# IngSoft InterWatt Mobile vs Sirio2

The clearest difference is update cadence: IngSoft InterWatt Mobile at fortnightly against Sirio2's every 16 months. Sirio2's advantage is iOS requirement (12.4 vs 15.6). 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.

IngSoft InterWatt Mobile ships an update fortnightly, Sirio2 every 16 months. The most recent releases landed on September 16, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | IngSoft InterWatt Mobile | Sirio2 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 16 months |
| Size | 51 MB | 106 MB |
| Requires iOS | 15.6 | **12.4** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [IngSoft GmbH](https://appshunter.io/developer/945284664) | [NewPhone GmbH](https://appshunter.io/developer/1003721659) |

## What reviewers say

### IngSoft InterWatt Mobile

[App page](https://appshunter.io/ios/app/ingsoft-interwatt-mobile/id945284665)

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

**In-app purchases:** none


### Sirio2

[App page](https://appshunter.io/ios/app/sirio2/id1003721660)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is IngSoft InterWatt Mobile free?

IngSoft InterWatt Mobile is free to download, with no in-app purchases.

### Is Sirio2 free?

Sirio2 is free to download, with no in-app purchases.

### Do IngSoft InterWatt Mobile or Sirio2 have ads?

Neither IngSoft InterWatt Mobile nor Sirio2 shows ads.

### Which is updated more often, IngSoft InterWatt Mobile or Sirio2?

IngSoft InterWatt Mobile ships an update fortnightly, and Sirio2 every 16 months. Most recently, IngSoft InterWatt Mobile was updated on September 16, 2026 and Sirio2 on September 14, 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.*