# bestzero vs iSubnet Calculator

The clearest difference is in-app purchases: bestzero at none against iSubnet Calculator's 3. bestzero also leads on iOS requirement (13.0 vs 15.0). iSubnet Calculator's advantage is update cadence (every 2 days vs every 5 months). On price, ads and device support there is nothing between them.

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

bestzero ships an update every 5 months, iSubnet Calculator every 2 days. The most recent releases landed on October 27, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | bestzero | iSubnet Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 days** |
| Size | 55 MB | 20 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Cord aware GmbH Informationslogistik](https://appshunter.io/developer/1082977691) | [CHRISTOS PEIVANIS](https://appshunter.io/developer/6794944108) |

## What reviewers say

### bestzero

[App page](https://appshunter.io/ios/app/bestzero/id1610518247)

**Features:** macOS Compatibility

**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 bestzero free?

bestzero 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 bestzero or iSubnet Calculator have ads?

Neither bestzero nor iSubnet Calculator shows ads.

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

bestzero ships an update every 5 months, and iSubnet Calculator every 2 days. Most recently, bestzero was updated on October 27, 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.*