# eSOMS Logbook vs TVA Operating Experience

The clearest difference is update cadence: TVA Operating Experience at every 7 months against eSOMS Logbook's every 45 months. TVA Operating Experience also leads on iOS requirement (8.0 vs 15.0). 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.

eSOMS Logbook ships an update every 45 months, TVA Operating Experience every 7 months. The most recent releases landed on October 24, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | eSOMS Logbook | TVA Operating Experience |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/tva-operating-experience/id1370958722/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 45 months | **Every 7 months** |
| Monetization | — | Free |
| Size | 11 MB | 15 MB |
| Requires iOS | 15.0 | **8.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hitachi Energy USA Inc.](https://appshunter.io/developer/513449048) | [Tennessee Valley Authority](https://appshunter.io/developer/440331546) |

## What reviewers say

### eSOMS Logbook

[App page](https://appshunter.io/ios/app/esoms-logbook/id1310420808)

**Features:** macOS Compatibility

**In-app purchases:** none


### TVA Operating Experience

[App page](https://appshunter.io/ios/app/tva-operating-experience/id1370958722)

Record and review operational experiences, safety incidents, and environmental events. This tool helps document important occurrences for review and analysis.

**Highlights:** Review operational experiences, Record safety incidents, Log environmental events, Document events for analysis

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is eSOMS Logbook free?

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

### Is TVA Operating Experience free?

TVA Operating Experience is free to download, with no in-app purchases.

### Do eSOMS Logbook or TVA Operating Experience have ads?

Neither eSOMS Logbook nor TVA Operating Experience shows ads.

### Which is updated more often, eSOMS Logbook or TVA Operating Experience?

eSOMS Logbook ships an update every 45 months, and TVA Operating Experience every 7 months. Most recently, eSOMS Logbook was updated on October 24, 2026 and TVA Operating Experience on October 22, 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.*