# DefensorRD vs SJ IPv4 Calculator

The clearest difference is in-app purchases: DefensorRD at none against SJ IPv4 Calculator's 5. DefensorRD also leads on ads (none vs shown) and iOS requirement (12.0 vs 16.0). On price, update cadence and device support there is nothing between them.

Both are free to download. SJ IPv4 Calculator sells 5 one-off in-app purchases. DefensorRD asks for nothing beyond the download.

DefensorRD ships an update every 8 days, SJ IPv4 Calculator weekly. The most recent releases landed on October 4, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | DefensorRD | SJ IPv4 Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 8 days | **Weekly** |
| Size | 19 MB | 4 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Defensor Del Pueblo (Republica Dominicana)](https://appshunter.io/developer/1633451800) | [Stephane JAILLIARD](https://appshunter.io/developer/1749751077) |

## What reviewers say

### DefensorRD

[App page](https://appshunter.io/ios/app/defensorrd/id1634310312)

**Features:** macOS Compatibility

**In-app purchases:** none


### SJ IPv4 Calculator

[App page](https://appshunter.io/ios/app/sj-ipv4-calculator/id6503641575)

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| A coffee | $0.99 | one-time |
| A cookie | $2.99 | one-time |
| A lemon tart | $4.99 | one-time |
| No ads | $4.99 | one-time |
| A pizza | $9.99 | one-time |


## Frequently asked questions

### Is DefensorRD free?

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

### Is SJ IPv4 Calculator free?

SJ IPv4 Calculator is free to download, with in-app purchases available.

### Do DefensorRD or SJ IPv4 Calculator have ads?

SJ IPv4 Calculator shows ads; DefensorRD does not.

### Which is updated more often, DefensorRD or SJ IPv4 Calculator?

DefensorRD ships an update every 8 days, and SJ IPv4 Calculator weekly. Most recently, DefensorRD was updated on October 4, 2026 and SJ IPv4 Calculator on October 7, 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.*