# Unit Converter Expert vs Curiosity

The clearest difference is rating: Curiosity at 4.8 against Unit Converter Expert's 4.3. Curiosity also leads on review sentiment (80% vs 50%) and ratings volume (172 vs 3). Unit Converter Expert's advantage is monetization model (free vs free with in-app purchases) and iOS requirement (9.0 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Unit Converter Expert sells 1 one-off in-app purchase and Curiosity sells 9 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

Curiosity holds the better App Store score, 4.8 against 4.3. That said, the two scores are not equally well evidenced: Curiosity has 172 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 50% of Unit Converter Expert's written reviews are positive against 80% of Curiosity's.

Unit Converter Expert ships an update every 3 weeks, Curiosity every 2 weeks. The most recent releases landed on October 24, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Unit Converter Expert | Curiosity |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (3 ratings)](https://appshunter.io/ios/app/unit-converter-expert/id1491878360/reviews) | **[4.8 (172 ratings)](https://appshunter.io/ios/app/curiosity-knowledge-is-power/id6462845357/reviews)** |
| Number of ratings | 3 | **172** |
| Positive reviews | 50.0% of reviews | **80.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 21 MB | 63 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Mehta Group Ltd](https://appshunter.io/developer/368949469) | [Rishabh Maini](https://appshunter.io/developer/1585715820) |

## What reviewers say

### Unit Converter Expert

[App page](https://appshunter.io/ios/app/unit-converter-expert/id1491878360)

This app offers a comprehensive unit conversion tool with five main categories: Basic, Engineering, Computer/IT, Special, and Ancient/Historical. It features an intuitive interface, instant results, and the ability to mark favorite conversions for quick access.

**Highlights:** Wide range of unit conversions, Five main categories, Intuitive user interface, Instant and clear results, Mark favorite conversions, Supports all devices

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unit Converter Pro | $0.99 | one-time |


### Curiosity

[App page](https://appshunter.io/ios/app/curiosity-knowledge-is-power/id6462845357)

Access book-level knowledge in short, engaging multimedia snippets. Learn about diverse topics instantly, anytime, anywhere, with personalized content tailored to your evolving interests. It's a modern approach to expanding your horizons.

**Highlights:** Instant knowledge snippets, Multimedia learning experience, Personalized learning journeys, Snackable content format, Diverse range of topics, Seamless user experience

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Curiosity Monthly | $7.99 | per month |
| Curiosity Premium | $7.99 | per month |
| Curiosity Weekly Premium | $7.99 | per 7 days |
| Curiosity Monthly | $8.99 | per month |
| Curiosity Weekly | $9.99 | per 7 days |
| Curiosity Yearly Exit Offer 1 | $34.99 | per year |
| Curiosity Yearly | $49.99 | per year |
| Curiosity Yearly Sub (7 Day Free) | $69.99 | per year |
| Curiosity Yearly Premium | $69.99 | per year |


## Frequently asked questions

### Is Unit Converter Expert free?

Unit Converter Expert is free to download, with in-app purchases available.

### Is Curiosity free?

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

### Which has better reviews, Unit Converter Expert or Curiosity?

Curiosity is rated higher. Unit Converter Expert averages 4.3 out of 5 from 3 ratings, while Curiosity averages 4.8 from 172 ratings.

### Do Unit Converter Expert or Curiosity have ads?

Neither Unit Converter Expert nor Curiosity shows ads.

### Which is updated more often, Unit Converter Expert or Curiosity?

Unit Converter Expert ships an update every 3 weeks, and Curiosity every 2 weeks. Most recently, Unit Converter Expert was updated on October 24, 2026 and Curiosity on October 20, 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.*