# ISO Today vs PJM Now

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.

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

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.

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

## The numbers

| Metric | ISO Today | PJM Now |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (103 ratings)](https://appshunter.io/ios/app/iso-today/id596881268/reviews)** | [3.6 (26 ratings)](https://appshunter.io/ios/app/pjm-now/id1180491584/reviews) |
| Number of ratings | **103** | 26 |
| Positive reviews | **74.1% of reviews** | 22.2% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Free | Free |
| Size | 11 MB | 38 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [California Independent System Operator Corporation](https://appshunter.io/developer/596881471) | [PJM Interconnection](https://appshunter.io/developer/1180491583) |

## 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


### PJM Now

[App page](https://appshunter.io/ios/app/pjm-now/id1180491584)

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