0Day vs Shepherd
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Zero-day vulnerability alerts
- Supply chain attack notifications
- Compromised package warnings
- Stack-aware filtering
- Early warning system
- Push notifications
- Full alert archive
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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
Shepherd
Control AI coding agents running on your server from your iPhone. Monitor their progress, receive notifications, and interact directly. It also functions as a powerful SSH client with customizable shortcuts and themes.
- Live Activity for agent status
- Agent notifications
- SSH client with saved connections
- Customizable shortcut groups
- 500+ terminal themes
- Face ID protected private keys
- Ghostty terminal emulation
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Mochi is the place to control your AI coding agents from your iPhone. The agents run in herdr on your server. Mochi shows what each one is doing and takes you to it when it needs you. CONTROL YOUR AGENTS WITH HERDR • Live Activity on the lock screen: which agents are working and which are waiting for you • A notification when an agent is blocked or done, even when Mochi is closed • Tap it to open that agent's pane and answer from the chat input • Swipe to switch herdr tabs A REAL TERMINAL UNDERNEATH Mochi is a fast, beautiful SSH client built on the Ghostty terminal engine — a real terminal emulator in your pocket, not a toy. SSH INTO ANY SERVER Save your connections and jump into any of them in a tap. Password and key auth, custom ports, works great over Tailscale. FIRE COMMANDS IN ONE TAP Build your own shortcut groups: tmux prefixes, Ctrl combos, slash commands, whole snippets with Enter. The keyboard toolbar puts esc, tab, ctrl and ⌘ right above the keys — no more fighting the mobile keyboard. MAKE IT YOURS 500+ built-in terminal themes with search and light/dark filters. Real monospace fonts (JetBrains Mono and more), adjustable size, pinch to zoom in session. LOCK KEYS BEHIND FACE ID Private keys live in the iOS Keychain. Flip one switch and every use of a key requires Face ID. BUILT FOR ENGINEERS • Ghostty-powered terminal emulation — fast, correct, modern • Multiple simultaneous sessions • Native iOS design that feels at home on iOS 26 • No accounts, no tracking — your servers are your business SHEPHERD PRO An optional auto-renewing subscription (monthly or yearly): Agent view on tmux, Rex and herdr-core, and Files. Payment is charged to your Apple ID and renews unless cancelled at least 24 hours before the end of the period. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://shepherd.freethinkel.dev/phone/#privacy
Screenshots
Verdict
The clearest difference is chart position: 0Day at #195 against Shepherd's unranked. Shepherd's advantage is iOS requirement (16.0 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
Both are free to download. 0Day sells 2 in-app purchases, starting at $3.99 per month and Shepherd sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 5.0 for 0Day against 5.0 for Shepherd. Both are backed by a comparable volume of ratings — 2 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
0Day ships an update every 5 days, Shepherd weekly. The most recent releases landed on November 5, 2026 and November 11, 2026 respectively.
| Parameter | 0Day | Shepherd |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) | 5.0 (3 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 2 | 3 — better |
| Update frequency | Every 5 days — better | Weekly |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Freemium |
| Best chart rank | #195 — better | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 18.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 10 MB | 70 MB |
| Age rating | 4+ | 4+ |
| Developer | Richard Lous | Egor Kolesnikov |
Customer experience
0Day
Shepherd
In-app purchases
0Day
- 0Day Pro7 Days trial$3.991 Month
- 0Day Pro1 Month trial$29.991 Year
Shepherd
- Shepherd Pro$2.991 Month
- Shepherd Pro7 Days trial$19.991 Year









