Watt CS: Charging Speed Meter

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.