# ETC Library vs EPA VSAT

The clearest difference is rating: EPA VSAT at 5.0 against ETC Library's 3.8. EPA VSAT also leads on update cadence (fortnightly vs every 3 months). ETC Library's advantage is ratings volume (4 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

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

EPA VSAT holds the better App Store score, 5.0 against 3.8. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

ETC Library ships an update every 3 months, EPA VSAT fortnightly. The most recent releases landed on October 15, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | ETC Library | EPA VSAT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (4 ratings)](https://appshunter.io/ios/app/etc-library/id733300518/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/epa-vsat/id1191936044/reviews)** |
| Number of ratings | **4** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Free | Free |
| Size | 68 MB | 1 MB |
| Requires iOS | 17 | **16.6** |
| Devices | **iPhone, iPad** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Electronic Theatre Controls, Inc.](https://appshunter.io/developer/318210459) | [United States Environmental Protection Agency (USEPA)](https://appshunter.io/developer/466052690) |

## What reviewers say

### ETC Library

[App page](https://appshunter.io/ios/app/etc-library/id733300518)

Access technical documentation for a wide range of products. Browse and share datasheets, application sheets, and brochures organized by product family. This virtual binder provides quick access to essential product information.

**Highlights:** Access to hundreds of technical documents, Organized by product family and category, View datasheets, application sheets, and brochures, Easy document sharing, Offline access to downloaded documents

**Features:** Vision Pro support

**In-app purchases:** none


### EPA VSAT

[App page](https://appshunter.io/ios/app/epa-vsat/id1191936044)

This tool helps drinking water and wastewater systems assess risks from malevolent acts and natural hazards. It assists in evaluating improvements for enhanced security and resilience, aiding compliance with regulatory requirements.

**Highlights:** Risk assessment for water systems, Resilience evaluation, Security improvement assessment, Compliance with Safe Drinking Water Act, Assesses malevolent acts and natural hazards

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ETC Library free?

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

### Is EPA VSAT free?

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

### Which has better reviews, ETC Library or EPA VSAT?

EPA VSAT is rated higher. ETC Library averages 3.8 out of 5 from 4 ratings, while EPA VSAT averages 5.0 from 1 ratings.

### Do ETC Library or EPA VSAT have ads?

Neither ETC Library nor EPA VSAT shows ads.

### Which is updated more often, ETC Library or EPA VSAT?

ETC Library ships an update every 3 months, and EPA VSAT fortnightly. Most recently, ETC Library was updated on October 15, 2026 and EPA VSAT on October 10, 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.*