# Sentrius BT510 vs KEUCO Sensor

The clearest difference is iOS requirement: KEUCO Sensor at 9.0 against Sentrius BT510's 13.6. 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.

Sentrius BT510 ships an update every 6 months, KEUCO Sensor every 5 months. The most recent releases landed on October 10, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Sentrius BT510 | KEUCO Sensor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 5 months** |
| Size | 80 MB | 35 MB |
| Requires iOS | 13.6 | **9.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ezurio LLC](https://appshunter.io/developer/1529015949) | [KEUCO GmbH & Co. KG](https://appshunter.io/developer/463771710) |

## What reviewers say

### Sentrius BT510

[App page](https://appshunter.io/ios/app/sentrius-bt510/id1495394256)

**Features:** macOS Compatibility

**In-app purchases:** none


### KEUCO Sensor

[App page](https://appshunter.io/ios/app/keuco-sensor/id1581736605)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sentrius BT510 free?

Sentrius BT510 is free to download, with no in-app purchases.

### Is KEUCO Sensor free?

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

### Do Sentrius BT510 or KEUCO Sensor have ads?

Neither Sentrius BT510 nor KEUCO Sensor shows ads.

### Which is updated more often, Sentrius BT510 or KEUCO Sensor?

Sentrius BT510 ships an update every 6 months, and KEUCO Sensor every 5 months. Most recently, Sentrius BT510 was updated on October 10, 2026 and KEUCO Sensor on October 4, 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.*