Comparison

Ferret OSINT vs mailin

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

Head to head
About

Ferret OSINT

Features
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Ferret OSINT brings essential open-source intelligence tools to iPhone for fast, focused technical investigation. Built for mobile workflows, it helps you analyze public domain and footprint data without unnecessary complexity. Your results stay under your control. Ferret OSINT stores all data locally on your device with AES-256 encryption, avoids third-party storage, and uses open, transparent methods based on publicly available sources. Core features: DNS Lookup — Review DNS records grouped for faster analysis of domain infrastructure. WHOIS — Check public registration details, registrar information, and key domain dates where available. Subdomain Discovery — Identify related subdomains to expand visibility into a target's public-facing surface. Public Email Discovery — Find publicly exposed email addresses from open sources using non-intrusive methods. Shodan Integration — Export subdomain results directly to Shodan. Select multiple targets and send them as a batch for deeper infrastructure analysis. Core features: DNS Lookup — Review DNS records grouped for faster analysis of domain infrastructure. WHOIS — Check public registration details, registrar information, and key domain dates where available. Subdomain Discovery — Identify related subdomains to expand visibility into a target's public-facing surface. Public Email Discovery — Find publicly exposed email addresses from open sources using non-intrusive methods. Shodan Integration — Export subdomain results directly to Shodan. Select multiple targets and send them as a batch for deeper infrastructure analysis. Export and share: Long-press any result to share or copy it via the iOS share sheet. Works for DNS, WHOIS, subdomain, and email results. Built for practical investigation: Optimized for iPhone. Clear interface for rapid lookups and structured review. No login, no external account, and no background tracking. Shodan API key stored encrypted on device. (Shodan integration requires the user's own Shodan API key. No keys are provided by the developer) Useful for analysts, incident responders, penetration testers, and OSINT practitioners. Ferret OSINT is designed for lawful security research, digital footprint analysis, and technical investigation using public sources. Whether you are reviewing DNS records, checking WHOIS data, mapping subdomains, identifying public contact indicators, or pivoting to Shodan for deeper analysis, Ferret OSINT gives you a lightweight mobile toolkit for focused OSINT work.

About

mailin

Features
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mailin is a private email archive analyzer for Mac, iPhone and iPad. Open .mbox, .eml, .emlx, .msg, .pst, .ost, .nsf or .zip files from Gmail Takeout, Apple Mail, Thunderbird, Outlook or Lotus Notes — then search, analyze, recover and export your email history. Everything runs on your device. Nothing leaves it. THE ARCHIVE • On iPad: mailboxes, the list and the message side by side. On iPhone: a fast list with full search. • No built-in size limit: mail is streamed from disk. Checked on real mail files up to 1.5 GB. • Import queue with pause, resume and reorder, and a receipt for every import. SEARCH • Boolean AND / OR / NOT, "exact phrase", regex, NEAR proximity and relevance ranking. • Results say where they matched and how much of the archive was searched. • Finds words inside scanned PDFs and photos attached to emails, read on your device. FIND DELETED MAIL mailin marks mail that was deleted but is still inside your mailbox files, and says how each message was found. Deep recovery searches the free space of Outlook files for messages no folder lists any more. ON-DEVICE AI • Ask questions in plain language; every answer lists the emails it came from. Counts, dates and amounts are read from your archive by the app, not written by the model. • Summaries, digests, sentiment, topics, language detection, priority scoring, anomaly detection. • Runs with Apple's on-device models. No cloud AI. LEGAL & FORENSIC • Custodians, legal holds, chain of custody, tamper-evident audit log, review batches, predictive coding, redaction. • SPF, DKIM, DMARC and ARC checks, S/MIME, hidden header timestamps. • Review Packs and team cases with signed logs and second-level review — reviewers need no purchase. • Scripts and Shortcuts actions that tag, hold, number and export emails after a dry run. PRIVATE No account, no tracking, no telemetry. The app has no network access; your archive is a folder you own. Biometric lock available. Interface in 11 languages. PLANS • Free: the newest 500 emails of your archive, with search, analytics and a daily allowance of AI questions. • Personal: the whole archive, unlimited exports, the AI assistant, deleted-mail recovery. • Professional: adds the legal, forensic, review, scripting and deep-recovery tools. SUBSCRIPTIONS mailin Personal and mailin Professional are available as auto-renewable subscriptions (1 month or 1 year) or as a one-time lifetime purchase. Prices are shown in the app in your local currency. Payment is charged to your Apple Account when you confirm the purchase. A subscription renews automatically unless it is cancelled at least 24 hours before the end of the current period; your account is charged for renewal within 24 hours before the period ends. Manage or cancel subscriptions in your Apple Account settings at any time. Terms of Use: https://sasmalgiri.github.io/mailin/terms Privacy Policy: https://sasmalgiri.github.io/mailin/privacy DISCLAIMER mailin is not a certified forensic tool and does not give legal advice. AI analysis, deleted-mail recovery, text read from scanned attachments, header timestamps and signature checks can be incomplete or wrong; verify results independently before relying on them in legal or business decisions. Outlook is a trademark of Microsoft Corporation. mailin is not affiliated with Microsoft. mailin augments your judgment; it does not make legal determinations for you. All software, including AI features, can produce inaccurate or incomplete results — always verify important outputs before relying on them. Forensic features (chain-of-custody, Bates numbering, signed exports, HMAC-chained audit logs) support common forensic and eDiscovery workflows, but the admissibility of digital evidence is jurisdiction-specific. Consult qualified legal counsel for evidentiary use. mailin makes no warranty of fitness for any specific legal or regulatory purpose.

Screenshots

Ferret OSINT4 screens
mailin4 screens

Verdict

The call

The clearest difference is in-app purchases: Ferret OSINT at none against mailin's 4. Ferret OSINT also leads on iOS requirement (15.0 vs 17.6). On price, update cadence, ads and device support there is nothing between them.

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

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. mailin sells 4 in-app purchases, starting at $4.99 per month. Ferret OSINT asks for nothing beyond the download.

UpkeepUpdate frequency

Ferret OSINT ships an update every 3 months, mailin every 2 months. Both last shipped on October 31, 2026.

Scorecard2 real differences Ā· 4 level
Ferret OSINT versus mailin: the parameters behind the verdict, then further details
ParameterFerret OSINTmailin
PriceFreeFree
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS15.0 — better17.6
Further details — not scored
Size20 MB37 MB
Age rating4+4+
DeveloperKonstantin ShvetsovShrabani Sasmal

In-app purchases

None

Ferret OSINT

No in-app purchases

4 purchases

mailin

Subscriptions4
  • mailin personal monthly$4.991 Month
  • mailin professional monthly$9.991 Month
  • personal yearly 01$44.991 Year
Show 1 more
  • mailin professional yearly$79.991 Year

Questions

Is Ferret OSINT free?
Ferret OSINT is free to download, with no in-app purchases.
Is mailin free?
mailin is free to download, with in-app purchases available.
Do Ferret OSINT or mailin have ads?
Neither Ferret OSINT nor mailin shows ads.
Which is updated more often, Ferret OSINT or mailin?
Ferret OSINT ships an update every 3 months, and mailin every 2 months. Most recently, Ferret OSINT was updated on October 31, 2026 and mailin on October 31, 2026.

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