# ISO Today — California ISO

> Monitor California ISO power grid, prices, and renewable energy production. (iPhone/iPad app by California Independent System Operator Corporation.)

- Source: https://appshunter.io/ios/app/iso-today/id596881268 (this page in markdown: same URL + `.md`)
- Developer: [California Independent System Operator Corporation](https://appshunter.io/developer/596881471)
- Category: Business, Productivity
- Price: Free
- Rating: 4.22/5 from 102 App Store ratings · 58 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 11 MB
- Languages: English
- Released: 2013-02-07
- Data updated: 2026-06-09
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/iso-today/id596881268/reviews.md

## What is ISO Today?

Monitor California ISO power grid conditions, prices and renewable production, receive notifications and track calendar events with this free mobile application.
 
Features:
· Monitor available resource adequacy capacity to identify when energy supply might be tight, up to 7 days in advance.
· View grid status and available capacity measured against the current demand and the forecasted peak.
· View renewables and supply graphs as stacked charts.
· View peak and daily production data for past dates on the renewables trend graph.
· View breakdown of supply and renewables serving the ISO.
· Monitor emissions.
· View wholesale energy prices on the price map. Use the slider to easily filter out nodes based on Location Marginal Prices (LMP).
· Compare demand and net demand plus historic data.
· Users can receive Flex Alerts to notify them when conservation is needed, get energy system notifications, along with ability to add ISO meetings and events to their calendar.
 
About the California ISO:
As the nonprofit public-benefit corporation ensuring reliability for most of California's and a portion of Nevada's high-voltage power grid, the California Independent System Operator (ISO) is helping advance a smarter, cleaner, and more reliable energy future. The ISO operates a competitive energy market that balances supply with demand and has a key role in achieving clean energy goals in the West. For more information about California ISO, visit www.caiso.com.

## Key features

- Monitor resource adequacy capacity
- View grid status and demand
- Renewables and supply graphs
- Wholesale energy price map
- Receive Flex Alerts
- Track calendar events

## Recent user reviews (10 of 58)

All indexed reviews: https://appshunter.io/ios/app/iso-today/id596881268/reviews.md

### 3/5 — New text size

*2024-11-06*

On my iPhone 12 with current is the text size for things like alerts is way too small.   Changing the IOS text size for this app doesn't change the size.   Bummer, I really like the app but this makes it hard to use.

### 1/5 — App does not work

*2024-05-17, version 4.8*

The app on my iPhone 11 Pro gives an Error message, and no information.

### 4/5 — Very nice app

*2022-12-10*

The app has a lot of great informative information. The ability to get power network alerts is helpful for personal conservation to lower demand. The ability to get localized alerts would be helpful. Power problems in areas that do not have an effect locally is extraneous. Would be nice to be able to turn on/off alerts for specific locales.

### 4/5 — Very good app

*2022-09-08*

This app has all the necessary information for the grid. Good job. There are a couple of problems one is that the alerts cannot be cleared. The other is that the page that displays the current state of the grid does not scroll properly when there are alerts on the grid status. I tried to refresh page or pull it but it is hard to use.

### 3/5 — Correctable errors, otherwise great

*2022-09-07*

Basically the general functions of the app seem excellent, with the alerts directly useful to consumers, the other data interesting and educational. 

Bugs: 
* On a smaller-screen iPhone (e.g., 6s) the items below Calendar on the Home Screen are difficult-to-impossible to reach. “Daily Briefing” is only half-visible, and can be tapped with care, but “Twitter” and “About Flex Alert” can only be seen while holding a swipe-up but cannot be tapped. * “Calendar” crashes instantly and reproducibly. 

Fix these bugs and my rating would be 4+. Otherwise it seems like a great app. I like the plotting options and all the informative “(i)”-button help screens. 

Feature request: 
* Add an ability to see multi-day and seasonal trends.

Support previous commenter’s request for a home-screen widget! Show the current alert status, maybe with time remaining before the alert ends, and perhaps the current demand.

### 5/5 — I’m surprised this app is this good

*2022-09-06, version 4.6*

Whoever wrote this app should take on the rest of California’s apps. They did a really good job with it, and I’m pretty hard to please.

