### Doppler Effect Calculator

[App page](https://appshunter.io/ios/app/doppler-effect-calculator/id1410084954)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is easy_print free?

easy_print is free to download, with no in-app purchases.

### Is Doppler Effect Calculator free?

Doppler Effect Calculator costs $2.99, with no in-app purchases.

### Which has better reviews, easy_print or Doppler Effect Calculator?

Doppler Effect Calculator is rated higher. easy_print averages 1.0 out of 5 from 1 ratings, while Doppler Effect Calculator averages 5.0 from 1 ratings.

### Do easy_print or Doppler Effect Calculator have ads?

Neither easy_print nor Doppler Effect Calculator shows ads.

### Which is updated more often, easy_print or Doppler Effect Calculator?

easy_print ships an update every 30 months, and Doppler Effect Calculator every 26 months. Most recently, easy_print was updated on October 3, 2026 and Doppler Effect Calculator on October 8, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*