# TachoSpeed — Classic-car GPS tach & speedo > GPS tachometer and speedometer for classic cars with non-working speedometers. (iPhone/iPad app by Skunk River Restorations, LLC.) - Source: https://appshunter.io/ios/app/tachospeed/id6771848185 (this page in markdown: same URL + `.md`) - Developer: [Skunk River Restorations, LLC](https://appshunter.io/developer/1895639103) - Category: Utilities, Lifestyle - Price: $0.99 - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 17.0 · 4 MB - Languages: American English - Released: 2026-05-26 - Data updated: 2026-09-04 - Monetization: paid ## What is TachoSpeed? TachoSpeed is a standalone GPS tachometer and speedometer for vehicles whose speedometer doesn't work but whose tachometer does — classic cars, restorations, project cars, anything with a working dash tach but a stuck or missing speedo. You calibrate once. Pick a cruising gear, settle at a steady speed, read the exact RPM off your dash tachometer, and tap to log. That single point is enough — because gear ratios are linear within a gear, TachoSpeed can derive your engine RPM from any future GPS speed. From then on, you get a live analog tachometer dial with: • An RPM scale around the outer ring with adjustable max and redline • A matching road-speed scale on the inner ring, so a single needle reads both at once • Current GPS speed shown as a large digital readout in the lower wedge of the dial The RPM dial is accurate in the gear you calibrated. The digital GPS speed is accurate in any gear — including downshifts, neutral, and the moments between shifts. No OBD-II adapter. No cables. No accounts. No ads. No tracking. TachoSpeed makes no network requests of any kind — your GPS speed is read from the phone's location services and processed entirely on-device. Nothing leaves your phone. KEY FEATURES • Live analog tachometer dial driven by your phone's GPS • One-time calibration in any gear of your choice; recalibrate any time • Adjustable dial maximum from 4,000 to 12,000 RPM and adjustable redline • MPH or KM/H, your choice — both scales update instantly • Screen stays awake on the tachometer view • Built-in safety notice — please don't operate the app while driving; mount your phone or have a passenger hold it • Universal app — iPhone and iPad, plus "Designed for iPad" on Apple Silicon Macs BUILT FOR Classic-car owners. Vintage motorcyclists (use it as a passenger). Restoration shops. Track-day drivers running cars where the original Smiths or Stewart-Warner speedometer cable finally gave up. Anyone whose dash speedo reads zero but whose tach still works. TachoSpeed is published by Skunk River Restorations, the same team behind LastDrive and Fuel Pre-Pay Estimator. ## Key features - GPS-driven analog tachometer dial - One-time calibration for RPM accuracy - Adjustable RPM scale and redline - MPH or KM/H display - Screen stays awake - On-device processing, no network requests ## Is TachoSpeed safe? Not enough ratings yet to assess TachoSpeed. ## Is TachoSpeed legit? TachoSpeed appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for TachoSpeed is 65 out of 100 points across 7 verification signals from App Store and developer data. ## Frequently asked questions about TachoSpeed ### What is TachoSpeed? TachoSpeed is a standalone GPS tachometer and speedometer designed for vehicles, particularly classic cars, where the original speedometer is not functioning but the tachometer is. It uses your phone's GPS to calculate and display engine RPM and road speed. ### How do I calibrate TachoSpeed? Calibration is a one-time process. You select a cruising gear, maintain a steady speed, note your dash tachometer's RPM, and tap to log this point. TachoSpeed then uses this data to derive your engine RPM from any future GPS speed. ### Does TachoSpeed work in all gears? The RPM dial is accurate in the gear you calibrated. However, the digital GPS speed readout is accurate in any gear, including during downshifts, neutral, and between gear changes. ### What units does TachoSpeed support? TachoSpeed supports both MPH and KM/H. Both scales update instantly, allowing you to choose your preferred unit of measurement. ### Does TachoSpeed require an internet connection? No, TachoSpeed does not require an internet connection. It makes no network requests and processes all GPS speed data entirely on-device for privacy and offline functionality. ### What is the price of TachoSpeed? TachoSpeed is a paid application, available for $0.99. This one-time purchase grants you access to all its features without any additional in-app purchases or subscriptions. ### Does TachoSpeed have ads? No, TachoSpeed is completely ad-free. The app description explicitly states 'No ads. No tracking,' ensuring an uninterrupted user experience. ### What devices is TachoSpeed compatible with? TachoSpeed is a universal app compatible with both iPhone and iPad. It is also 'Designed for iPad' on Apple Silicon Macs, offering broad platform support. ## Version history (last 1 release) ### 1.0 — 2026-05-26 No release notes. ## More apps by Skunk River Restorations, LLC - [LastDrive Garage](https://appshunter.io/ios/app/lastdrive-garage/id6764099935) - [Fuel Pre-Pay Estimator](https://appshunter.io/ios/app/fuel-pre-pay-estimator/id6769810021) - [RaceCarLogBook](https://appshunter.io/ios/app/racecarlogbook/id6773467838) - [DynoGearRatio](https://appshunter.io/ios/app/dynogearratio/id6787755963) - [SUTuner](https://appshunter.io/ios/app/sutuner/id6801878820) All apps by Skunk River Restorations, LLC: https://appshunter.io/developer/1895639103 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-04.*