# IngSoft InterWatt (eIAM) vs eAlarm connect 4

The clearest difference is update cadence: IngSoft InterWatt (eIAM) at fortnightly against eAlarm connect 4's every 5 weeks. IngSoft InterWatt (eIAM) also leads on device support (3 vs 1) and iOS requirement (15.6 vs 18.5). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

IngSoft InterWatt (eIAM) ships an update fortnightly, eAlarm connect 4 every 5 weeks. Both last shipped on November 8, 2026.

## The numbers

| Metric | IngSoft InterWatt (eIAM) | eAlarm connect 4 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 5 weeks |
| Size | 51 MB | 42 MB |
| Requires iOS | **15.6** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [IngSoft GmbH](https://appshunter.io/developer/945284664) | [Blaser Mobile Solutions](https://appshunter.io/developer/1795705122) |

## What reviewers say

### IngSoft InterWatt (eIAM)

[App page](https://appshunter.io/ios/app/ingsoft-interwatt-eiam/id6740481986)

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

**In-app purchases:** none


### eAlarm connect 4

[App page](https://appshunter.io/ios/app/ealarm-connect-4/id6751341660)

**In-app purchases:** none


## Frequently asked questions

### Is IngSoft InterWatt (eIAM) free?

IngSoft InterWatt (eIAM) is free to download, with no in-app purchases.

### Is eAlarm connect 4 free?

eAlarm connect 4 is free to download, with no in-app purchases.

### Do IngSoft InterWatt (eIAM) or eAlarm connect 4 have ads?

Neither IngSoft InterWatt (eIAM) nor eAlarm connect 4 shows ads.

### Which is updated more often, IngSoft InterWatt (eIAM) or eAlarm connect 4?

IngSoft InterWatt (eIAM) ships an update fortnightly, and eAlarm connect 4 every 5 weeks. Most recently, IngSoft InterWatt (eIAM) was updated on November 8, 2026 and eAlarm connect 4 on November 8, 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.*