Watt CS: Charging Speed Meter
No in-app products collected for this app.
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Description
Stop guessing. Start measuring.
Watt CS shows your charger's true output in real time — down to 0.1W — using direct hardware sensor data via the Nitro Library. Plug in and instantly know if you're getting fast charging, or being shortchanged by a cheap cable.
REAL-TIME WATTAGE MONITOR —
Live watts updated continuously with 0.1W precision
Direct hardware sensor access via Nitro Library — not estimated
Dynamic charging ring changes color and icon for Fast or Full states
Professional hardware calibration ensures every reading is accurate
BENCHMARK YOUR CHARGERS —
Run scientific speed tests with custom start and end percentages
Test Apple 20W, Anker, MacBook charger, or any cable side by side
Charger Leaderboard automatically ranks every charger by real efficiency
Know exactly which charger is worth keeping and which to replace
SMART CHARGING HISTORY —
Every session logged automatically: Max Watts, Avg Speed, Total Time
One-tap filters: Fast, Normal, or Slow sessions in one tap
Spot patterns — does your charger slow down at night? History reveals it
UNDERSTAND YOUR BATTERY —
80% Trickle Detection with visual warning and science-backed explanation
Know why charging intentionally slows after 80% to protect battery health
No more wondering if something is wrong — the app explains it clearly
PREMIUM & PRIVATE —
No ads. No accounts. No internet connection required.
All data stays entirely on your device
Glassmorphism UI, full Dark Mode, animated splash screen
Designed for iPhone and iPad
PERFECT FOR:
→ Testing a new charger before trusting it overnight
→ Diagnosing why your iPhone charges slowly
→ Verifying your cable actually supports fast charging
→ Deciding which charger to pack for a trip
Watt CS gives you the data. You make the decision.