# Calculator ∞ vs Quick Conversion Units

The clearest difference is in-app purchases: Quick Conversion Units at none against Calculator ∞'s 4. Quick Conversion Units also leads on review sentiment (100% vs 75%) and rating (5.0 vs 4.7). Calculator ∞'s advantage is update cadence (every 2 months vs every 44 months) and ratings volume (6.3K vs 1). On ads, device support and iOS requirement there is nothing between them.

Calculator ∞ costs $5.99 and Quick Conversion Units $4.99 up front. Calculator ∞ sells 4 in-app purchases, starting at $3.49 per month. Quick Conversion Units asks for nothing beyond the download.

Quick Conversion Units holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Calculator ∞ has 6.3K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 75% of Calculator ∞'s written reviews are positive against 100% of Quick Conversion Units's.

Calculator ∞ ships an update every 2 months, Quick Conversion Units every 44 months. The most recent releases landed on September 30, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Calculator ∞ | Quick Conversion Units |
| --- | --- | --- |
| Price | $5.99 | **$4.99** |
| Rating | [4.7 (6.3K ratings)](https://appshunter.io/ios/app/calculator/id458535809/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/quick-conversion-units/id1159050734/reviews)** |
| Number of ratings | **6.3K** | 1 |
| Positive reviews | 74.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 44 months |
| Monetization | **Free with in-app purchases** | Paid |
| Best chart rank | **#130** | — |
| Size | 46 MB | 32 MB |
| Requires iOS | 12.1 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Incpt.Mobis](https://appshunter.io/developer/445261166) | [bader alshammari](https://appshunter.io/developer/858126240) |

## What reviewers say

### Calculator ∞

[App page](https://appshunter.io/ios/app/calculator/id458535809)

**Currently charting:** #130 Top Paid · Education (US App Store)

This advanced calculator app offers a powerful math core and algebra engine for basic to complex calculations. It includes features like step-by-step solutions, handwriting recognition, and 2D graphing, making it suitable for students, engineers, and programmers.

**Highlights:** Step-by-step solution hints, Math Photos Solver, Handwriting Recognition, AI Math Problem Solver, 2D Graphing, Unit Converter, Matrix/Vector Mode

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited OCR/Writing 1 Month | $3.49 | per month |
| Unlimited OCR/Writing 3 Months | $8.99 | per 3 months |
| 400 AI Recognition & Queries | $0.99 | one-time |
| 900 AI Recognition & Queries | $1.99 | one-time |


### Quick Conversion Units

[App page](https://appshunter.io/ios/app/quick-conversion-units/id1159050734)

This app offers a streamlined conversion experience for oilfield professionals. It provides over 1000 conversion types across 19 categories, all accessible on a single screen for maximum efficiency and accuracy.

**Highlights:** Single-screen conversions, 19 conversion categories, 1000+ conversion types, Oilfield specific units, Increases productivity, Enhances accuracy

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Calculator ∞ free?

Calculator ∞ costs $5.99, and also offers in-app purchases.

### Is Quick Conversion Units free?

Quick Conversion Units costs $4.99, with no in-app purchases.

### Which has better reviews, Calculator ∞ or Quick Conversion Units?

Quick Conversion Units is rated higher. Calculator ∞ averages 4.7 out of 5 from 6.3K ratings, while Quick Conversion Units averages 5.0 from 1 ratings.

### Do Calculator ∞ or Quick Conversion Units have ads?

Neither Calculator ∞ nor Quick Conversion Units shows ads.

### Which is updated more often, Calculator ∞ or Quick Conversion Units?

Calculator ∞ ships an update every 2 months, and Quick Conversion Units every 44 months. Most recently, Calculator ∞ was updated on September 30, 2026 and Quick Conversion Units on September 29, 2026.

---

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