# ECHO Pro vs D

The clearest difference is device support: D at 3 against ECHO Pro's 1. D also leads on iOS requirement (13.0 vs 15.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on June 1, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | ECHO Pro | D |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | Free | — |
| Size | 103 MB | 31 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Echo Laboratories](https://appshunter.io/developer/935502816) | [广东群宇互动科技有限公司](https://appshunter.io/developer/1019985641) |

## What reviewers say

### ECHO Pro

[App page](https://appshunter.io/ios/app/echo-pro/id1052945965)

This app transforms your compatible iPad into a powerful microscope control and imaging device. Capture, annotate, and share high-quality brightfield and fluorescence images with intuitive on-screen controls and advanced features like Anti-Shake.

**Highlights:** Brightfield imaging with adjustable contrast, Epi-fluorescence imaging (Revolve microscope), Anti-Shake feature for blur-free images, Integrated photo browser and cloud sharing, Photo annotation for cell counting and measurements, Automatic saving of image settings

**In-app purchases:** none


### D

[App page](https://appshunter.io/ios/app/d-pok/id6751189198)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ECHO Pro free?

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

### Is D free?

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

### Do ECHO Pro or D have ads?

Neither ECHO Pro nor D shows ads.

### Which is updated more often, ECHO Pro or D?

ECHO Pro ships an update every 2 weeks, and D every 2 weeks. Most recently, ECHO Pro was updated on June 1, 2026 and D on September 12, 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.*