# ER1 ALARM vs TeamSystem IDSign

The clearest difference is update cadence: ER1 ALARM at every 2 months against TeamSystem IDSign's every 9 months. ER1 ALARM also leads on iOS requirement (11.0 vs 15.0). 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.

ER1 ALARM ships an update every 2 months, TeamSystem IDSign every 9 months. The most recent releases landed on May 17, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | ER1 ALARM | TeamSystem IDSign |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 9 months |
| Size | 46 MB | 25 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [IMG Sicurezza Italia S.R.L.S.](https://appshunter.io/developer/1495771178) | [Teamsystem SPA](https://appshunter.io/developer/545232556) |

## What reviewers say

### ER1 ALARM

[App page](https://appshunter.io/ios/app/er1-alarm/id6444775610)

**Features:** macOS Compatibility

**In-app purchases:** none


### TeamSystem IDSign

[App page](https://appshunter.io/ios/app/teamsystem-idsign/id6670606360)

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

**In-app purchases:** none


## Frequently asked questions

### Is ER1 ALARM free?

ER1 ALARM is free to download, with no in-app purchases.

### Is TeamSystem IDSign free?

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

### Do ER1 ALARM or TeamSystem IDSign have ads?

Neither ER1 ALARM nor TeamSystem IDSign shows ads.

### Which is updated more often, ER1 ALARM or TeamSystem IDSign?

ER1 ALARM ships an update every 2 months, and TeamSystem IDSign every 9 months. Most recently, ER1 ALARM was updated on May 17, 2026 and TeamSystem IDSign on September 17, 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.*