# EGD2021 vs EchoSense

The clearest difference is update cadence: EchoSense at every 5 months against EGD2021's every 25 months. On price, ads, in-app purchases and device support there is nothing between them.

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

EGD2021 ships an update every 25 months, EchoSense every 5 months. The most recent releases landed on September 8, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | EGD2021 | EchoSense |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 25 months | **Every 5 months** |
| Size | 1 MB | 18 MB |
| Requires iOS | **14.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shiu Yin Yuen](https://appshunter.io/developer/1569119882) | [K12 Ventures Foundation, Inc.](https://appshunter.io/developer/1665403820) |

## What reviewers say

### EGD2021

[App page](https://appshunter.io/ios/app/egd2021/id1559438204)

**Features:** macOS Compatibility

**In-app purchases:** none


### EchoSense

[App page](https://appshunter.io/ios/app/echosense/id6742468000)

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

**In-app purchases:** none


## Frequently asked questions

### Is EGD2021 free?

EGD2021 is free to download, with no in-app purchases.

### Is EchoSense free?

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

### Do EGD2021 or EchoSense have ads?

Neither EGD2021 nor EchoSense shows ads.

### Which is updated more often, EGD2021 or EchoSense?

EGD2021 ships an update every 25 months, and EchoSense every 5 months. Most recently, EGD2021 was updated on September 8, 2026 and EchoSense on September 12, 2026.

---

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