Wattwise or spreadsheets?
Spreadsheets work until a second person needs to edit at the same time or a driver needs it on a phone. That is the point where our products start.
Per month
Rs14,400
Rs480 a day
Rs175,200 a year
12.00 kWh a day at Rs40 a unit
1500W
8h
1
Side by side
The case for spreadsheets
The case for Wattwise
Free and familiar
Roles: a driver or staff member sees only their part
Infinitely flexible
Works on a phone with one thumb
Fine for one person and one location
No formula to break and no file to overwrite
History of who changed what, and when
What Wattwise includes
- 98 appliance presets across 12 categories
- Single-rate or slab tariffs, with taxes and fees
- Tariff, voltage and sun-hour presets for your country
- Slab Guard, Meter check and Bill X-ray
- Solar payback against your own region's sun hours
- A PDF energy report, saved wherever you choose
- No account; calculations work offline
- Free with ads; one payment removes them for life
Price
Free, with ads, or one payment to remove them.
DevMarDe product, built and run by our team
Designed, built and supported by DevMarDe. Not resold, not white-labelled, and not handed to anyone else after launch. The people who wrote it take the support calls.
100
Lighthouse performance on this site. Same for SEO, accessibility and best practices
5
products of our own in production
3
practices, each with a named lead
1 day
reply time on every enquiry
4.9
from 9 reviews
Questions people ask
- Is Wattwise free?
- Yes. It is free with ads, the same way most apps are, and one small payment removes the ads for life. Nothing else sits behind that payment: every preset, every tool, the solar payback and the PDF report are all in the free app.
- What does the ad-free purchase cost?
- It is priced by region through Google Play, in 173 countries: around $4.99 in higher-income markets, $1.99 in the middle tier and about $1 everywhere else, charged in your local currency. For example $4.99 in the US, £4.49 in the UK, R$9.99 in Brazil, ₹110 in India and Rs 270 in Pakistan. One payment, not a subscription.
- When can I download it?
- Now. Wattwise is on Google Play for Android, published as dev.wattwise.app, and the button on this page opens the listing.
- Can it tell me before my bill jumps a slab?
- Yes, that is what Slab Guard is for. Enter your tariff's slabs once and it projects this month's units from your appliances, shows how close you are to the next slab and what crossing it would cost.
- Does Wattwise read my meter?
- No, you do. Type in one meter reading and Meter check shows the range the meter should be in on any later day. If the real meter is well outside it, something is missing from your list, left on, leaking or the meter is fast.
- Do I need an account?
- No. There is no sign-up and no login. Your appliance list, tariff and every calculation stay on your phone, and the calculations work without an internet connection. The only thing that uses the internet is the ads.
- How accurate is the estimate?
- It is arithmetic on the numbers you give it: wattage, hours, duty cycle, standby draw, your tariff and its taxes and fees. The solar figures are annual averages for your country rather than a forecast for your roof.
- Which currencies does it support?
- Forty, shown with their ISO codes (USD, PKR, INR, EUR and so on). Switch currency and your rates convert with it.
- Is there an iPhone version?
- Not yet. Wattwise is on Android, published as dev.wattwise.app.