# Chemical Engineering+ vs Mento

The clearest difference is update cadence: Mento at every 3 days against Chemical Engineering+'s every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Chemical Engineering+ sells 6 in-app purchases, starting at $9.99 per month and Mento sells 4 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Chemical Engineering+ ships an update every 2 months, Mento every 3 days. The most recent releases landed on June 3, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | Chemical Engineering+ | Mento |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/chemical-engineering-plus/id6740001145/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 18 MB | 82 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Forwa Elade Wunde](https://appshunter.io/developer/1685241344) | [Blalingo](https://appshunter.io/developer/1877495864) |

## What reviewers say

### Chemical Engineering+

[App page](https://appshunter.io/ios/app/chemical-engineering-plus/id6740001145)

Test your knowledge of chemical engineering with a comprehensive quiz app. It offers thousands of questions across various topics, adaptive difficulty, and detailed explanations to enhance learning. Prepare for exams and boost your industry skills with this interactive tool.

**Highlights:** Extensive question bank, Topic-specific quizzes, Calculations & problem solving, Adaptive difficulty, Interactive learning with explanations, Offline play, Leaderboard competition

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month | $9.99 | per month |
| 6 Months | $19.99 | per 6 months |
| 1 Year | $29.99 | per year |
| 1500 | $0.99 | one-time |
| 3500 | $1.99 | one-time |
| 9000 | $3.99 | one-time |


### Mento

[App page](https://appshunter.io/ios/app/mento-notes-you-remember/id6765486277)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Student Monthly | $9.99 | per month |
| Pro Monthly | $16.99 | per month |
| Student Yearly | $64.99 | per year |
| Pro Yearly | $109.99 | per year |


## Frequently asked questions

### Is Chemical Engineering+ free?

Chemical Engineering+ is free to download, with in-app purchases available.

### Is Mento free?

Mento is free to download, with in-app purchases available.

### Do Chemical Engineering+ or Mento have ads?

Neither Chemical Engineering+ nor Mento shows ads.

### Which is updated more often, Chemical Engineering+ or Mento?

Chemical Engineering+ ships an update every 2 months, and Mento every 3 days. Most recently, Chemical Engineering+ was updated on June 3, 2026 and Mento on September 12, 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.*