Comparison

ISO Today vs SPP Go

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

SPP Go

Stay informed about regional electricity grid conditions. Receive instant alerts for advisories and alerts impacting your service territory. Access additional grid condition information online.

Highlights
  • Real-time push notifications
  • Advisories and alerts
  • Service territory specific information
  • Grid condition updates
  • Access to additional online resources
Features
Read full description

Southwest Power Pool is a regional transmission organization responsible for ensuring the reliable and affordable delivery of wholesale electricity to utilities across a 17-state region in the central United States. With the SPP Go app, mobile users can receive push notifications any time SPP declares an advisory or alert signaling changing conditions on the power grid in their service territory. Additional information is available at www.SPP.org/grid-conditions.

Screenshots

ISO Today4 screens
SPP Go4 screens

Verdict

The call

The clearest difference is rating: SPP Go at 4.8 against ISO Today's 4.2. SPP Go also leads on review sentiment (100% vs 74%). ISO Today's advantage is ratings volume (102 vs 4) and iOS requirement (13.0 vs 16.4). 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

SPP Go holds the better App Store score, 4.8 against 4.2. That said, the two scores are not equally well evidenced: ISO Today has 102 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 74% of ISO Today's written reviews are positive against 100% of SPP Go's.

UpkeepUpdate frequency

ISO Today ships an update every 3 months, SPP Go every 5 months. The most recent releases landed on June 9, 2026 and September 8, 2026 respectively.

Scorecard4 real differences · 6 level
ISO Today versus SPP Go: the parameters behind the verdict, then further details
ParameterISO TodaySPP Go
PriceFreeFree
Rating4.2 (102 ratings)4.8 (4 ratings) — better
Positive reviews74.1% of reviews100.0% of reviews — better
Number of ratings102 — better4
Update frequencyEvery 3 months — betterEvery 5 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better16.4
Further details — not scored
Size11 MB47 MB
Age rating4+4+
DeveloperCalifornia Independent System Operator CorporationSouthwest Power Pool

Customer experience

ISO Today

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

SPP Go

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

ISO Today

No in-app purchases

None

SPP Go

No in-app purchases

Questions

Is ISO Today free?
ISO Today is free to download, with no in-app purchases.
Is SPP Go free?
SPP Go is free to download, with no in-app purchases.
Which has better reviews, ISO Today or SPP Go?
SPP Go is rated higher. ISO Today averages 4.2 out of 5 from 102 ratings, while SPP Go averages 4.8 from 4 ratings.
Do ISO Today or SPP Go have ads?
Neither ISO Today nor SPP Go shows ads.
Which is updated more often, ISO Today or SPP Go?
ISO Today ships an update every 3 months, and SPP Go every 5 months. Most recently, ISO Today was updated on June 9, 2026 and SPP Go on September 8, 2026.

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