Comparison

0Day vs Cyphir

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

0Day

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
Read full description

Most security feeds bury you in CVEs that have nothing to do with what you ship. 0Day cuts through that. Zero-days, supply chain attacks, compromised packages, active exploits: filtered to your exact stack, the moment they break. Pick your stack once during onboarding: npm, PyPI, Docker, Kubernetes, React, Rails, OpenSSL, whatever you use and the feed shows you only what touches your tech. No noise. No irrelevant advisories. Just what matters to you. The goal is lead time. Know about a compromised package, a poisoned build pipeline, or an actively exploited CVE before it reaches your CI, your production deployment, or your customers. Before the news cycle. Before the stragglers patch. Before you're the one scrambling at 2am. WHY 0DAY - Privacy-first — no analytics, no tracking, no third-party SDKs - Early warnings before the news cycle — the moment a threat breaks, you know - Stack-aware filtering — see only threats that hit the tools you use - Multi-source corroboration — duplicates merged, sources ranked by tier - Curated, not firehose — every alert is tied to a specific component - Full archive — searchable history of every threat that hit your stack HOW IT WORKS Every item in the feed goes through a three-stage lifecycle so you can tell the difference between "we're watching this" and "this is real, act now": CANDIDATE — A single source has reported an incident. In the pipeline, being correlated, not yet corroborated. EARLY WARNING — Either an authoritative research outlet flagged it, or a second independent source has confirmed the same incident. Pushed to your device immediately — this is the lead time the product is built for. CONFIRMED — Two or more authoritative sources agree, or three independent sources total. High-confidence state you can act on without double-checking. INSIDE THE FEED Each alert gives you a plain-English summary, affected components with version ranges, recommended action, CVE and GHSA identifiers with tappable links to the upstream advisories, and a timeline of when each source reported the incident. PRIVACY We collect only what we need to run the service: your email for sign-in, your stack selections, your notification preferences, and your device token for push delivery. No analytics. No crash reporting SDKs. No advertising identifiers. No cross-app tracking. All data is stored in the European Union on AWS infrastructure. You can delete your account and all associated data instantly from Settings. SUBSCRIPTION 0Day Pro unlocks the full experience: early warning alerts, push notifications, full archive access, remediation guidance, and stack filtering. All new users get a free 14-day trial — no payment required to get started. After the trial, subscribe to keep full access. Offered as a monthly or annual subscription. Payment is charged to your Apple ID at confirmation of purchase. Subscription auto-renews unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in iOS Settings → Apple ID → Subscriptions. Terms of Use: https://0day.lous.nl/terms Privacy Policy: https://0day.lous.nl/privacy

About

Cyphir

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
Read full description

Cyphir turns your iPhone into a control surface for AI coding agents running on your Mac or PC. Start sessions, send instructions, monitor activity, and stay close to your AI-assisted development work even when you are away from your desk. CONTROL YOUR AI WORKFLOW Cyphir lets you connect your phone to supported coding-agent sessions on your computer through the Cyphir bridge. From your iPhone, you can send commands, follow session activity, and keep visibility into what is happening on your machine. BUILT FOR AI CODING AGENTS Cyphir is designed for developers, builders, and power users who run tools like Claude Code, Codex, and other local AI-assisted coding workflows. Your computer runs the agent. Your phone becomes the command and review layer. REMOTE SESSION VISIBILITY Follow active sessions from your phone, review recent activity, and keep track of agent work while you move between your desk, laptop, and mobile device. PAIR YOUR COMPUTER SECURELY Install the Cyphir bridge on your Mac or PC, pair it with your iPhone, and connect through Cyphir’s relay infrastructure. Pairing is tied to your account and device flow so you can manage access from the app. APPROVAL-FOCUSED CONTROL Cyphir is built around visibility and control. Supported approval and review flows help you understand what your agent is doing and reduce the chance of unattended work moving forward without your awareness. PRIVACY-CONSCIOUS BY DESIGN Cyphir is designed to avoid unnecessary exposure of sensitive workflow data. Authentication, pairing, local device storage, session cleanup, and relay behavior are built with security and privacy in mind. HOW IT WORKS 1. Install the Cyphir bridge on the computer where your AI coding agent runs. 2. Pair your iPhone using the Cyphir app. 3. Start or monitor supported sessions from your phone. 4. Review activity and stay in control while your agent works. WHAT YOU CAN DO • Connect your iPhone to supported AI coding workflows on your computer • Start and monitor coding-agent sessions • Send natural-language instructions • Review supported session activity from your phone • Use account-based pairing and bridge connection flows • Manage your mobile session state securely • Keep your AI coding workflow close, even when you step away from your desk WHO CYPHIR IS FOR Cyphir is for developers, founders, technical operators, and AI power users who want mobile visibility and control over their AI coding workflows. REQUIREMENTS Cyphir requires the Cyphir bridge to be installed on the Mac or PC you want to connect. Supported AI coding tools must be installed and configured separately on that computer. A Cyphir subscription may be required after the free trial.

Screenshots

0Day4 screens
Cyphir4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard2 real differences · 8 level
0Day versus Cyphir: the parameters behind the verdict, then further details
Parameter0DayCyphir
PriceFreeFree
Rating5.0 (2 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings2 — better1
Update frequencyEvery 5 daysEvery 3 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFreemium
DevicesiPhoneiPhone, iPod — better
Requires iOS18.015.1 — better
Further details — not scored
Size10 MB27 MB
Age rating4+4+
DeveloperRichard LousVeridian Software LLC

Customer experience

0Day

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Cyphir

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

0Day

Subscriptions2
  • 0Day Pro7 Days trial$3.991 Month
  • 0Day Pro1 Month trial$29.991 Year
None

Cyphir

No in-app purchases

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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