# Arca by Privacy Everywhere vs Notebox

The clearest difference is review sentiment: Notebox at 86% against Arca by Privacy Everywhere's 0%. Notebox also leads on update cadence (every 2 days vs weekly). Arca by Privacy Everywhere's advantage is in-app purchases (none vs 2) and iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Notebox sells 2 in-app purchases, starting at $1.49 per month. Arca by Privacy Everywhere asks for nothing beyond the download.

Arca by Privacy Everywhere ships an update weekly, Notebox every 2 days. The most recent releases landed on October 5, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Arca by Privacy Everywhere | Notebox |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.3 (6 ratings)](https://appshunter.io/ios/app/notebox-encrypted/id1536532586/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | 0.0% of reviews | **85.7% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 2 days** |
| Monetization | **Free** | Freemium |
| Size | 38 MB | 49 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Privacy Everywhere ApS](https://appshunter.io/developer/1429670189) | [Guap Inc.](https://appshunter.io/developer/1439069409) |

## What reviewers say

### Arca by Privacy Everywhere

[App page](https://appshunter.io/ios/app/arca-by-privacy-everywhere/id1429670190)

This email client offers robust PGP encryption for secure communication. Your private keys are generated and stored locally on your device, ensuring they never leave. It seamlessly integrates with other PGP-compatible applications.

**Highlights:** PGP encryption, Local key generation, Private key security, Public key server storage, Compatibility with PGP Standard apps, Supports PGP/mime and old format

**In-app purchases:** none


### Notebox

[App page](https://appshunter.io/ios/app/notebox-encrypted/id1536532586)

This app offers a secure, block-based editor with Markdown support for local note-taking. For cross-device synchronization and real-time updates, a subscription unlocks cloud features with zero-knowledge encryption.

**Highlights:** Zero-knowledge encryption, Block-based editor, Markdown support, Local-only mode, Cross-device sync, Real-time updates

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Cloud Subscription | $1.49 | per month |
| Yearly Cloud Subscription | $14.99 | per year |


## Frequently asked questions

### Is Arca by Privacy Everywhere free?

Arca by Privacy Everywhere is free to download, with no in-app purchases.

### Is Notebox free?

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

### Do Arca by Privacy Everywhere or Notebox have ads?

Neither Arca by Privacy Everywhere nor Notebox shows ads.

### Which is updated more often, Arca by Privacy Everywhere or Notebox?

Arca by Privacy Everywhere ships an update weekly, and Notebox every 2 days. Most recently, Arca by Privacy Everywhere was updated on October 5, 2026 and Notebox on October 16, 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.*