Circuit Resistance Creator vs SpeedMark

Features: - Designed for students, technicians and engineers. - Find Equivalent Resistance for any resistor circuit. - Great Engineering tool. - Great for checking homework. - Super accurate with 6 decimal voltage, current and ohms displays. - Apply any circuit voltage from 1 to 1000 volts, with 3 decimal accuracy. - FREE and NO ADVERTISEMENTS.

Know the limit. Stay ahead of it. A few miles over is all it takes — a ticket, a higher premium, or worse. SpeedMark helps you catch it before it happens, protecting every drive. Real-Time Speed Limits & Alerts SpeedMark displays the current speed limit while you drive and alerts you the moment you exceed it — the speedometer turns red, with an optional sound. You choose how early it warns you: at the limit, 5%, 10%, or 20% over. Guardian Alerts — Optional Invite up to 3 people you trust. They get a simple alert if you drive well over the limit — no continuous location sharing, no tracking, no stats. Safety, not surveillance. Every Drive, Auto-Recorded SpeedMark runs in the background and tracks every drive automatically, saving a GPS-verified record of the last 2 minutes — speed, route, and timing. Replay any session on a map, or export it as a report with a speed graph. Recordings are cryptographically signed on your device, so they can be verified as unaltered. Private by Design Your driving data stays on your phone — we never see it, and your drives are never uploaded. No account needed to track, record, or export — only Guardian Alerts use Sign in with Apple, to connect you with the people you invite. Sessions auto-delete after 24 hours unless you save them. You decide what to keep. A Verified Record, If Needed SpeedMark keeps a verified record of the last 2 minutes of each drive, signed on your device. Replay it on a map or export it as a report if you ever need it. Key Features With the Full plan: - Real-time speed limit display - Instant over-limit alerts — speedometer turns red, optional sound - Adjustable alert sensitivity: at the limit, 5%, 10%, or 20% over - Guardian Alerts to up to 3 trusted people — no location sharing In every plan: - Automatic background drive recording - Session replay on an interactive map - Export to PDF, CSV, or GPX - Cryptographic verification of all recordings - 24-hour auto-delete, all data stored locally - No account required Subscription Options Lite — Speed Tracking: - Individual: $3.99/month or $34.99/year - Family (up to 6): $6.99/month or $59.99/year - Automatic drive recording, replay, and export Full — Speed Tracking + Speed Limits + Guardian Alerts: - Individual: $5.99/month or $49.99/year - Everything in Lite, plus real-time speed limits, instant alerts, and Guardian Alerts - Family plan coming soon Guardian — Free: - Accept an invitation from a driver and receive their speed alerts. No subscription required. 7-day free trial on paid plans. Cancel anytime. Family plans shared via Apple Family Sharing. Built by Drivers, for Drivers We built SpeedMark for the person behind the wheel — to help you drive a little safer, keep the people who care about you in the loop on your terms, and have a verified record if you ever need one. All without handing your location to anyone. Support & Legal Customer Support: support@speedmark.app Privacy Policy: https://speedmark.app/privacy SpeedMark is an independent app that provides advisory speed-limit alerts; it is not a certified in-vehicle ISA system.