# ISO Today vs Alerts by SDGE

The clearest difference is update cadence: Alerts by SDGE at monthly against ISO Today's every 3 months. On price, rating, review sentiment and ratings volume there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.2 for ISO Today against 4.2 for Alerts by SDGE. Both are backed by a comparable volume of ratings — 103 and 47 respectively. Written reviews are what separate them: 74% of ISO Today's written reviews are positive against 73% of Alerts by SDGE's.

ISO Today ships an update every 3 months, Alerts by SDGE monthly. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | ISO Today | Alerts by SDGE |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (103 ratings)](https://appshunter.io/ios/app/iso-today/id596881268/reviews)** | [4.2 (47 ratings)](https://appshunter.io/ios/app/alerts-by-sdge/id1523913310/reviews) |
| Number of ratings | **103** | 47 |
| Positive reviews | **74.1% of reviews** | 72.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Free | Free |
| Size | 11 MB | 17 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [California Independent System Operator Corporation](https://appshunter.io/developer/596881471) | [San Diego Gas & Electric](https://appshunter.io/developer/489246333) |

## What reviewers say

### ISO Today

[App page](https://appshunter.io/ios/app/iso-today/id596881268)

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:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 💡 Informative data about grid
- 👍 Easy to use interface
- 📊 Nice graphs and visuals
- 🚀 Fast loading (in some reviews)
- ✅ Good for energy consumers

**What reviewers complain about**

- 🐛 Crashes frequently
- ⚠️ Alerts not clearing
- 📩 Too many duplicate alerts
- 🐌 Slow loading times
- 📱 Text size too small

**Reported bugs**

- 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

**Requested features**

- 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


### Alerts by SDGE

[App page](https://appshunter.io/ios/app/alerts-by-sdge/id1523913310)

Receive timely updates and information about potential and active Public Safety Power Shutoffs (PSPS) in your area. Track outages affecting saved locations, find nearby resource centers, and get estimated restoration times.

**Highlights:** PSPS notifications, Outage tracking, Saved location alerts, Resource center locator, Estimated restoration times

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ISO Today free?

ISO Today is free to download, with no in-app purchases.

### Is Alerts by SDGE free?

Alerts by SDGE is free to download, with no in-app purchases.

### Which has better reviews, ISO Today or Alerts by SDGE?

ISO Today is rated higher. ISO Today averages 4.2 out of 5 from 103 ratings, while Alerts by SDGE averages 4.2 from 47 ratings.

### Do ISO Today or Alerts by SDGE have ads?

Neither ISO Today nor Alerts by SDGE shows ads.

### Which is updated more often, ISO Today or Alerts by SDGE?

ISO Today ships an update every 3 months, and Alerts by SDGE monthly. Most recently, ISO Today was updated on November 1, 2026 and Alerts by SDGE on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*