# Everspring GSM vs AlarmSMS Controller

The clearest difference is in-app purchases: Everspring GSM at none against AlarmSMS Controller's 1. Everspring GSM also leads on iOS requirement (12.1 vs 16.0). On price, update cadence, ads and device support there is nothing between them.

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

Everspring GSM ships an update every 2 months, AlarmSMS Controller monthly. Both last shipped on September 18, 2026.

## The numbers

| Metric | Everspring GSM | AlarmSMS Controller |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Size | 4 MB | 52 MB |
| Requires iOS | **12.1** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Everspring Inc Co.. Ltd.](https://appshunter.io/developer/574640428) | [George Alexandrou](https://appshunter.io/developer/1875566334) |

## What reviewers say

### Everspring GSM

[App page](https://appshunter.io/ios/app/everspring-gsm/id1104085264)

**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 Everspring GSM free?

Everspring GSM 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 Everspring GSM or AlarmSMS Controller have ads?

Neither Everspring GSM nor AlarmSMS Controller shows ads.

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

Everspring GSM ships an update every 2 months, and AlarmSMS Controller monthly. Most recently, Everspring GSM was updated on September 18, 2026 and AlarmSMS Controller on September 18, 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.*