Rot13 (Unix Flashback) vs ROT13 Decoder
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
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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.
ROT13 Decoder
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ROT13 Decoder is a simple yet powerful text encoding/decoding tool that supports ROT13, ROT5, and ROT18 encoding methods. Whether you're performing simple text encryption or need to quickly decode ROT-encrypted content, this app makes it effortless. Key Features: 1. ROT13: Shifts letters by 13 positions 2. ROT5: Shifts numbers by 5 positions 3. ROT18: Shifts both letters and numbers simultaneously Why Choose Us: 1. Completely offline operation for privacy protection 2. Clean and intuitive interface 3. One-click result copying 4. Zero learning curve, ready to use instantly This lightweight yet practical tool puts powerful decoding capabilities right at your fingertips, making ROT-encoded text handling a breeze on your device.
Screenshots
Verdict
The clearest difference is update cadence: ROT13 Decoder at every 8 months against Rot13 (Unix Flashback)'s every 26 months. ROT13 Decoder also leads on iOS requirement (15.0 vs 18.0). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Rot13 (Unix Flashback) ships an update every 26 months, ROT13 Decoder every 8 months. The most recent releases landed on June 4, 2026 and September 9, 2026 respectively.
| Parameter | Rot13 (Unix Flashback) | ROT13 Decoder |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 75.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 26 months | Every 8 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 18.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Macplugins | 佳伟 蔡 |
In-app purchases
Rot13 (Unix Flashback)
No in-app purchases
ROT13 Decoder
No in-app purchases
Questions
Is Rot13 (Unix Flashback) free?
Is ROT13 Decoder free?
Do Rot13 (Unix Flashback) or ROT13 Decoder have ads?
Which is updated more often, Rot13 (Unix Flashback) or ROT13 Decoder?
Other comparisons
