# 0Day vs Cyphir

The clearest difference is in-app purchases: Cyphir at none against 0Day's 2. Cyphir also leads on iOS requirement (15.1 vs 18.0). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. 0Day sells 2 in-app purchases, starting at $3.99 per month. Cyphir asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for 0Day against 5.0 for Cyphir. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

0Day ships an update every 5 days, Cyphir every 3 days. The most recent releases landed on October 22, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | 0Day | Cyphir |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/0day-cve-and-exploit-alerts/id6761655372/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/cyphir/id6764655549/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 days | **Every 3 days** |
| Monetization | Freemium | Freemium |
| Size | 10 MB | 27 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Richard Lous](https://appshunter.io/developer/1890695617) | [Veridian Software LLC](https://appshunter.io/developer/1895866732) |

## What reviewers say

### 0Day

[App page](https://appshunter.io/ios/app/0day-cve-and-exploit-alerts/id6761655372)

Receive immediate alerts for zero-day vulnerabilities, supply chain attacks, and compromised packages relevant to your specific technology stack. Get early warnings before they hit the news cycle, enabling proactive security measures.

**Highlights:** Zero-day vulnerability alerts, Supply chain attack notifications, Compromised package warnings, Stack-aware filtering, Early warning system, Push notifications, Full alert archive

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 0Day Pro | $3.99 | per month |
| 0Day Pro | $29.99 | per year |


### Cyphir

[App page](https://appshunter.io/ios/app/cyphir/id6764655549)

Control AI agents running on your computer directly from your iPhone. Send commands, monitor their actions in real-time, and interrupt sessions from anywhere. Ensures privacy with end-to-end encryption.

**Highlights:** Remote AI agent command, Real-time tool use monitoring, Session interruption, End-to-end encryption, Multi-machine support, Live command streaming

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

**In-app purchases:** none


## Frequently asked questions

### Is 0Day free?

0Day is free to download, with in-app purchases available.

### Is Cyphir free?

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

### Which has better reviews, 0Day or Cyphir?

0Day and Cyphir are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do 0Day or Cyphir have ads?

Neither 0Day nor Cyphir shows ads.

### Which is updated more often, 0Day or Cyphir?

0Day ships an update every 5 days, and Cyphir every 3 days. Most recently, 0Day was updated on October 22, 2026 and Cyphir on October 8, 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.*