# USB Connection Information — USB Speeds at a Glance > Verify USB and Lightning connection speeds, charging wattage, and device capabilities. (iPhone/iPad app by Daniel Gauthier.) - Source: https://appshunter.io/ios/app/usb-connection-information/id6747853674 (this page in markdown: same URL + `.md`) - Developer: [Daniel Gauthier](https://appshunter.io/developer/1563807345) - Category: Utilities, Lifestyle - Price: $9.99 - Rating: 5.00/5 from 3 App Store ratings · 24 written reviews indexed - Age rating: 4+ - Requires: iOS 17.0 · 4 MB - Languages: American English, Catalan, Danish, Dutch, French (France), German (Germany), Greek, Hindi, Italian, Japanese and 12 more - Released: 2025-06-27 - Data updated: 2026-08-30 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/usb-connection-information/id6747853674/reviews.md ## What is USB Connection Information? That "fast" charging cable might just be standard speed. Your expensive external SSD might be throttled by a bad cable. USB Connection Information helps you verify the real performance of your devices USB and lightning connections. STOP GUESSING. START KNOWING. Verify the actual transfer speeds of your connected external drives and estimate the real wattage reaching your battery. Perfect for anyone who's ever wondered "is this cable actually fast?" or "is this charger working properly?" CORE FEATURES - Data Speed Testing: Measure actual read and write speeds of external USB and Lightning drives to ensure your storage isn't bottlenecked. - Charging Speed & Voltage Fingerprinting: Calculate the actual wattage reaching your battery and use unique charging fingerprinting to estimate the specific USB-PD voltage rail (e.g., 5V, 9V, 15V) powering your device. - Charging Curve Logging: Chart your entire charging session to see how power delivery changes as the battery fills. - Device Capability Identification: See the exact maximum data speeds and charging wattage your specific iPhone or iPad model supports. - Detailed Drive Info: View connected volume names, file system formats, and total/available capacities. - Test History: Save and review past test results to compare different drives, cables, and chargers. BUILT FOR YOUR WORKFLOW - Simple, one-tap testing for both data speeds and charging rates. - Intelligent warnings to prevent testing internal storage by mistake or causing excessive drive wear. - Clear visualizations for your connection speed (e.g. USB 2.0 vs USB 3.0). EFFICIENT & PRIVATE Native SwiftUI app with minimal resource usage. Your data never leaves your device: no tracking, no telemetry, and no cloud sync. TECHNICAL NOTE Due to iOS system limitations, charging wattage is estimated by measuring battery percentage changes over time. This represents the actual power reaching the battery rather than the total charger output. For the most accurate results, run charging tests when your battery is between 20% and 50% and screen brightness is low. ## Key features - Data Speed Testing - Charging Speed & Voltage Fingerprinting - Charging Curve Logging - Device Capability Identification - Detailed Drive Info - Test History ## Recent user reviews (10 of 24) All indexed reviews: https://appshunter.io/ios/app/usb-connection-information/id6747853674/reviews.md ### 5/5 — Works as described *2026-07-08, version 26.1* Now I can test if my attached storage is working at USB 2.0 or USB 3.0 speeds. Thanks! I also like the image export option. ### 5/5 — 👍👍👍 *2026-07-01, version 26.0* I had no idea this was possible on the iPhone! Love this app, easy to use. Really cool to be able to run USB tests on iPhone. Worth the download ### 5/5 — Very Handy! *2026-04-28, version 26.29* Do you have a bunch of USB-C power bricks lying around, and you’re not sure which ones will supply enough power to quick charge your MBP? This is the app. Sure, you can look in system information every time you plug something in, but this is faster. ### 4/5 — why not a window? *2026-04-04, version 26.26* Does a great job at displaying all your devices’ connection speeds, but crams it all into a dropdown menu for some reason. This would be a much better fit for display in a window. ### 5/5 — Great :) *2026-04-04, version 26.26* Very useful. Sometimes when I connect my iPhone 16 pro max and my Samsung T9 SSD it only shows the slow speed for one of them like 480 so I need to verify using this app and make sure they both show 10 for the speed which is a fast USB 3 speed so if it’s not i just disconnect and reconnect. I use that especially with the great local backup program that backs up the iPhone to the mac called iMazing. It’s like