# Launchmeter: 0-60 Drag Timer — GPS Speedometer & G-Force Log > iPhone performance meter for car acceleration timing and G-force logging. (iPhone/iPad app by 耀民 王.) - Source: https://appshunter.io/ios/app/launchmeter-0-60-drag-timer/id6740311655 (this page in markdown: same URL + `.md`) - Developer: [耀民 王](https://appshunter.io/developer/1789459947) - Category: Utilities - Price: Free with in-app purchases - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 17.0 · 2 MB - Languages: American English, German (Germany), Japanese, Korean, Chinese (Simplified, China), Chinese (Traditional, Taiwan) - Released: 2025-01-12 - Data updated: 2026-09-30 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/launchmeter-0-60-drag-timer/id6740311655/reviews.md ## What is Launchmeter? Launchmeter turns your iPhone into a performance meter. Find a safe, open space and measure your car's 0-60 mph time with one tap. ACCELERATION TIMING & SPLITS • 3-second countdown, then timing starts automatically when you pull away • Time several runs at once — 0-30, 0-60 and 0-100 mph — and set your own targets • Every split is compared with your personal best: green when faster, red when slower GPS + MOTION-SENSOR FUSION • Speed fuses GPS with your iPhone's accelerometer and gyroscope: accurate GPS gets more weight, the sensors fill the gaps between fixes • The launch moment is detected by the accelerometer, so the start isn't delayed by GPS updates • Hand shakes and road bumps are filtered out, so readings stay steady EVERYTHING AT A GLANCE • Big three-digit speed and a segmented speed bar • Friction circle for longitudinal and lateral G, plus a live G-force trace • Grade meter — tap to zero • Local temperature, humidity and pressure from Apple Weather, plus your iPhone's barometer RUNS & ROUTES SAVED • Speed and G-force traces, splits and route are saved on your iPhone for every run • Drag across the charts to replay any moment • Routes keep recording with the screen locked LAUNCHMETER PRO (OPTIONAL, ONE-TIME PURCHASE) • Weather-corrected times: air density, density altitude and SAE J1349 correction so runs compare fairly across seasons and altitude • Export CSV data and GPX tracks • Share cards with your splits and speed trace • Multiple cars: log and compare runs per car Everything else stays free forever. PRIVACY Your runs stay on your iPhone and are never uploaded. Location is only used to measure speed, record routes and look up local weather. SAFETY Only test on closed courses or where it's safe and legal. Obey traffic laws and never use your phone while driving. Continuous GPS use during a run increases battery drain. Results depend on GPS signal and phone mounting and are for reference. ## Key features - 0-60 mph acceleration timing - GPS and motion sensor fusion for accuracy - G-force and friction circle logging - Run and route saving - Weather-corrected times (Pro) - CSV and GPX data export (Pro) ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Launchmeter Pro | $4.99 | one-time | ## Frequently asked questions about Launchmeter ### What is Launchmeter's primary function? Launchmeter turns your iPhone into a performance meter to measure your car's 0-60 mph time with a one-tap countdown. It also logs G-force and saves your runs and routes. ### How does Launchmeter ensure accurate speed readings? It uses a fusion of GPS data with your iPhone's accelerometer and gyroscope. The accelerometer detects the launch moment, while sensors fill gaps between GPS fixes for consistent readings. ### Can I track multiple cars with Launchmeter? Yes, the optional Launchmeter Pro upgrade allows you to log and compare runs for multiple cars, providing dedicated performance data for each vehicle. ### What kind of data can I export with Launchmeter Pro? Launchmeter Pro enables you to export your performance data as CSV files and your routes as GPX tracks, allowing for further analysis and sharing. ### Does Launchmeter have ads? No, Launchmeter is ad-free. The core functionality is free forever, with an optional one-time purchase for Pro features. ### Is Launchmeter available on Android devices? Based on the provided data, Launchmeter is currently only supported on iPhones. ### How often is Launchmeter updated? The app was last updated on September 29, 2026, indicating a recent update. The latest version is 1.3. ### What is the age rating for Launchmeter? Launchmeter has an age rating of 4+, making it suitable for a wide range of users. ## Version history (last 4 releases) ### 1.3 — 2026-09-29 • All-new telemetry-style dashboard: big speed, segmented speed bar and live splits vs. your best • Speed now fuses GPS with the accelerometer and gyroscope for more accurate launch timing • Filters out hand shakes and road bumps • New pull-up panel: G-force circle, grade, live trace, route and local weather • Now in English, 繁體中文, 日本語, 한국어 and Deutsch, with mph / km/h • New Launchmeter Pro (optional one-time purchase): weather-corrected times, export, share cards, multiple cars ### 1.2 — 2026-07-14 更新了logo、UI设计和图表显示 ### 1.1 — 2025-12-04 更新了UI，增加了G值显示 ### 1.0 — 2025-01-13 No release notes. ## More apps by 耀民 王 - [简记账](https://appshunter.io/ios/app/id6756019167) - [MealSight](https://appshunter.io/ios/app/mealsight/id6770763777) - [Barometer compass](https://appshunter.io/ios/app/barometer-compass/id6792526727) - [CurioSeed: How Things Work](https://appshunter.io/ios/app/curioseed-how-things-work/id6809521678) All apps by 耀民 王: https://appshunter.io/developer/1789459947 --- *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 2026-09-30.*