Wattwise: Electricity Bill

Which appliance is eating your electricity bill? Wattwise shows you in your own currency, before the bill arrives.

Pick an appliance, set the hours, and the cost per day, month and year moves with the slider. Save what you own in My Home and see which ones take the biggest share of the bill.

WHAT IT DOES
• Electricity bill calculator with 98 appliances: AC, fridge, geyser, water pump, iron, washing machine, TV, EV charger and more, each with a realistic wattage and daily hours.
• Slab tariffs done properly. Enter your slabs once and Slab Guard shows how close you are to the next slab and what crossing it will cost. It handles both ways utilities charge: each block at its own rate, or every unit at the rate of the slab you reach.
• Meter check. Read your meter once and Wattwise shows the range it should be in on any day after. If the real meter is ahead, something is running that you forgot about.
• Bill X-ray. Type in the units from your real bill and see how much of it your appliances explain.
• AC Saver. What a warmer thermostat setting or an inverter AC would save you each month.
• Solar payback. Enter the price you were quoted and see the monthly saving and how many years it takes to pay back, using sun hours for your country.
• UPS backup timer for power cuts: how long your battery keeps the fans, lights and router going.
• PDF report, room by room, to keep or send to an electrician or solar installer.

WORKS WHERE YOU LIVE
• 40 currencies. Change the currency and your rate converts with it.
• Tariff, mains voltage and sun hours preset for your country, and all of them editable.
• 11 languages: English, Urdu, Hindi, Arabic, Spanish (Spain and Latin America), Portuguese, German, French, Indonesian and Japanese. Urdu and Arabic read right to left.

YOUR DATA STAYS ON YOUR PHONE
No account and no sign-in. Your appliances and readings are stored only on your phone, and every calculation works offline. Wattwise is free with ads from Google AdMob, and a one-time purchase removes the ads for good.

THE MATHS, IF YOU WANT IT
Daily energy = watts × hours × duty cycle ÷ 1000, plus standby. A fridge rated 150 W only runs its compressor part of the day, so Wattwise doesn't price it as 150 W for 24 hours.

QUESTIONS PEOPLE ASK
Does it work with slab (tiered) tariffs? Yes. Copy the slab rates from your bill once.
Does it need the internet? No. Everything is calculated on your phone.
Is it free? Yes, with ads. One purchase removes them.
Can it tell me if solar is worth it? It shows the payback for the price you were quoted, using your country's sun hours.