# Sensor Technology Engineering vs SendBySound

The clearest difference is ads: Sensor Technology Engineering at none against SendBySound's shown. Sensor Technology Engineering also leads on iOS requirement (13.0 vs 16.0). On price, 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.

## The numbers

| Metric | Sensor Technology Engineering | SendBySound |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | — |
| Size | 94 MB | 3 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sensor Technology Engineering](https://appshunter.io/developer/1668239053) | [Will Jackson](https://appshunter.io/developer/1859424571) |

## What reviewers say

### Sensor Technology Engineering

[App page](https://appshunter.io/ios/app/sensor-technology-engineering/id1627959712)

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

**In-app purchases:** none


### SendBySound

[App page](https://appshunter.io/ios/app/sendbysound/id6756238388)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sensor Technology Engineering free?

Sensor Technology Engineering is free to download, with no in-app purchases.

### Is SendBySound free?

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

### Do Sensor Technology Engineering or SendBySound have ads?

SendBySound shows ads; Sensor Technology Engineering does not.

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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.*