# Crypto String vs Keywave.

The clearest difference is price: Keywave. at Free against Crypto String's $0.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

Keywave. is free to download; Crypto String costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Crypto String ships an update every 4 months, Keywave. every 6 months. The most recent releases landed on September 19, 2026 and September 1, 2026 respectively.

## The numbers

| Metric | Crypto String | Keywave. |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[2.8 (4 ratings)](https://appshunter.io/ios/app/keywave/id6758056425/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 6 months |
| Monetization | — | Free |
| Size | 0 MB | 11 MB |
| Requires iOS | 18.0 | **17.6** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Xu Wang](https://appshunter.io/developer/1216698112) | [William Kelley](https://appshunter.io/developer/1870645864) |

## 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


### Keywave.

[App page](https://appshunter.io/ios/app/keywave/id6758056425)

Securely encrypt and decrypt messages directly on your device. Manage your PGP keys locally without any server interaction or data tracking. Offers robust key generation and import/export options with a clean interface.

**Highlights:** Encrypt and decrypt messages, Generate RSA keypairs, Manage unlimited keys, Import/export keys, Native SwiftUI interface, 100% local processing

**In-app purchases:** none


## Frequently asked questions

### Is Crypto String free?

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

### Is Keywave. free?

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

### Do Crypto String or Keywave. have ads?

Neither Crypto String nor Keywave. shows ads.

### Which is updated more often, Crypto String or Keywave.?

Crypto String ships an update every 4 months, and Keywave. every 6 months. Most recently, Crypto String was updated on September 19, 2026 and Keywave. on September 1, 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.*