# microsonic Ultrasonic Sensors vs EchoLog 3

The clearest difference is update cadence: EchoLog 3 at every 3 weeks against microsonic Ultrasonic Sensors's every 4 months. microsonic Ultrasonic Sensors's advantage is iOS requirement (11.0 vs 13.0). 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.

microsonic Ultrasonic Sensors ships an update every 4 months, EchoLog 3 every 3 weeks. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | microsonic Ultrasonic Sensors | EchoLog 3 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Size | 50 MB | 6 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [unternehmen online GmbH & Co. KG](https://appshunter.io/developer/430828920) | [Munters Israel LTD](https://appshunter.io/developer/1401397003) |

## What reviewers say

### microsonic Ultrasonic Sensors

[App page](https://appshunter.io/ios/app/microsonic-ultrasonic-sensors/id513848823)

**Features:** macOS Compatibility

**In-app purchases:** none


### EchoLog 3

[App page](https://appshunter.io/ios/app/echolog-3/id6444918924)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is microsonic Ultrasonic Sensors free?

microsonic Ultrasonic Sensors is free to download, with no in-app purchases.

### Is EchoLog 3 free?

EchoLog 3 is free to download, with no in-app purchases.

### Do microsonic Ultrasonic Sensors or EchoLog 3 have ads?

Neither microsonic Ultrasonic Sensors nor EchoLog 3 shows ads.

### Which is updated more often, microsonic Ultrasonic Sensors or EchoLog 3?

microsonic Ultrasonic Sensors ships an update every 4 months, and EchoLog 3 every 3 weeks. Most recently, microsonic Ultrasonic Sensors was updated on October 26, 2026 and EchoLog 3 on October 27, 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.*