Cert Recon vs Spoolwright

Cert Recon reads the TLS certificate chain a server presents and explains it in plain language: who issued it, when it expires, which names it covers, and whether this device trusts it. It also answers a question most computers cannot. Your phone holds two independent paths to the internet at once. Cert Recon asks the same host over Wi-Fi and over cellular and compares the answers, because a network that intercepts TLS has to re-sign the connection with its own certificate authority. The cellular path shows you what the certificate should have been. Hotel, airport, conference and corporate guest networks do this routinely. On a device with one path, it still catches the common case: a certificate that this device trusts yet carries no Certificate Transparency timestamps is being vouched for by an authority installed on the device rather than a public one. That is how a filtering proxy works, and Cert Recon names the authority doing it. WHAT YOU GET • The full chain, leaf to root, exactly as the server presented it • Every field: subject, issuer, validity, key type and size, signature algorithm, serial, SANs with their types, key usage, extended key usage, basic constraints, certificate policies, OCSP and CRL URLs, CT timestamps • SHA-256, SHA-1 and public-key (SPKI) fingerprints • Trust evaluated against this device's store, with the reason it failed rather than a red cross • Expiry countdown, weak-key and weak-signature flags, hostname mismatch and self-signed detection • Interception check: Wi-Fi against cellular, issuer sanity, transparency timestamps, captive-portal awareness • Pin a host's key and be told if it changes • History of what you have inspected, one tap to run again • Export the chain as PEM or the finding as a text report • Configurable port and SNI • iPhone and iPad, dark-first PRIVACY Nothing leaves your device. No account, no analytics, no tracking, no third-party frameworks. Hostnames you inspect are not transmitted anywhere. Pinned hosts and history stay on the device. Cert Recon is a certificate inspector: it completes the TLS handshake, reads the certificate, and closes. It sends no request body and no HTTP to the host you name. FREE No in-app purchases, no subscription, no gated features. Part of the 404 Tools Recon suite; hand any host straight to the other Recon apps you have installed.

Spoolwright is a private 3D-printing spool desk for makers who want clear filament inventory, job cost, and depletion estimates without another cloud account. Add spools by material, color, grams remaining, cost, lot note, dryer status, and favorite settings. The workbench estimates whether a spool can finish a job, material cost, energy estimate, markup, and remaining grams after the run. A built-in reference library covers humidity, dry-box notes, material changes, nozzle settings, and recordkeeping habits. KEY FEATURES - Spool inventory by material and color - Print job material and cost estimates - Depletion forecast before a long run - Dryer and humidity log - Material settings reference cards - Local PDF print sheet - 60-card offline 3D printing reference library - No account, ads, tracking, analytics, subscription, or network requirement Spoolwright is an organizer and estimator based on values you enter. It does not connect to a printer, validate G-code, or replace manufacturer guidance.