# Rot13 (Unix Flashback) vs Receive SMS Plus

The clearest difference is rating: Receive SMS Plus at 4.4 against Rot13 (Unix Flashback)'s 3.7. Receive SMS Plus also leads on update cadence (every 4 days vs every 26 months) and ratings volume (1.5K vs 3). Rot13 (Unix Flashback)'s advantage is in-app purchases (none vs 2). On price, ads and device support there is nothing between them.

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

Receive SMS Plus holds the better App Store score, 4.4 against 3.7. That said, the two scores are not equally well evidenced: Receive SMS Plus has 1.5K ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 75% of Rot13 (Unix Flashback)'s written reviews are positive against 84% of Receive SMS Plus's.

Rot13 (Unix Flashback) ships an update every 26 months, Receive SMS Plus every 4 days. The most recent releases landed on October 20, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Rot13 (Unix Flashback) | Receive SMS Plus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (3 ratings)](https://appshunter.io/ios/app/rot13-unix-flashback/id995122989/reviews) | **[4.4 (1.5K ratings)](https://appshunter.io/ios/app/receive-sms-plus/id6463490061/reviews)** |
| Number of ratings | 3 | **1.5K** |
| Positive reviews | 75.0% of reviews | **83.9% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 26 months | **Every 4 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 1 MB | 52 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Macplugins](https://appshunter.io/developer/364191414) | [COMUNIT LIMITED](https://appshunter.io/developer/1517214445) |

## 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


### Receive SMS Plus

[App page](https://appshunter.io/ios/app/receive-sms-plus/id6463490061)

This app provides a convenient way to receive SMS messages for verification on various online services. Access a global selection of phone numbers to easily verify new accounts or log into existing ones.

**Highlights:** Receive SMS for verification, Global phone number selection, Verify new accounts, Log into existing accounts, Fast and reliable service

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SMS Credits | $1.99 | one-time |
| SMS Credits | $4.99 | one-time |

**What reviewers like**

- 🚀 Easy to use
- 🔒 Reliable service
- 👍 User-friendly interface
- 💡 Useful for privacy and verification
- 🚀 Fast and simple

**What reviewers complain about**

- 🐛 Occasional errors with orders
- 🔒 Limited availability in certain regions

**Reported bugs**

- Order placement errors
- Compatibility issues with older devices

**Requested features**

- Better organization of member deals
- More comprehensive service coverage


## Frequently asked questions

### Is Rot13 (Unix Flashback) free?

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

### Is Receive SMS Plus free?

Receive SMS Plus is free to download, with in-app purchases available.

### Which has better reviews, Rot13 (Unix Flashback) or Receive SMS Plus?

Receive SMS Plus is rated higher. Rot13 (Unix Flashback) averages 3.7 out of 5 from 3 ratings, while Receive SMS Plus averages 4.4 from 1.5K ratings.

### Do Rot13 (Unix Flashback) or Receive SMS Plus have ads?

Neither Rot13 (Unix Flashback) nor Receive SMS Plus shows ads.

### Which is updated more often, Rot13 (Unix Flashback) or Receive SMS Plus?

Rot13 (Unix Flashback) ships an update every 26 months, and Receive SMS Plus every 4 days. Most recently, Rot13 (Unix Flashback) was updated on October 20, 2026 and Receive SMS Plus on October 30, 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.*