# Rohnson vs iSubnet Calculator

The clearest difference is in-app purchases: Rohnson at none against iSubnet Calculator's 3. iSubnet Calculator's advantage is update cadence (every 2 days vs every 10 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. iSubnet Calculator sells 3 in-app purchases, starting at $0.99 per month. Rohnson asks for nothing beyond the download.

Rohnson ships an update every 10 months, iSubnet Calculator every 2 days. The most recent releases landed on November 2, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Rohnson | iSubnet Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (9 ratings)](https://appshunter.io/ios/app/rohnson/id1236624226/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 45.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 2 days** |
| Monetization | Free | — |
| Size | 213 MB | 20 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Vassilias S.A](https://appshunter.io/developer/1236624225) | [CHRISTOS PEIVANIS](https://appshunter.io/developer/6794944108) |

## What reviewers say

### Rohnson

[App page](https://appshunter.io/ios/app/rohnson/id1236624226)

Easily connect and control smart home devices remotely. Schedule automated tasks and enjoy a seamless smart home experience focused on user convenience.

**Highlights:** Simple configuration and connection, Remote equipment control, Create execution timing tasks, Intelligent automation, Smart home experience

**Features:** Vision Pro support

**In-app purchases:** none


### iSubnet Calculator

[App page](https://appshunter.io/ios/app/isubnet-calculator/id6794944106)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| iSubnet PRO Monthly | $0.99 | per month |
| iSubnet PRO Yearly | $3.99 | per year |
| iSubnet Lifetime PRO | $8.99 | one-time |


## Frequently asked questions

### Is Rohnson free?

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

### Is iSubnet Calculator free?

iSubnet Calculator is free to download, with in-app purchases available.

### Do Rohnson or iSubnet Calculator have ads?

Neither Rohnson nor iSubnet Calculator shows ads.

### Which is updated more often, Rohnson or iSubnet Calculator?

Rohnson ships an update every 10 months, and iSubnet Calculator every 2 days. Most recently, Rohnson was updated on November 2, 2026 and iSubnet Calculator on November 6, 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.*