# WattMate: Charging Power Meter > Ampere & charging power meter: check watts, current, voltage & battery health Canonical page: [https://chrome-stats.com/d/com.nagy.wattmate](https://chrome-stats.com/d/com.nagy.wattmate) ## Overview - **ID:** `com.nagy.wattmate` - **Platform:** Android - **Type:** Android app - **Status:** Available - **Publisher:** nagyy - **Category:** TOOLS - **Downloads:** 698 - **Version:** 4.5 - **Last updated:** 2026-08-23 - **First published:** 2026-05-08 - **Publisher country:** EG - **Size:** 60 MB - **Data as of:** 2026-09-16 - **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.nagy.wattmate) - **Website:** [https://pd1bcf7f0.app-ads-txt.com/](https://pd1bcf7f0.app-ads-txt.com/) - **Privacy policy:** [https://nagy-legal.vercel.app/wattmate/privacy.html](https://nagy-legal.vercel.app/wattmate/privacy.html) ## Description WattMate is the ampere meter and charging meter that shows you exactly what's happening when your phone charges. See real charging power in Watts, live voltage, current, and temperature โ€” all updating in real time.

โšก CHARGING POWER METER
Know your actual charging wattage, not just a percentage bar.

- Live charging power display in Watts (W)
- Ampere meter: charging current in milliamps (mA)
- Battery voltage in volts (V)
- Charger test: find your fastest charger and USB cable combination
- See if your phone is fast charging or trickle charging
- Charge speed test to compare adapters, cables, and wireless chargers

๐ŸŒก TEMPERATURE & BATTERY HEALTH
Keep your battery healthy and out of the danger zone.

- Real-time battery temperature monitoring
- Battery health status (Good / Fair / Poor)
- Charging state: AC, USB, Wireless, or unplugged
- Temperature alerts to protect against overheating

๐Ÿ“Š LIVE GRAPHS
Watch your charging stats over time, not just a snapshot.

- Real-time power graph while charging
- Current and voltage trend over session
- Spot fluctuations caused by charger, cable, or background apps

๐Ÿ” WHAT AFFECTS YOUR CHARGE SPEED?
Your charging speed depends on many real-world factors:
- Charger type (AC adapter, USB-C, wireless)
- USB cable quality
- Phone model and chipset
- Apps running in the background
- Screen-on vs screen-off state
- Current battery level (charging slows near 100%)

WattMate reads directly from your device's battery controller for accurate, science-based readings โ€” no guesswork, no false claims.

WHY WATTS MATTER
Most ampere apps show you milliamps (mA). WattMate goes further: Power (W) = Voltage ร— Current. That means you see the true charging power, which is what actually determines how fast your battery fills up. A 5V/2A charger and a 9V/1.5A charger can both show ~2000mA but deliver very different charging speeds. WattMate shows you the difference.

๐Ÿงช BATTERY TESTER & CHARGER CHECKER
Use WattMate as a battery tester and charger checker:
- Test any charger or cable in seconds
- Compare charging speed between wall adapters
- Check if a cable is limiting your charge speed
- Verify wireless charger output

CLEAN & SIMPLE
No bloated features. No fake battery "cleaners" or "optimizers". WattMate does one thing: give you accurate, real-time charging and battery data that you can actually trust and act on.

Works on Android phones and tablets. Results depend on hardware support โ€” most modern Android devices are fully supported. ## Rankings - #1,272,984 โ€” Overall ## Permissions and access ### Permissions - `android.permission.ACCESS_ADSERVICES_AD_ID` - `android.permission.ACCESS_ADSERVICES_ATTRIBUTION` - `android.permission.ACCESS_ADSERVICES_TOPICS` - `android.permission.ACCESS_NETWORK_STATE` - `android.permission.FOREGROUND_SERVICE` - `android.permission.INTERNET` - `android.permission.READ_EXTERNAL_STORAGE` - `android.permission.WAKE_LOCK` - `android.permission.WRITE_EXTERNAL_STORAGE` - `com.android.vending.BILLING` - `com.android.vending.CHECK_LICENSE` - `com.google.android.gms.permission.AD_ID` - `com.nagy.wattmate.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION` ## Similar extensions and apps - [WattMeter: Battery & Charge](https://chrome-stats.com/d/com.sanghm.wattmeter) โ€” 611 users - [AmpereFlow: Battery Charging](https://chrome-stats.com/d/com.androxus.batterymeter) โ€” 8,425,531 users, 4.31 / 5 - [Charge Watt Meter & Ampere+](https://chrome-stats.com/d/com.charge.watt.meter) โ€” 11,420 users, 3.27 / 5 - [Charge Meter - Charging Speed](https://chrome-stats.com/d/com.chargemeter.rahat.app) โ€” 197 users - [Watt CS: Charging Speed Meter](https://chrome-stats.com/d/com.wattchargingspeeds) โ€” 19 users - [Ampere Meter: Charging Monitor](https://chrome-stats.com/d/com.brb.amperemeter.s) โ€” 143,068 users, 3.38 / 5 - [Charging Power: Ampere Meter](https://chrome-stats.com/d/vn.lecon.device.info) โ€” 37,988 users, 4.50 / 5 - [Charge Watt Meter](https://chrome-stats.com/d/net.metareverse.watt) โ€” 1,906 users - [WattFlow: Real Battery Power](https://chrome-stats.com/d/com.ezyapp.wattflow) โ€” 122 users - [Battery Meter](https://chrome-stats.com/d/com.ruralrobo.batterymeter) โ€” 3,810 users - [Battery Charge - Power Meter](https://chrome-stats.com/d/ovh.oft.chargemeter) โ€” 43,278 users, 4.00 / 5 - [Ampere Battery Pro Charger](https://chrome-stats.com/d/com.nane.amperepro) โ€” 61,050 users, 3.17 / 5 --- Source: [Chrome-Stats](https://chrome-stats.com/d/com.nagy.wattmate)