# Slopes vs Notable Stories

The clearest difference is in-app purchases: Slopes at none against Notable Stories's 2. Slopes also leads on ratings volume (41 vs 1) and iOS requirement (15.0 vs 17.4). Notable Stories's advantage is update cadence (every 4 weeks vs every 2 months). On price, rating, ads and device support there is nothing between them.

Both are free to download. Notable Stories sells 2 in-app purchases, starting at $4.99 per month. Slopes asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.9 for Slopes against 5.0 for Notable Stories. That said, the two scores are not equally well evidenced: Slopes has 41 ratings behind it against 1, so its average is the more settled of the two.

Slopes ships an update every 2 months, Notable Stories every 4 weeks. The most recent releases landed on October 6, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Slopes | Notable Stories |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (41 ratings)](https://appshunter.io/ios/app/slopes-differential-equations/id1136920301/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/notable-stories/id6768683549/reviews)** |
| Number of ratings | **41** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 21 MB | 3 MB |
| Requires iOS | **15.0** | 17.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Tim Lucas](https://appshunter.io/developer/1136916670) | [Leon Lipp](https://appshunter.io/developer/1896581674) |

## 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


### Notable Stories

[App page](https://appshunter.io/ios/app/notable-stories/id6768683549)

Create personalized, AI-illustrated storybooks with professional narration for children. Describe any story idea, and the app generates a unique book with custom illustrations and voiceovers. Features include voice cloning and age-appropriate content for ages 0-8.

**Highlights:** AI story generation, AI-illustrated storybooks, Professional AI voice narration, Clone your voice for narration, Age-appropriate content (0-8 years), Child-safe reading mode, Share stories with family and friends

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $4.99 | per month |
| Story Pack | $4.99 | one-time |


## Frequently asked questions

### Is Slopes free?

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

### Is Notable Stories free?

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

### Which has better reviews, Slopes or Notable Stories?

Notable Stories is rated higher. Slopes averages 4.9 out of 5 from 41 ratings, while Notable Stories averages 5.0 from 1 ratings.

### Do Slopes or Notable Stories have ads?

Neither Slopes nor Notable Stories shows ads.

### Which is updated more often, Slopes or Notable Stories?

Slopes ships an update every 2 months, and Notable Stories every 4 weeks. Most recently, Slopes was updated on October 6, 2026 and Notable Stories on October 8, 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.*