Rot13 (Unix Flashback) vs Receive SMS Plus
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Rot13 (Unix Flashback)
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.
- Letter substitution cipher
- Rotate by 13 positions
- Hide spoilers and sensitive content
- Share text from other apps
- Integrate with shortcuts
Read full descriptionHide full description
Rot-13 (short for rotate 13) is a simple letter substitution cipher that was popular in online forums for hiding spoilers, punchlines, offensive material, and other things from a casual glance. It works by replacing the current english letters in a message with those that are 13 positions ahead in the alphabet. For example, the letter a is replaced by n, b by o, c by p, etc. Numbers and punctuation are not encoded. This lets you type in and convert with the app, share text from another app to convert, or include in a shortcut.
Receive SMS Plus
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.
- Receive SMS for verification
- Global phone number selection
- Verify new accounts
- Log into existing accounts
- Fast and reliable service
Read full descriptionHide full description
The SMS Verification app is a convenient tool that allows users to receive SMS messages for verification purposes on services such as Facebook and WhatsApp. With a diverse selection of phone numbers from around the world, the app makes it easy for users to receive SMS messages no matter where they are. Whether you need to verify a new account or log into an existing one, the SMS Verification app has you covered. Simply select a phone number from the available options, and you'll be able to receive SMS messages on that number. The app is fast, reliable, and easy to use, making it the perfect choice for anyone in need of SMS verification.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Rot13 (Unix Flashback) | Receive SMS Plus |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (3 ratings) | 4.4 (1.5K ratings) — better |
| Positive reviews | 75.0% of reviews | 83.9% of reviews — better |
| Number of ratings | 3 | 1.5K — better |
| Update frequency | Every 26 months | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 1 MB | 52 MB |
| Age rating | 4+ | 17+ |
| Developer | Macplugins | COMUNIT LIMITED |
Customer experience
Rot13 (Unix Flashback)
Receive SMS Plus
Bugs and requests
Rot13 (Unix Flashback)
Not enough reviews yet to summarise bugs or requests.
Receive SMS Plus
Reported bugs
2 issues- Order placement errors
- Compatibility issues with older devices
Requested features
2 requests- Better organization of member deals
- More comprehensive service coverage
In-app purchases
Rot13 (Unix Flashback)
No in-app purchases
Receive SMS Plus
- SMS Credits$1.99
- SMS Credits$4.99
Questions
Is Rot13 (Unix Flashback) free?
Is Receive SMS Plus free?
Which has better reviews, Rot13 (Unix Flashback) or Receive SMS Plus?
Do Rot13 (Unix Flashback) or Receive SMS Plus have ads?
Which is updated more often, Rot13 (Unix Flashback) or Receive SMS Plus?
Other comparisons
