# Rot13 (Unix Flashback) vs Push Authenticator Pro

The clearest difference is rating: Rot13 (Unix Flashback) at 5.0 against Push Authenticator Pro's 4.0. Rot13 (Unix Flashback) also leads on in-app purchases (none vs 2). Push Authenticator Pro's advantage is iOS requirement (10.0 vs 18.0). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Push Authenticator Pro sells 2 one-off in-app purchases. Rot13 (Unix Flashback) asks for nothing beyond the download.

Rot13 (Unix Flashback) holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Rot13 (Unix Flashback) ships an update every 26 months, Push Authenticator Pro every 14 months. The most recent releases landed on June 4, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Rot13 (Unix Flashback) | Push Authenticator Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/rot13-unix-flashback/id995122989/reviews)** | [4.0 (1 ratings)](https://appshunter.io/ios/app/push-authenticator-pro/id1436459026/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 26 months | **Every 14 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 1 MB | 20 MB |
| Requires iOS | 18.0 | **10.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Macplugins](https://appshunter.io/developer/364191414) | [Tachyon Factory Inc.](https://appshunter.io/developer/1354769057) |

## What reviewers say

### Rot13 (Unix Flashback)

[App page](https://appshunter.io/ios/app/rot13-unix-flashback/id995122989)

This utility app performs a simple letter substitution cipher, rotating English letters by 13 positions. It's useful for obscuring text like spoilers or sensitive content from casual viewers. You can type directly, share text from other apps, or integrate it with shortcuts.

**Highlights:** Letter substitution cipher, Rotate by 13 positions, Hide spoilers and sensitive content, Share text from other apps, Integrate with shortcuts

**Features:** macOS Compatibility

**In-app purchases:** none


### Push Authenticator Pro

[App page](https://appshunter.io/ios/app/push-authenticator-pro/id1436459026)

Streamline your logins with instant push notifications for verification codes. Avoid manual entry by simply tapping 'Send' on your phone to automatically transfer codes to your browser. Quickly find and access your 2FA codes with a built-in search filter.

**Highlights:** Push notification authentication, Automatic verification code transfer, Action extension for clipboard copy, Search filter for 2FA codes, End-to-end encryption for data transfer, Secure storage of 2FA secrets

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month Premium Subscription | $0.99 | one-time |
| 1 Year Premium Subscription | $5.99 | one-time |


## Frequently asked questions

### Is Rot13 (Unix Flashback) free?

Rot13 (Unix Flashback) is free to download, with no in-app purchases.

### Is Push Authenticator Pro free?

Push Authenticator Pro is free to download, with in-app purchases available.

### Which has better reviews, Rot13 (Unix Flashback) or Push Authenticator Pro?

Rot13 (Unix Flashback) is rated higher. Rot13 (Unix Flashback) averages 5.0 out of 5 from 2 ratings, while Push Authenticator Pro averages 4.0 from 1 ratings.

### Do Rot13 (Unix Flashback) or Push Authenticator Pro have ads?

Neither Rot13 (Unix Flashback) nor Push Authenticator Pro shows ads.

### Which is updated more often, Rot13 (Unix Flashback) or Push Authenticator Pro?

Rot13 (Unix Flashback) ships an update every 26 months, and Push Authenticator Pro every 14 months. Most recently, Rot13 (Unix Flashback) was updated on June 4, 2026 and Push Authenticator Pro on September 8, 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.*