# Slopes vs Calculus

The clearest difference is review sentiment: Slopes at 100% against Calculus's 33%. Slopes also leads on rating (4.9 vs 3.5) and in-app purchases (none vs 13). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Calculus sells 13 one-off in-app purchases. Slopes asks for nothing beyond the download.

Slopes holds the better App Store score, 4.9 against 3.5. That said, the two scores are not equally well evidenced: Slopes has 41 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 100% of Slopes's written reviews are positive against 33% of Calculus's.

Slopes ships an update every 2 months, Calculus every 16 months. The most recent releases landed on October 6, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Slopes | Calculus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (41 ratings)](https://appshunter.io/ios/app/slopes-differential-equations/id1136920301/reviews)** | [3.5 (4 ratings)](https://appshunter.io/ios/app/calculus-pro/id1638196645/reviews) |
| Number of ratings | **41** | 4 |
| Positive reviews | **100.0% of reviews** | 33.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 16 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 21 MB | 40 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tim Lucas](https://appshunter.io/developer/1136916670) | [Richard Ssenyonjo](https://appshunter.io/developer/1528776742) |

## What reviewers say

### Slopes

[App page](https://appshunter.io/ios/app/slopes-differential-equations/id1136920301)

Explore graphical solutions to ordinary differential equations with this interactive educational tool. It offers six distinct activities, including plotting vector fields, solving systems of equations, and visualizing oscillations. Ideal for homework, classroom use, or research projects.

**Highlights:** Interactive ODE exploration, Vector field plotting, Systems of equations solver, Numerical approximation methods, Bifurcation diagram creation, Preloaded and custom examples

**Features:** macOS Compatibility

**In-app purchases:** none


### Calculus

[App page](https://appshunter.io/ios/app/calculus-pro/id1638196645)

Learn calculus comprehensively through 10 chapters and reinforce your understanding with an interactive quiz game. This app caters to both beginners and advanced learners, offering hints and challenging problems. Enjoy a clear, adaptable interface with font size adjustments and light/dark mode support.

**Highlights:** 10-chapter calculus curriculum, Interactive calculus quiz game, Beginner to advanced learning paths, Adjustable font size, Light and dark mode support, Covers differentiation, integration, and differential equations

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Get 1,000 Coins | $0.99 | one-time |
| Get 5,000 Coins | $1.99 | one-time |
| Get 10,000 Coins | $2.99 | one-time |
| Unlock Calculus 1 | $2.99 | one-time |
| Unlock Calculus 2 | $2.99 | one-time |
| Unlock Calculus 3 | $2.99 | one-time |
| Unlock Chapter 5 | $2.99 | one-time |
| Unlock Calculus 8 | $2.99 | one-time |
| Unlock Calculus 9 | $2.99 | one-time |
| Unlock Calculus 4 | $2.99 | one-time |
| Unlock Calculus 6 | $2.99 | one-time |
| Unlock Calculus 7 | $2.99 | one-time |
| Unlock Calculus 10 | $2.99 | one-time |


## Frequently asked questions

### Is Slopes free?

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

### Is Calculus free?

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

### Which has better reviews, Slopes or Calculus?

Slopes is rated higher. Slopes averages 4.9 out of 5 from 41 ratings, while Calculus averages 3.5 from 4 ratings.

### Do Slopes or Calculus have ads?

Neither Slopes nor Calculus shows ads.

### Which is updated more often, Slopes or Calculus?

Slopes ships an update every 2 months, and Calculus every 16 months. Most recently, Slopes was updated on October 6, 2026 and Calculus on September 27, 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.*