ISO Today vs SPP Go
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Monitor resource adequacy capacity
- View grid status and demand
- Renewables and supply graphs
- Wholesale energy price map
- Receive Flex Alerts
- Track calendar events
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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.
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.
- Real-time push notifications
- Advisories and alerts
- Service territory specific information
- Grid condition updates
- Access to additional online resources
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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
Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
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.
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.
| Parameter | ISO Today | SPP Go |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (102 ratings) | 4.8 (4 ratings) — better |
| Positive reviews | 74.1% of reviews | 100.0% of reviews — better |
| Number of ratings | 102 — better | 4 |
| Update frequency | Every 3 months — better | Every 5 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 11 MB | 47 MB |
| Age rating | 4+ | 4+ |
| Developer | California Independent System Operator Corporation | Southwest Power Pool |
Customer experience
ISO Today
SPP Go
In-app purchases
ISO Today
No in-app purchases
SPP Go
No in-app purchases









