# Watt Cost — kWh, cost and CO2 calculations

> kWh, cost and CO2 calculations (iPhone/iPad app by Rick Jansen.)

- Source: https://appshunter.io/ios/app/watt-cost/id969996080 (this page in markdown: same URL + `.md`)
- Developer: [Rick Jansen](https://appshunter.io/developer/288704033)
- Category: Lifestyle, Utilities
- Price: $1.99
- Age rating: 4+
- Requires: iOS 9.0 · 2 MB
- Languages: American English, Dutch
- Released: 2015-03-23
- Data updated: 2026-05-19
- User reviews in markdown: https://appshunter.io/ios/app/watt-cost/id969996080/reviews.md

## What is Watt Cost?

Energy, carbon emissions and cost calculator: enter power rating in Watt, enter hours use per day/week/month, standby power, and see what you pay, and how much CO2 you generate. Or, choose from the built-in list of more than 100 appliances, and see what they cost you per day, month and year.

You can easily make an inventory of all appliances in your house, per room, and see where you can save. What are the unexpected power consumers?

Sort the listings by name, room, power rating and power consumption. 
Extended and simple views of the data are available.

No in-app purchases
No advertisements.
No data is transmitted (total privacy).
No internet connection needed.
No data is shared with other people or parties.


## Version history (last 5 releases)

### 1.1.2 — 2022-10-16

Updated for newer iOS

### 1.1.1 — 2020-03-29

- update for iOS 13: crash on change of Settings

### 1.1.0 — 2019-02-21

- Added CO2 carbon emission calculations
- Fixed vertical alignment of the numbers

### 1.0.1 — 2016-01-16

- Fixed the absence of navigation buttons on iOS9
- Appliances with a set power usage per day are now displayed properly in the library.
- Settings fixed: if bill amount is changed the other amounts are now properly adjusted

### 1.0.0 — 2015-03-23

No release notes.

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## More apps by Rick Jansen

- [NL Woordvinder Nederlands PRO](https://appshunter.io/ios/app/nl-woordvinder-nederlands-pro/id301053619)
- [English Words Finder PRO](https://appshunter.io/ios/app/english-words-finder-pro/id306191124)
- [NL Woordvinder Wordfeud](https://appshunter.io/ios/app/nl-woordvinder-wordfeud/id471778257)
- [Words Finder Wordfeud/TWL](https://appshunter.io/ios/app/words-finder-wordfeudtwl/id475202151)
- [Words Finder Wordfeud/SOWPODS](https://appshunter.io/ios/app/words-finder-wordfeudsowpods/id475202295)
- [Svenska Words Finder Wordfeud](https://appshunter.io/ios/app/svenska-words-finder-wordfeud/id476530905)

All apps by Rick Jansen: https://appshunter.io/developer/288704033

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-19.*