WattFlow: Real Battery Power

⚡ Your 100W charger might be charging at 8W — and you'd never know.

A worn cable, a dusty port, a misaligned wireless pad or a hot battery can silently cut your charging speed by 90%. Your phone still says "super fast charging". WattFlow shows you what's actually happening.

WattFlow is an honest, real-time meter for every watt that flows in or out of your battery — plus real tools to understand what's going on with your charging and your battery's health.

LIVE, TRACKED
• Live watts refreshed every second — charging in, draining out
• Wired (AC / USB / dock) and wireless, detected automatically
• Voltage, current, temperature and battery level at a glance
• Peak In / Peak Out tracking and a live 60-second power graph
• Animated charge flow — watch the current move
• Home screen widgets (Small/Medium/Large) with a 7-day charging chart

FIND THE PROBLEMS
• Charging Benchmark — grade your charger and cable in 60 seconds
• Charging Q&A — 14 common questions answered with real measured data, wired and wireless, across multiple devices
• Report an inaccurate reading — compare against your own USB power meter

THE HONEST NUMBER
WattFlow shows battery-side power — what actually reaches (or leaves) your battery, not the marketing number on the charger brick. That's why it can read lower than the charger's own display: conversion losses and system drain are real, and knowing the difference is the whole point.

BUILT FOR EVERY SCREEN
Adapts to phones, tablets, foldables and Chromebooks — the same real data, laid out for the screen you're on.

WATTFLOW PRO — one-time purchase, yours forever
• 24/7 background history — every charge and discharge session logged automatically, even with the app closed
• Energy Ledger — daily energy in vs. out, at a glance
• Sleep Drain — how much battery you lose overnight, and why
• Battery Health Trend — is your battery actually degrading, or is that reading just noise?
• Floating watts overlay — a draggable live-watts pill over any app
• Adjustable charge and low-battery alert thresholds
• CSV export

Zero permissions by default. No ads. Your data stays on your device.