# SMS Alert vs Applets Center

The clearest difference is update cadence: Applets Center at every 9 days against SMS Alert's every 14 months. SMS Alert's advantage is iOS requirement (9.0 vs 12.0). 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.

SMS Alert ships an update every 14 months, Applets Center every 9 days. The most recent releases landed on July 7, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | SMS Alert | Applets Center |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (2 ratings)](https://appshunter.io/ios/app/sms-alert/id1100172188/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 9 days** |
| Monetization | Free | — |
| Size | 7 MB | 23 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [朝山 马](https://appshunter.io/developer/596304901) | [桂花 陈](https://appshunter.io/developer/1683094766) |

## What reviewers say

### SMS Alert

[App page](https://appshunter.io/ios/app/sms-alert/id1100172188)

This app monitors temperature, humidity, analog signals, and power status for various devices. It sends alerts via SMS and phone calls when predefined limits are reached. Users can also query device status via text and schedule periodic reports.

**Highlights:** Temperature and humidity monitoring, Analog signal monitoring (4-20mA, 0-5V), Power monitoring (single/three-phase), SMS and phone call alerts, Remote status query via text, Scheduled status reporting, Modbus RTU/TCP cloud platform support

**Features:** macOS Compatibility

**In-app purchases:** none


### Applets Center

[App page](https://appshunter.io/ios/app/applets-center/id6447957030)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SMS Alert free?

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

### Is Applets Center free?

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

### Do SMS Alert or Applets Center have ads?

Neither SMS Alert nor Applets Center shows ads.

### Which is updated more often, SMS Alert or Applets Center?

SMS Alert ships an update every 14 months, and Applets Center every 9 days. Most recently, SMS Alert was updated on July 7, 2026 and Applets Center on June 1, 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.*