# Shadow Security vs Kurir Email

The clearest difference is update cadence: Kurir Email at every 3 days against Shadow Security's every 5 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Shadow Security sells 1 in-app purchase, starting at $0.99 per month and Kurir Email sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Shadow Security ships an update every 5 months, Kurir Email every 3 days. The most recent releases landed on November 9, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Shadow Security | Kurir Email |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 days** |
| Size | 5 MB | 58 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Stephen Luadzers](https://appshunter.io/developer/1867049030) | [Arvidson Tech AB](https://appshunter.io/developer/1466655797) |

## What reviewers say

### Shadow Security

[App page](https://appshunter.io/ios/app/shadow-security/id6759615832)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Shadow Security Monthly | $0.99 | per month |


### Kurir Email

[App page](https://appshunter.io/ios/app/kurir-email/id6795541775)

**Features:** Vision Pro support, iPhone Duo support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kurir, monthly | $1.99 | per month |
| Kurir, yearly | $11.99 | per year |


## Frequently asked questions

### Is Shadow Security free?

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

### Is Kurir Email free?

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

### Do Shadow Security or Kurir Email have ads?

Neither Shadow Security nor Kurir Email shows ads.

### Which is updated more often, Shadow Security or Kurir Email?

Shadow Security ships an update every 5 months, and Kurir Email every 3 days. Most recently, Shadow Security was updated on November 9, 2026 and Kurir Email on November 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.*