DNS Toolkit vs 0Day
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DNS Toolkit
This app offers a suite of DNS diagnostic tools for IT professionals and network administrators. It includes features for performing various DNS lookups, generating and checking SPF, DKIM, DMARC, and CAA records to enhance email security and domain validation.
- DIG command for versatile DNS lookups
- Reverse DNS lookups
- SPF record generator and checker
- DKIM record generator and checker
- DMARC record generator and checker
- CAA record generator and checker
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Unlock the full potential of DNS management with DNS Toolkit, a collection of DNS tools for IT professionals, network administrators, and enthusiasts. Whether you're troubleshooting DNS issues, validating configurations, or managing DNS records, DNS Toolkit provides all the essential features you need in one powerful app. Features: DIG Command: - Perform versatile DNS lookups for any record type (A, MX, TXT, etc.). - Retrieve detailed information about a domain's DNS configuration. Customize queries with various options and flags for in-depth analysis. Reverse Lookup: - Perform reverse DNS lookups to find the domain name associated with an IP address. SPF Generator and Checker: - Generate SPF (Sender Policy Framework) records to protect your domain from email spoofing. - Check existing SPF records to ensure they are correctly configured and meet best practices. DKIM Generator and Checker: - Create DKIM (DomainKeys Identified Mail) records to enhance your email security. - Validate existing DKIM records to ensure they are correctly implemented. DMARC Generator and Checker: - Generate DMARC (Domain-based Message Authentication, Reporting, and Conformance) records to improve your domain's email authentication. - Verify DMARC records to ensure compliance with email authentication standards. CAA Generator and Checker: - Generate CAA records for your favorite Certificate Authority - Check CAA records for given DNS names
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
Screenshots
Verdict
The clearest difference is price: 0Day at Free against DNS Toolkit's $1.99. 0Day also leads on chart position (#195 vs unranked). DNS Toolkit's advantage is in-app purchases (none vs 2) and device support (4 vs 1). On rating, review sentiment, ratings volume and ads 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
0Day is free to download; DNS Toolkit costs $1.99 up front. 0Day sells 2 in-app purchases, starting at $3.99 per month. DNS Toolkit asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for DNS Toolkit against 5.0 for 0Day. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
| Parameter | DNS Toolkit | 0Day |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 5.0 (2 ratings) | 5.0 (2 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 2 | 2 |
| Update frequency | — | Every 5 days |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Freemium — better |
| Best chart rank | — | #195 — better |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone |
| Requires iOS | 12.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 38 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Daniel Linsenmeier | Richard Lous |
Customer experience
DNS Toolkit
0Day
In-app purchases
DNS Toolkit
No in-app purchases
0Day
- 0Day Pro7 Days trial$3.991 Month
- 0Day Pro1 Month trial$29.991 Year









