# ROT13 Decoder vs CardCosmic

The clearest difference is update cadence: CardCosmic at monthly against ROT13 Decoder's every 8 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ROT13 Decoder ships an update every 8 months, CardCosmic monthly. The most recent releases landed on October 13, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | ROT13 Decoder | CardCosmic |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.3 (3.6K ratings)](https://appshunter.io/ios/app/cardcosmic/id6756063147/reviews)** |
| Number of ratings | — | **3.6K** |
| Positive reviews | — | 26.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Monthly** |
| Monetization | — | Free |
| Size | 16 MB | 105 MB |
| Requires iOS | **15.0** | 15.5 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [佳伟 蔡](https://appshunter.io/developer/1801859662) | [CardCosmic, Inc.](https://appshunter.io/developer/1858125991) |

## What reviewers say

### ROT13 Decoder

[App page](https://appshunter.io/ios/app/rot13-decoder/id6743629613)

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

**In-app purchases:** none


### CardCosmic

[App page](https://appshunter.io/ios/app/cardcosmic/id6756063147)

Easily convert unwanted gift cards into cash. The platform offers instant quotes, fast withdrawals, and competitive rates with secure transactions. Track your orders in real-time for a seamless selling experience.

**Highlights:** Sell gift cards instantly, Fast and easy withdrawals, Best market rates, Secure transactions, Track every order

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

**In-app purchases:** none


## Frequently asked questions

### Is ROT13 Decoder free?

ROT13 Decoder is free to download, with no in-app purchases.

### Is CardCosmic free?

CardCosmic is free to download, with no in-app purchases.

### Do ROT13 Decoder or CardCosmic have ads?

Neither ROT13 Decoder nor CardCosmic shows ads.

### Which is updated more often, ROT13 Decoder or CardCosmic?

ROT13 Decoder ships an update every 8 months, and CardCosmic monthly. Most recently, ROT13 Decoder was updated on October 13, 2026 and CardCosmic on October 22, 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.*