# Chemical Engineering+ vs Olingua

The clearest difference is in-app purchases: Olingua at none against Chemical Engineering+'s 6. Olingua also leads on update cadence (every 2 weeks vs every 2 months) and iOS requirement (15.6 vs 17.0). On price, ads 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. Olingua asks for nothing beyond the download.

Chemical Engineering+ ships an update every 2 months, Olingua every 2 weeks. The most recent releases landed on June 3, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Chemical Engineering+ | Olingua |
| --- | --- | --- |
| 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 | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 18 MB | 112 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Forwa Elade Wunde](https://appshunter.io/developer/1685241344) | [Vladimir Nosikov](https://appshunter.io/developer/1813440971) |

## 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 |


### Olingua

[App page](https://appshunter.io/ios/app/olingua/id6745717092)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Chemical Engineering+ free?

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

### Is Olingua free?

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

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

Neither Chemical Engineering+ nor Olingua shows ads.

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

Chemical Engineering+ ships an update every 2 months, and Olingua every 2 weeks. Most recently, Chemical Engineering+ was updated on June 3, 2026 and Olingua on September 16, 2026.

---

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