Windows Desktop App

Know what your PC costs to run

Real-time power monitoring with live £/hr display. Reads your hardware sensors directly — no smart plug required. Free forever.

Download Free Windows 10+ See pricing

7-day free Pro trial included

Everything you need

Free features that actually work. Pro when you want more.

Live Power Gauge

Real-time arc gauge showing your total system draw. Colour gradient from green to red.

Free

Cost Per Hour

Custom electricity rate, standing charge, and currency — see exactly what you're paying right now.

Free

Power Breakdown

Stacked bar showing CPU, GPU, and system draw. Know which component is draining your wallet.

Free

24-Hour History & Export

Sparkline trend, CSV export, hourly/daily stats. Your data, always accessible.

Free

Optimization Engine

Detects idle waste, flags background power drains, suggests undervolt savings — in plain English.

Pro

Extended Analytics

7-day and 30-day history, week/month/year cost projections, one-click powercfg fixes.

Pro

How it works

01

Download & Install

MSI, portable EXE, or setup.
Runs on Windows 10 and 11.

02

Run as Administrator

One UAC prompt to read
your hardware sensors.

03

See Your £/hr

Live gauge, cost breakdown,
and history appear instantly.

One price. Forever.

No subscriptions. No ads. No data collection.

WattWise Pro

One-time

Everything in Free, plus optimization engine, extended history, idle waste detection, and one-click fixes.

£4.99

one-time

Buy Pro £4.99 7-day free trial included

Prefer to start free? Download WattWise Free — live monitoring, cost/hr, 24h history, CSV export. No trial. No expiry.

Ready to see what your PC costs?

Windows 10+ · .NET 8 runtime · Administrator rights required

Download WattWise