USB-C Tester: Charger & Cable
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Everyone
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100+
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About this app
Find out why your phone charges slowly, which cable is throttling you, and exactly what your phone can do over USB-C.
USB-C Tester is a focused utility that combines the four checks every Android phone owner actually needs in one clean, ad-light app — without the fake "wattage" numbers, screen-spamming interstitials or paywall fragmentation you get elsewhere.
WHAT IT DOES
• Live charging meter — real-time voltage, current and battery-input wattage, with OEM-aware unit correction for Samsung, Xiaomi and Pixel quirks.
• 5-second charger test — a clean 0-100 verdict for any charger + cable combo. Save the result, name the cable, compare it next time.
• OTG check — confirms your phone supports USB-OTG, then verifies it actually works when you plug a real device in.
• DisplayPort Alt Mode check — finds out whether your USB-C port can drive an external monitor, and confirms it the second one is connected.
• Cable library — keep notes on every cable you own, tag them by colour, see at a glance which one charges fastest.
• Charging session history — full voltage / current / wattage curves over time so you can see thermal throttling and PD renegotiation in action.
• Charge alarm — get a notification when the battery hits 80% or 85% to extend long-term battery life.
• Live wattage widget — see your current charging speed without unlocking the phone.
HONEST ABOUT LIMITS
Android does not expose USB Power Delivery contract details to third-party apps without root. The wattage you see is measured at the battery, not the wall — typically 5-20% lower than the charger's wall rating because of conversion losses inside the phone. Anyone claiming to read true wall wattage on a stock Android phone is fudging the number. We label everything as "battery input power" so you always know exactly what you are looking at.
WORKS ON
Compatible with Samsung Galaxy S22 / S23 / S24 / S25, Google Pixel 8 / 9 / 10, OnePlus 11 / 12, Nothing Phone, Xiaomi 14, Motorola Edge, and most modern Android phones with USB-C running Android 9 (Pie) or newer. Works with Power Delivery, PPS, SuperVOOC, HyperCharge and other fast-charge protocols — wattage is reported as the phone reports it.
PRIVACY
USB-C Tester does not collect personal data. The app uses Google AdMob for advertising; AdMob may use a non-personalised advertising identifier subject to your Android privacy settings. No tracking, no analytics SDK chain.
WHY THIS APP
Built by a solo developer tired of charging-meter apps that spam interstitial ads, fake their wattage readings, or only do half the job. USB-C Tester does exactly what it says: measures what Android actually exposes, is upfront about the rest, and gets out of your way.
USB-C Tester is a focused utility that combines the four checks every Android phone owner actually needs in one clean, ad-light app — without the fake "wattage" numbers, screen-spamming interstitials or paywall fragmentation you get elsewhere.
WHAT IT DOES
• Live charging meter — real-time voltage, current and battery-input wattage, with OEM-aware unit correction for Samsung, Xiaomi and Pixel quirks.
• 5-second charger test — a clean 0-100 verdict for any charger + cable combo. Save the result, name the cable, compare it next time.
• OTG check — confirms your phone supports USB-OTG, then verifies it actually works when you plug a real device in.
• DisplayPort Alt Mode check — finds out whether your USB-C port can drive an external monitor, and confirms it the second one is connected.
• Cable library — keep notes on every cable you own, tag them by colour, see at a glance which one charges fastest.
• Charging session history — full voltage / current / wattage curves over time so you can see thermal throttling and PD renegotiation in action.
• Charge alarm — get a notification when the battery hits 80% or 85% to extend long-term battery life.
• Live wattage widget — see your current charging speed without unlocking the phone.
HONEST ABOUT LIMITS
Android does not expose USB Power Delivery contract details to third-party apps without root. The wattage you see is measured at the battery, not the wall — typically 5-20% lower than the charger's wall rating because of conversion losses inside the phone. Anyone claiming to read true wall wattage on a stock Android phone is fudging the number. We label everything as "battery input power" so you always know exactly what you are looking at.
WORKS ON
Compatible with Samsung Galaxy S22 / S23 / S24 / S25, Google Pixel 8 / 9 / 10, OnePlus 11 / 12, Nothing Phone, Xiaomi 14, Motorola Edge, and most modern Android phones with USB-C running Android 9 (Pie) or newer. Works with Power Delivery, PPS, SuperVOOC, HyperCharge and other fast-charge protocols — wattage is reported as the phone reports it.
PRIVACY
USB-C Tester does not collect personal data. The app uses Google AdMob for advertising; AdMob may use a non-personalised advertising identifier subject to your Android privacy settings. No tracking, no analytics SDK chain.
WHY THIS APP
Built by a solo developer tired of charging-meter apps that spam interstitial ads, fake their wattage readings, or only do half the job. USB-C Tester does exactly what it says: measures what Android actually exposes, is upfront about the rest, and gets out of your way.
Updated on
Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
What’s new
More accurate current and power readings across a much wider range of phones and chargers. Adds an in-app review option, a dedicated Settings screen, full translations for 18 languages, and stability improvements.
App support
About the developer
Nordic Node
info@nordicnode.nl
Zuidendijk 179
3314 CT Dordrecht
Netherlands
+31 6 40473615
