# US Ecotopia vs E

The clearest difference is price: US Ecotopia at Free against E's $14.99. US Ecotopia also leads on iOS requirement (15.0 vs 26.0). E's advantage is update cadence (every 2 days vs every 10 days). On ads, in-app purchases and device support there is nothing between them.

US Ecotopia is free to download; E costs $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

US Ecotopia ships an update every 10 days, E every 2 days. The most recent releases landed on October 25, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | US Ecotopia | E |
| --- | --- | --- |
| Price | **Free** | $14.99 |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/e-calc-usa/id6502258186/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 2 days** |
| Monetization | — | Paid |
| Size | 137 MB | 52 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Druid Tech, LLC](https://appshunter.io/developer/1683282655) | [Snappy Appz Inc.](https://appshunter.io/developer/375591377) |

## What reviewers say

### US Ecotopia

[App page](https://appshunter.io/ios/app/us-ecotopia-animal-tracker/id6448024917)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### E

[App page](https://appshunter.io/ios/app/e-calc-usa/id6502258186)

This app provides electricians and engineers with instant, code-compliant calculations for wire sizing, conduit capacities, fusing, and bonding based on the 2026 National Electrical Code. It offers advanced tools for motors, transformers, voltage drop, and box fill, along with on-site utilities like panel legends and torque settings.

**Highlights:** NEC 2026 compliant calculations, Wire sizing and ampacity, Conduit fill and expansion, Motor and transformer calculations, Voltage drop and box fill, Panel legends and torque settings, Integrated unit converter and Ohm's Law

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is US Ecotopia free?

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

### Is E free?

E costs $14.99, with no in-app purchases.

### Do US Ecotopia or E have ads?

Neither US Ecotopia nor E shows ads.

### Which is updated more often, US Ecotopia or E?

US Ecotopia ships an update every 10 days, and E every 2 days. Most recently, US Ecotopia was updated on October 25, 2026 and E on October 27, 2026.

---

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