# ER1 ALARM vs Dimensione

The clearest difference is update cadence: Dimensione at fortnightly against ER1 ALARM's every 2 months. ER1 ALARM's advantage is 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, Dimensione fortnightly. The most recent releases landed on September 11, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | ER1 ALARM | Dimensione |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Size | 46 MB | 49 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [IMG Sicurezza Italia S.R.L.S.](https://appshunter.io/developer/1495771178) | [Dimensione srl](https://appshunter.io/developer/1831530139) |

## What reviewers say

### ER1 ALARM

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Dimensione

[App page](https://appshunter.io/ios/app/dimensione/id6749636901)

**Features:** Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is ER1 ALARM free?

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

### Is Dimensione free?

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

### Do ER1 ALARM or Dimensione have ads?

Neither ER1 ALARM nor Dimensione shows ads.

### Which is updated more often, ER1 ALARM or Dimensione?

ER1 ALARM ships an update every 2 months, and Dimensione fortnightly. Most recently, ER1 ALARM was updated on September 11, 2026 and Dimensione on October 25, 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.*