### 5/5 — Wow

*2022-05-02*

This app is unreasonably cool. Very easy to use, aesthetically pleasing, and full of interesting information. My only suggestion so far would be to include widgets so I can see some info at a glance on my Home Screen

### 5/5 — The future of consumers understanding their electricity use

*2021-10-07*

I’ve been consuming CAISO’s online reports for sometime now and I’m quite pleased the app has my most often consumer reports easily displayed in the alongside a few new ones. I encourage them to continue their great work. This is the future of consumers understanding how their time of use can have a large impact on emissions, prices and stability of the grid. Keep it up!

### 1/5 — Crashes every time I try to launch it

*2021-06-18, version 4.3*

This app is useless. I just installed it and it crashes every single time I launch it :(

### 4/5 — Calendar Crash

*2021-06-16, version 4.3*

1) Launch app version 4.3
2) Tap calendar

CRASH!

## Frequently asked questions about ISO Today

### What does the ISO Today app do?

The ISO Today app allows users to monitor the California ISO power grid's conditions, energy prices, and renewable energy production. It provides insights into resource adequacy, demand forecasts, and supply breakdowns, helping users understand the state's energy landscape.

### What are the key features of ISO Today?

Key features include monitoring resource adequacy capacity up to seven days in advance, viewing grid status against current demand, and analyzing renewables and supply graphs. Users can also view wholesale energy prices, compare demand data, and receive important notifications like Flex Alerts.

### Is ISO Today free to use?

Yes, ISO Today is a free mobile application. There are no costs associated with downloading or using its features, and it does not offer in-app purchases or display advertisements.

### Who is the target audience for ISO Today?

This app is designed for anyone interested in the California and Nevada power grid, including consumers who want to stay informed about energy conservation needs, individuals tracking renewable energy trends, and those interested in wholesale energy market prices.

### How does the app help with energy conservation?

The app provides Flex Alerts to notify users when energy conservation is needed. By monitoring grid status and supply adequacy, users can better understand when demand is high and conservation efforts are most impactful.

## Version history (last 5 releases)

### 5.5 — 2026-04-30

• New social media screen 
• Prices: added GHG for nodes. DA will now only show ISO and EDAM regions

### 4.8.1 — 2026-01-20

• Fixed an issue where some Daily Briefing group labels appeared as black text on a black background.
• Updated the Twitter link to point to the correct account feed on X.

### 4.8 — 2023-11-10

· On the home page the Grid status section shows "in effect" and upcoming notifications, previously only "in effect" were visible.
· Receive cancelled or ended push notifications for new and current versions of ISO Today.
· Notifications page now shows ended and cancelled notifications, in addition to issued and updated notifications.
· Notification icon on home page shows the number of notifications received rather than number of "in effect" events.
· The counter badge on the Notification icon will now clear after viewing the Notification page.
·         App icon badge no longer shows number of "in effect" events.
·         Minor bug fixes and language changes.

### 4.7 — 2023-02-07

• Added new Hybrids page accessible from the Supply page. Includes new Hybrids pie and trend charts.
• Hybrids trend chart provides line and stacked-graph options.
• Hybrids trend chart provides peak and production data for past days using the date picker, then the Options drop down.
• Removed most Hybrids from Batteries trend chart.
• Batteries trend chart display can be broken down to show all batteries, stand-alone batteries and hybrid batteries using the Options drop down.
• Batteries trend chart provides peaks and daily production data for past days using the date picker, then the Options drop down.
• Updated content in information pages.

### 4.6 — 2022-06-07

What's New and Updated!
• Available capacity is relabeled to Current capacity and represents all capacity on the system, loaded and unloaded.
• Updated capacity status to include 1 hour available capacity and 4 hour available capacity. 
• Updated capacity status to include reserves. Reserves is included in 1 hour available capacity.
• Added Current reserves to Demand screen overview.
• Added forecasted peak time to Demand screen overview.
• Added Demand response events to demand line. This will turn the Demand line red when Demand response significantly affects demand during emergencies.
• Removed Today’s peak from demand screen overview for clarity.
• Removed Historical peak from demand screen overview. It is still available in the information screen.

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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 2026-06-09.*