# Care Alert US vs MerryIoT Sensor

The clearest difference is iOS requirement: MerryIoT Sensor at 13.0 against Care Alert US's 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.

Care Alert US ships an update every 3 months, MerryIoT Sensor every 5 months. The most recent releases landed on October 24, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Care Alert US | MerryIoT Sensor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (2 ratings)](https://appshunter.io/ios/app/merryiot-sensor/id1614807356/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 5 months |
| Monetization | — | Free |
| Size | 308 MB | 33 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Climax Technology Co., LTD.](https://appshunter.io/developer/438141751) | [BROWAN COMMUNICATIONS INCORPORATION](https://appshunter.io/developer/1584963490) |

## What reviewers say

### Care Alert US

[App page](https://appshunter.io/ios/app/care-alert-us/id1367350381)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### MerryIoT Sensor

[App page](https://appshunter.io/ios/app/merryiot-sensor/id1614807356)

Monitor your home's environment with this app. It tracks air quality, detects water leaks, and alerts you to unexpected movement, helping ensure a healthy and safe living space.

**Highlights:** Air quality monitoring, Water leak detection, Movement detection, Home safety alerts, Healthy home environment

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Care Alert US free?

Care Alert US is free to download, with no in-app purchases.

### Is MerryIoT Sensor free?

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

### Do Care Alert US or MerryIoT Sensor have ads?

Neither Care Alert US nor MerryIoT Sensor shows ads.

### Which is updated more often, Care Alert US or MerryIoT Sensor?

Care Alert US ships an update every 3 months, and MerryIoT Sensor every 5 months. Most recently, Care Alert US was updated on October 24, 2026 and MerryIoT Sensor on October 9, 2026.

---

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