# ELC TR U vs Teach on Mars

The clearest difference is ratings volume: ELC TR U at 7 against Teach on Mars's 1. On price, rating, update cadence and ads 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 ELC TR U against 5.0 for Teach on Mars. That said, the two scores are not equally well evidenced: ELC TR U has 7 ratings behind it against 1, so its average is the more settled of the two.

ELC TR U ships an update every 2 months, Teach on Mars every 6 weeks. The most recent releases landed on October 21, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | ELC TR U | Teach on Mars |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (7 ratings)](https://appshunter.io/ios/app/elc-tr-u/id1498891255/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/teach-on-mars/id1580854583/reviews) |
| Number of ratings | **7** | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 58 MB | 120 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [The Estee Lauder Companies Inc.](https://appshunter.io/developer/1343238385) | [Teach on Mars](https://appshunter.io/developer/674099907) |

## What reviewers say

### ELC TR U

[App page](https://appshunter.io/ios/app/elc-tr-u/id1498891255)

Explore the world of Duty Free shopping with this educational app. Learn about products and retail strategies in a fun and engaging way. Perfect for those interested in the travel retail industry.

**Highlights:** Duty Free shopping exploration, Travel retail industry insights, Product knowledge, Retail strategy learning, Engaging educational content

**Features:** macOS Compatibility

**In-app purchases:** none


### Teach on Mars

[App page](https://appshunter.io/ios/app/teach-on-mars/id1580854583)

Expand your daily knowledge with diverse content and personalized learning. Compete with friends, earn badges, and achieve expert status through certifications. Stay updated on digital learning trends via the news feed.

**Highlights:** Hundreds of content on various themes, Personalized profile and preferences, Challenge friends and colleagues, Collect badges and accumulate points, Reach top of leaderboards, Obtain certifications, Digital learning trends news feed

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ELC TR U free?

ELC TR U is free to download, with no in-app purchases.

### Is Teach on Mars free?

Teach on Mars is free to download, with no in-app purchases.

### Which has better reviews, ELC TR U or Teach on Mars?

ELC TR U and Teach on Mars are both rated 5.0 out of 5 on the App Store, from 7 and 1 ratings respectively.

### Do ELC TR U or Teach on Mars have ads?

Neither ELC TR U nor Teach on Mars shows ads.

### Which is updated more often, ELC TR U or Teach on Mars?

ELC TR U ships an update every 2 months, and Teach on Mars every 6 weeks. Most recently, ELC TR U was updated on October 21, 2026 and Teach on Mars 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.*