# CryptKB vs NotiZen Pro

The clearest difference is price: CryptKB at Free against NotiZen Pro's $10.49. CryptKB also leads on in-app purchases (none vs 3). On ads, device support and iOS requirement there is nothing between them.

CryptKB is free to download; NotiZen Pro costs $10.49 up front. NotiZen Pro sells 3 in-app purchases, starting at $2.99 per month. CryptKB asks for nothing beyond the download.

## The numbers

| Metric | CryptKB | NotiZen Pro |
| --- | --- | --- |
| Price | **Free** | $10.49 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cryptkb/id6761269767/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Monthly |
| Monetization | Free | — |
| Size | 5 MB | 3 MB |
| Requires iOS | 17.0 | 17 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | +9 |
| Developer | [Seth Farrington18896201822](https://appshunter.io/developer/1803242963) | [贺 周](https://appshunter.io/developer/1815397078) |

## What reviewers say

### CryptKB

[App page](https://appshunter.io/ios/app/cryptkb/id6761269767)

Encrypt messages and files locally on your device before sending. Use a custom keyboard or Messages extension to easily encrypt and decrypt content with a password. Your data remains private with no account creation or backend servers.

**Highlights:** Local encryption/decryption, Custom keyboard integration, Messages extension, AES-256-GCM encryption, ASCII-safe payload, Password saving with Face ID/passcode

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

**In-app purchases:** none


### NotiZen Pro

[App page](https://appshunter.io/ios/app/notizen-pro/id6762554707)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| NotiZen Pro Monthly | $2.99 | per month |
| NotiZen Pro Yearly | $19.99 | per year |
| NotiZen Pro Lifetime | $49.99 | one-time |


## Frequently asked questions

### Is CryptKB free?

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

### Is NotiZen Pro free?

NotiZen Pro costs $10.49, and also offers in-app purchases.

### Do CryptKB or NotiZen Pro have ads?

Neither CryptKB nor NotiZen Pro shows ads.

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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.*