Time Machine for the iPhone. it can do so much. ### 5/5 — Perfect for finding slow drives *2026-03-16* It took a few apps before I found the right one and I’m pretty happy with this one. Task bar drop down gives the full list of connected volumes and the speed they are connected at. This helps troubleshoot why copying files across different volumes can vary so much (480mbps vs 5gbps). Thankyou. **Developer response:** Thank you for the great review! I am glad the app is helping you easily spot those 480 Mbps bottlenecks among your connected volumes. I really appreciate you taking the time to share your experience and for choosing this as the best USB app! ### 5/5 — FINALLY! All the USBC Power Delivery info I’ve wanted! *2026-03-16, version 26.22* So many times I’ve just wanted to know what Voltage and Amperage the charger I’m connected to is capable of. Normally I’d have to remember to have my USBC PD Multimeter with me. THANK YOU SO MUCH. You are an International Treasure. ### 5/5 — Incredibly useful *2026-03-16* Finally I can know the charging speed of my cable without needed a tester. Love the app **Developer response:** I am glad to hear the app is saving you from having to dig out a hardware tester. Thank you for the wonderful review! ### 5/5 — Perfect utility *2025-12-09, version 26.4* I can finally see what my cables and chargers are actually doing. Fast updates, clear info, and lightweight. Totally worth it! ### 5/5 — Works perfectly fine *2025-11-24* No idea what these other people’s issues are, but this app works flawlessly. **Developer response:** I'm really glad you're finding the app useful. Feedback like this keeps me motivated. If you ever do have a feature request or question, please do not hesitate to reach out! ## Frequently asked questions about USB Connection Information ### What is USB Connection Information? USB Connection Information is a utility app that helps you verify the real performance of your USB and Lightning connections. It measures data transfer speeds and estimates charging wattage to ensure your devices and accessories are performing as expected. ### How much does USB Connection Information cost? USB Connection Information is a paid app priced at $9.99. This one-time purchase grants you access to all its features for verifying your device connections. ### Does USB Connection Information have ads? No, USB Connection Information does not contain advertisements. It is a paid application designed to be ad-free for a seamless user experience. ### What devices does USB Connection Information support? USB Connection Information is available for iPhone and Mac devices. It is designed to work with iOS and macOS operating systems. ### How accurate is the charging wattage estimation? Charging wattage is estimated by measuring battery percentage changes over time, representing the power reaching the battery. For best results, run tests when the battery is between 20%-50% and screen brightness is low. ### Can I test internal storage with USB Connection Information? No, the app includes intelligent warnings to prevent testing internal storage by mistake or causing excessive drive wear. It focuses on external USB and Lightning drives. ### How often is USB Connection Information updated? The latest version, 26.0, was released on June 29, 2026. Updates are provided by the developer, Daniel Gauthier, to ensure continued functionality and improvements. ### Is my data private with USB Connection Information? Yes, the app is designed to be private and efficient. Your data never leaves your device, with no tracking, telemetry, or cloud sync. ## Version history (last 3 releases) ### 26.2 — 2026-08-20 Minor bug fixes and performance improvements. ### 26.1 — 2026-07-02 Minor bug fixes and performance improvements. ### 26.0 — 2026-06-29 No release notes. ## More apps by Daniel Gauthier - [Meal37 - Weekly Meal Planner](https://appshunter.io/ios/app/meal37-weekly-meal-planner/id1564813061) - [Custom Word Clock - TextTime](https://appshunter.io/ios/app/custom-word-clock-texttime/id6449908609) - [Daily Persona: Today I Am](https://appshunter.io/ios/app/daily-persona-today-i-am/id6450616950) - [Imperfect Nostalgia - Travel](https://appshunter.io/ios/app/imperfect-nostalgia-travel/id6499503739) - [Life Badger - Achievement List](https://appshunter.io/ios/app/life-badger-achievement-list/id6502265931) - [Word Clock Pro - Text Time](https://appshunter.io/ios/app/word-clock-pro-text-time/id6504540811) All apps by Daniel Gauthier: https://appshunter.io/developer/1563807345 --- *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 2026-08-30.*