# Crypto String vs PeekMD

The clearest difference is price: PeekMD at Free against Crypto String's $0.99. PeekMD also leads on update cadence (every 3 days vs every 4 months). Crypto String's advantage is in-app purchases (none vs 3) and iOS requirement (18.0 vs 26.0). On ads and device support there is nothing between them.

PeekMD is free to download; Crypto String costs $0.99 up front. PeekMD sells 3 one-off in-app purchases. Crypto String asks for nothing beyond the download.

Crypto String ships an update every 4 months, PeekMD every 3 days. The most recent releases landed on October 25, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Crypto String | PeekMD |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 days** |
| Size | 0 MB | 3 MB |
| Requires iOS | **18.0** | 26.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Xu Wang](https://appshunter.io/developer/1216698112) | [金苹 卢](https://appshunter.io/developer/1885537846) |

## What reviewers say

### Crypto String

[App page](https://appshunter.io/ios/app/crypto-string-aes-encrypt/id6754283595)

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

**In-app purchases:** none


### PeekMD

[App page](https://appshunter.io/ios/app/peekmd-markdown-html-viewer/id6775353195)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 10次转换次数 | $0.99 | one-time |
| PeekMD PRO | $1.99 | one-time |
| 50次转换次数 | $2.99 | one-time |


## Frequently asked questions

### Is Crypto String free?

Crypto String costs $0.99, with no in-app purchases.

### Is PeekMD free?

PeekMD is free to download, with in-app purchases available.

### Do Crypto String or PeekMD have ads?

Neither Crypto String nor PeekMD shows ads.

### Which is updated more often, Crypto String or PeekMD?

Crypto String ships an update every 4 months, and PeekMD every 3 days. Most recently, Crypto String was updated on October 25, 2026 and PeekMD on October 10, 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.*