# GSM Dialer vs SWI

The clearest difference is update cadence: SWI at every 4 months against GSM Dialer's every 10 months. GSM Dialer's advantage is iOS requirement (13.0 vs 15.1). 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.

GSM Dialer ships an update every 10 months, SWI every 4 months. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | GSM Dialer | SWI |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 4 months** |
| Monetization | Free | — |
| Size | 5 MB | 30 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Keystone Electronics Limited](https://appshunter.io/developer/989365169) | [System With Intellgence Inc](https://appshunter.io/developer/1617279719) |

## 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


### SWI

[App page](https://appshunter.io/ios/app/swi-iot/id6484276739)

**In-app purchases:** none


## Frequently asked questions

### Is GSM Dialer free?

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

### Is SWI free?

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

### Do GSM Dialer or SWI have ads?

Neither GSM Dialer nor SWI shows ads.

### Which is updated more often, GSM Dialer or SWI?

GSM Dialer ships an update every 10 months, and SWI every 4 months. Most recently, GSM Dialer was updated on November 1, 2026 and SWI on October 30, 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.*