# ISO Today vs UAMPS

The clearest difference is update cadence: ISO Today at every 3 months against UAMPS's every 10 months. ISO Today also leads on iOS requirement (13.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

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

ISO Today ships an update every 3 months, UAMPS every 10 months. The most recent releases landed on October 17, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | ISO Today | UAMPS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (102 ratings)](https://appshunter.io/ios/app/iso-today/id596881268/reviews)** | — |
| Number of ratings | **102** | — |
| Positive reviews | 74.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 10 months |
| Monetization | Free | — |
| Size | 11 MB | 64 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [California Independent System Operator Corporation](https://appshunter.io/developer/596881471) | [Utah Associated Municipal Power Sytems](https://appshunter.io/developer/1420501838) |

## 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


### UAMPS

[App page](https://appshunter.io/ios/app/uamps/id1633656980)

**Features:** macOS Compatibility, 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 UAMPS free?

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

### Do ISO Today or UAMPS have ads?

Neither ISO Today nor UAMPS shows ads.

### Which is updated more often, ISO Today or UAMPS?

ISO Today ships an update every 3 months, and UAMPS every 10 months. Most recently, ISO Today was updated on October 17, 2026 and UAMPS on September 11, 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.*