# Secure 2FA vs SJ IPv4 Calculator

The clearest difference is in-app purchases: Secure 2FA at none against SJ IPv4 Calculator's 5. Secure 2FA also leads on ads (none vs shown). SJ IPv4 Calculator's advantage is update cadence (weekly vs every 27 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. SJ IPv4 Calculator sells 5 one-off in-app purchases. Secure 2FA asks for nothing beyond the download.

Secure 2FA ships an update every 27 months, SJ IPv4 Calculator weekly. The most recent releases landed on October 17, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Secure 2FA | SJ IPv4 Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 27 months | **Weekly** |
| Size | 20 MB | 4 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sergio Silva](https://appshunter.io/developer/967225980) | [Stephane JAILLIARD](https://appshunter.io/developer/1749751077) |

## What reviewers say

### Secure 2FA

[App page](https://appshunter.io/ios/app/secure-2fa/id6448633867)

**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 Secure 2FA free?

Secure 2FA 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 Secure 2FA or SJ IPv4 Calculator have ads?

SJ IPv4 Calculator shows ads; Secure 2FA does not.

### Which is updated more often, Secure 2FA or SJ IPv4 Calculator?

Secure 2FA ships an update every 27 months, and SJ IPv4 Calculator weekly. Most recently, Secure 2FA was updated on October 17, 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.*