# 0Day vs ByteSniffer

The clearest difference is review sentiment: 0Day at 100% against ByteSniffer's 50%. ByteSniffer's advantage is device support (3 vs 1) and iOS requirement (15.6 vs 18.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. 0Day sells 2 in-app purchases, starting at $3.99 per month and ByteSniffer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

0Day ships an update every 5 days, ByteSniffer every 8 days. The most recent releases landed on November 5, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | 0Day | ByteSniffer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/0day-cve-and-exploit-alerts/id6761655372/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | **100.0% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 8 days |
| Monetization | Freemium | Freemium |
| Best chart rank | #195 | **#191** |
| Size | 10 MB | 22 MB |
| Requires iOS | 18.0 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Richard Lous](https://appshunter.io/developer/1890695617) | [存龙 霍](https://appshunter.io/developer/1442030835) |

## What reviewers say

### 0Day

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

**Currently charting:** #195 Top Grossing · Developer Tools (US App Store)

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 |


### ByteSniffer

[App page](https://appshunter.io/ios/app/bytesniffer/id6768570500)

**Currently charting:** #191 Top Grossing · Developer Tools (US App Store)

This tool allows developers to capture, inspect, and modify network traffic on their mobile devices. It enables debugging, API testing, and troubleshooting by providing features like request rewriting, session history, and scripting.

**Highlights:** HTTP capture and session history, Request and response inspection, Request and response rewrite tools, JavaScript scripting support, HTTPS MITM debugging, API debugging and testing

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Permanent Pember | $2.99 | one-time |


## Frequently asked questions

### Is 0Day free?

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

### Is ByteSniffer free?

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

### Do 0Day or ByteSniffer have ads?

Neither 0Day nor ByteSniffer shows ads.

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

0Day ships an update every 5 days, and ByteSniffer every 8 days. Most recently, 0Day was updated on November 5, 2026 and ByteSniffer on November 9, 2026.

### Which is more popular, 0Day or ByteSniffer?

0Day currently peaks at #195 in the App Store charts, and ByteSniffer at #191. Chart position reflects recent download velocity rather than total install base.

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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.*