Comparison

ISO Today vs PJM Now

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ISO Today

Track California's power grid status, energy prices, and renewable production. Receive alerts for conservation needs and monitor supply adequacy up to seven days ahead. View detailed supply breakdowns and historical data.

Highlights
  • Monitor resource adequacy capacity
  • View grid status and demand
  • Renewables and supply graphs
  • Wholesale energy price map
  • Receive Flex Alerts
  • Track calendar events
Features
Read full description

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.

About

PJM Now

Monitor electricity usage, grid status, and wholesale power prices in real-time for the PJM Interconnection region. Get alerts for price changes and grid conditions, and view power flow and fuel mix.

Highlights
  • Real-time electricity use tracking
  • Wholesale power price monitoring
  • Interactive map of prices by location
  • PJM grid condition alerts
  • Power flow visualization
  • Current fuel mix display
Features
Read full description

Track electricity use, power grid conditions and wholesale power prices in real time throughout the region PJM Interconnection serves with the simple and easy-to-use PJM Now app. • See wholesale power prices and trends broken down by location on an interactive map • Receive alerts when wholesale power prices in your area reach the level of your choosing • Receive alerts about PJM grid conditions for your chosen area • Track real-time electricity use and compare it to the day’s forecasted use • See how power flows in and out of the region PJM serves • See the current fuel mix PJM Interconnection, founded in 1927, ensures the reliability of the high-voltage electric power system serving 65 million people in all or parts of Delaware, Illinois, Indiana, Kentucky, Maryland, Michigan, New Jersey, North Carolina, Ohio, Pennsylvania, Tennessee, Virginia, West Virginia and the District of Columbia. PJM coordinates and directs the operation of the region’s transmission grid, which includes over 84,042 miles of transmission lines; administers a competitive wholesale electricity market; and plans regional transmission expansion improvements to maintain grid reliability and relieve congestion. Visit PJM at www.pjm.com.

Screenshots

ISO Today4 screens
PJM Now4 screens

Verdict

The call

The clearest difference is review sentiment: ISO Today at 74% against PJM Now's 22%. ISO Today also leads on rating (4.2 vs 3.6) and ratings volume (103 vs 26). On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

ISO Today holds the better App Store score, 4.2 against 3.6. Both are backed by a comparable volume of ratings — 103 and 26 respectively. Written reviews point the same way: 74% of ISO Today's written reviews are positive against 22% of PJM Now's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.

Scorecard4 real differences · 6 level
ISO Today versus PJM Now: the parameters behind the verdict, then further details
ParameterISO TodayPJM Now
PriceFreeFree
Rating4.2 (103 ratings) — better3.6 (26 ratings)
Positive reviews74.1% of reviews — better22.2% of reviews
Number of ratings103 — better26
Update frequencyEvery 3 monthsEvery 3 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.1
Further details — not scored
Size11 MB38 MB
Age rating4+4+
DeveloperCalifornia Independent System Operator CorporationPJM Interconnection

Customer experience

ISO Today

All ratings101 ratings
Positive80.2%
Neutral4.0%
Negative15.8%
Written reviews58 reviews
Positive74.1%
Neutral6.9%
Negative19.0%

PJM Now

All ratings26 ratings
Positive65.4%
Neutral0.0%
Negative34.6%
Written reviews9 reviews
Positive22.2%
Neutral0.0%
Negative77.8%

Bugs and requests

ISO Today

Reported bugs

10 issues
  • App crashes on launch
  • Calendar crashes instantly
  • Alerts cannot be cleared
  • Page does not scroll properly with alerts
  • Items below Calendar unreachable on smaller screens
Show 5 more
  • Text size for alerts too small and not adjustable
  • App crashes when trying to view alert
  • Alerts persist after reading
  • Notifications are persistent even after refreshing
  • App exits multiple times in a minute

Requested features

7 requests
  • Localized alerts
  • Ability to turn on/off alerts for specific locales
  • Multi-day and seasonal trends
  • Home-screen widget
  • See today's demand vs. last year/week
Show 2 more
  • More differentiation on negative pricing levels
  • 7-day history for a node

PJM Now

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

ISO Today

No in-app purchases

None

PJM Now

No in-app purchases

Questions

Is ISO Today free?
ISO Today is free to download, with no in-app purchases.
Is PJM Now free?
PJM Now is free to download, with no in-app purchases.
Which has better reviews, ISO Today or PJM Now?
ISO Today is rated higher. ISO Today averages 4.2 out of 5 from 103 ratings, while PJM Now averages 3.6 from 26 ratings.
Do ISO Today or PJM Now have ads?
Neither ISO Today nor PJM Now shows ads.
Which is updated more often, ISO Today or PJM Now?
ISO Today ships an update every 3 months, and PJM Now every 3 months. Most recently, ISO Today was updated on November 1, 2026 and PJM Now on November 6, 2026.

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