# GSM Dialer vs AlarmSMS Controller

The clearest difference is in-app purchases: GSM Dialer at none against AlarmSMS Controller's 1. GSM Dialer also leads on iOS requirement (13.0 vs 16.0). AlarmSMS Controller's advantage is update cadence (monthly vs every 10 months). On price, ads and device support there is nothing between them.

Both are free to download. AlarmSMS Controller sells 1 one-off in-app purchase. GSM Dialer asks for nothing beyond the download.

GSM Dialer ships an update every 10 months, AlarmSMS Controller monthly. The most recent releases landed on October 11, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | GSM Dialer | AlarmSMS Controller |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 months | **Monthly** |
| Monetization | Free | — |
| Size | 5 MB | 52 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Keystone Electronics Limited](https://appshunter.io/developer/989365169) | [George Alexandrou](https://appshunter.io/developer/1875566334) |

## What reviewers say

### GSM Dialer

[App page](https://appshunter.io/ios/app/gsm-dialer/id925273308)

Control and program compatible GSM Auto Dialers remotely from your iPhone. Receive instant voice or SMS alerts for security and environmental events. Manage dialer settings, phone numbers, and SMS messages with ease.

**Highlights:** Remote On/Off control, Activate dialer outputs, Program up to 9 phone numbers, Select numbers based on trigger, Create custom SMS messages, Configure test calls, Reset to factory defaults

**Features:** macOS Compatibility

**In-app purchases:** none


### AlarmSMS Controller

[App page](https://appshunter.io/ios/app/alarmsms-controller/id6773087060)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AlarmSMS Pro | $4.99 | one-time |


## Frequently asked questions

### Is GSM Dialer free?

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

### Is AlarmSMS Controller free?

AlarmSMS Controller is free to download, with in-app purchases available.

### Do GSM Dialer or AlarmSMS Controller have ads?

Neither GSM Dialer nor AlarmSMS Controller shows ads.

### Which is updated more often, GSM Dialer or AlarmSMS Controller?

GSM Dialer ships an update every 10 months, and AlarmSMS Controller monthly. Most recently, GSM Dialer was updated on October 11, 2026 and AlarmSMS Controller on October 15, 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.*