# Arca by Privacy Everywhere vs Onsight Flow

The clearest difference is update cadence: Arca by Privacy Everywhere at weekly against Onsight Flow's every 4 months. Onsight Flow's advantage is iOS requirement (12.0 vs 15.0). 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.

Arca by Privacy Everywhere ships an update weekly, Onsight Flow every 4 months. The most recent releases landed on October 5, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Arca by Privacy Everywhere | Onsight Flow |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 4 months |
| Monetization | Free | — |
| Size | 38 MB | 77 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Privacy Everywhere ApS](https://appshunter.io/developer/1429670189) | [Librestream Technologies Inc.](https://appshunter.io/developer/549869787) |

## 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


### Onsight Flow

[App page](https://appshunter.io/ios/app/onsight-flow/id1510033890)

**In-app purchases:** none


## Frequently asked questions

### Is Arca by Privacy Everywhere free?

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

### Is Onsight Flow free?

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

### Do Arca by Privacy Everywhere or Onsight Flow have ads?

Neither Arca by Privacy Everywhere nor Onsight Flow shows ads.

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

Arca by Privacy Everywhere ships an update weekly, and Onsight Flow every 4 months. Most recently, Arca by Privacy Everywhere was updated on October 5, 2026 and Onsight Flow 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.*