See where Ontario's power comes from, when the grid is clean and when it's not.


//Hourly Power & Demand

Track Ontario’s electricity grid hour-by-hour and plant-by-plant using the most current, trustworthy data. Gridwatch breaks out the total generation by fuel type with an option to drill down further for hourly capability and output figures for each power plant. Gridwatch also tracks hourly imports, exports and Ontario's Provincial demand.

//Total Emissions & Intensity

See the total carbon emissions and carbon intensity of Ontario's electricity grid. Drill down into the equivalent emissions in terms of cars and trees to put things in context. Backed by a peer reviewed and published methodology, carbon intensity is a simple indication of how clean (or dirty) the grid is.

//Power Plant Details

Gridwatch not only breaks down total generation by fuel type but also by individual power plant. Each plant's capability and actual contribution a listed for every hour. Want to know more about a specific plant? Location, owner/operator and a specific knowledge nugget is provided for each facility.

//Maps & Trends

View all power plant locations colour coded by fuel type on an interactive map of Ontario. Filter by fuel type, zoom in/out and tap for details about the specific plant. Track both power and emissions trends for the current day along with Ontario's Time-Of-Use schedule. Interact with the trend graphs to see the impact each fuel type has on the grid.

A note to our users outside of Ontario: Gridwatch only tracks the Province of Ontario's electricity grid and does so in Eastern Time.

What’s New

Version 2.3.0

- Updated for newer phones and tablets
- Refreshed icons and colours
- Maintenance and bug fixes

Please email us at with any issues, feedback or suggestions.

Ratings and Reviews

4.8 out of 5
212 Ratings

212 Ratings

bds1953 ,

Good app

There is some missing info on various generating sites. Other generators are simply missing whether due to mothballing or some other unknown reason.

Developer Response ,

Thanks for the feedback bds1953!

We update individual plant details as they become available. If you see missing or incorrect information, please let us know at

Gridwatch uses the publicly available data from the IESO which includes transmission connected generation plants only. If plant generation data is available, it will be included in Gridwatch.

brayden97 ,


Hasn’t been updated in almost a year. No dark mode.

Developer Response ,

Thanks for the feedback brayden97! Gridwatch is a self funded project and as a result, our development cycle is slower than we'd like. That said, dark mode is on our to do list for the next update.

Another retired guy ,

Nice app

Really helps to understand our electricity supply grid.
Shows how little power (relative to the total) is being generated by solar and wind.
I have noticed that many smaller wind and solar farms are not being reported. This distorts the data - which is why I only give it 4 stars.
The app developer says that their information source does not provide data from smaller facilities.

Developer Response ,

Thanks for the feedback Another retired guy. To your point, Gridwatch reports the hourly plant by plant actual generation data from the IESO. Hourly actual data for individual embedded generators (small wind, solar, others) is not currently available.

We are working to include an embedded generator estimate/forecast section in Gridwatch in a future update. From another perspective, embedded generator contributions are reflected in Gridwatch as a reduction in Ontario demand.

For more detail, connect with us by email at


The Energy Insight Group Inc.
5.8 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad and iPod touch.



Age Rating


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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