# Castel Regolo vs Caleffi View

The clearest difference is iOS requirement: Castel Regolo at 11.0 against Caleffi View's 15.1. On price, update cadence, 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.

Castel Regolo ships an update monthly, Caleffi View every 2 weeks. The most recent releases landed on October 7, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Castel Regolo | Caleffi View |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Size | 18 MB | 32 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Castel S.r.l.](https://appshunter.io/developer/1554507062) | [Caleffi S.p.A](https://appshunter.io/developer/920722440) |

## What reviewers say

### Castel Regolo

[App page](https://appshunter.io/ios/app/castel-regolo/id1586287525)

**Features:** macOS Compatibility

**In-app purchases:** none


### Caleffi View

[App page](https://appshunter.io/ios/app/caleffi-view/id6466146479)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Castel Regolo free?

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

### Is Caleffi View free?

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

### Do Castel Regolo or Caleffi View have ads?

Neither Castel Regolo nor Caleffi View shows ads.

### Which is updated more often, Castel Regolo or Caleffi View?

Castel Regolo ships an update monthly, and Caleffi View every 2 weeks. Most recently, Castel Regolo was updated on October 7, 2026 and Caleffi View on October 20, 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.*