# TVA Energy Data vs Mercuria MAP

The clearest difference is update cadence: Mercuria MAP at fortnightly against TVA Energy Data's every 6 months. TVA Energy Data's advantage is ratings volume (3 vs 1) and iOS requirement (13.0 vs 17.0). On price, rating, 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.

On the App Store both sit at effectively the same score — 5.0 for TVA Energy Data against 5.0 for Mercuria MAP. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

TVA Energy Data ships an update every 6 months, Mercuria MAP fortnightly. The most recent releases landed on October 18, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | TVA Energy Data | Mercuria MAP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/tva-energy-data/id1024744472/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/mercuria-map-c/id6448470874/reviews) |
| Number of ratings | **3** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Fortnightly** |
| Monetization | Free | Free |
| Size | 26 MB | 231 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Tennessee Valley Authority](https://appshunter.io/developer/440331546) | [Mercuria Energy America LLC](https://appshunter.io/developer/1683213408) |

## What reviewers say

### TVA Energy Data

[App page](https://appshunter.io/ios/app/tva-energy-data/id1024744472)

Access near real-time and historical energy usage data, demand information, and power system alerts. This app requires authorized access and is designed for TVA's directly served customers needing on-the-go information.

**Highlights:** Near real-time energy data, Current day interval data, Month-to-date usage and demand, Historical energy and demand, Power system alerts, TVA key contacts

**Features:** macOS Compatibility

**In-app purchases:** none


### Mercuria MAP

[App page](https://appshunter.io/ios/app/mercuria-map-c/id6448470874)

Access real-time and day-ahead electricity prices for major North American power market hubs. View data in tables, charts, and maps, customize your view, and receive notifications for price changes. This app helps users make informed trading decisions and monitor market trends.

**Highlights:** Real-time and day-ahead power prices, Data visualization (tables, charts, map), Price comparison across regions, Customizable preferences and filters, Favorite hub saving, Price change notifications, Data export and sharing

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TVA Energy Data free?

TVA Energy Data is free to download, with no in-app purchases.

### Is Mercuria MAP free?

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

### Which has better reviews, TVA Energy Data or Mercuria MAP?

TVA Energy Data and Mercuria MAP are both rated 5.0 out of 5 on the App Store, from 3 and 1 ratings respectively.

### Do TVA Energy Data or Mercuria MAP have ads?

Neither TVA Energy Data nor Mercuria MAP shows ads.

### Which is updated more often, TVA Energy Data or Mercuria MAP?

TVA Energy Data ships an update every 6 months, and Mercuria MAP fortnightly. Most recently, TVA Energy Data was updated on October 18, 2026 and Mercuria MAP on October 15, 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.*