Slopes vs Notable Stories
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Slopes
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.
- Interactive ODE exploration
- Vector field plotting
- Systems of equations solver
- Numerical approximation methods
- Bifurcation diagram creation
- Preloaded and custom examples
Read full descriptionHide full description
Slopes is an interactive environment for exploring graphical solutions to ordinary differential equations. Slopes consists of six activities with preloaded examples to get you started and the ability to input your own content. "Slopefields" and “Phase Planes” both plot vector fields and solutions corresponding to multiple initial conditions. “Systems” dynamically solves systems of up to six equations. “Oscillations” solves second-order constant coefficient equations and animates the corresponding spring-mass system or RLC circuit. “Methods” constructs numerical approximations of a single ordinary differential equation using Euler’s method as well as Second and Fourth Order Runge-Kutta methods. "Bifurcations" creates a bifurcation diagram and shows the stability of equilibrium points. Slopes is a playground for ODEs. You can use it for homework, in-class activities or a new research project.
Notable Stories
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.
- 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
Read full descriptionHide full description
Notable Stories creates AI-illustrated, AI-narrated storybooks personalised for your children. Simply describe the story you want — a brave little dragon, a lost puppy, a trip to the moon — and Notable Stories generates a unique illustrated storybook with professional voice narration in seconds. FEATURES - AI Story Generation — unique stories every time - Beautiful AI Illustrations — watercolor, cartoon, and more - Professional Voice Narration — AI voices - Clone Your Voice — narrate stories in your own voice - Age-Appropriate Content — tailored for 0-8 years - Reading Lock — child-safe mode for independent reading - Share Stories — send stories to family and friends Perfect for bedtime, road trips, and sparking a love of reading. Terms of Use: https://app.notablestories.com/terms Privacy Policy: https://app.notablestories.com/privacy
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Slopes | Notable Stories |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (41 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 41 — better | 1 |
| Update frequency | Every 2 months | Every 4 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.4 |
| Further details — not scored | ||
| Size | 21 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Tim Lucas | Leon Lipp |
In-app purchases
Slopes
No in-app purchases
Notable Stories
- Monthly Subscription$4.991 Month
- Story Pack$4.99
Questions
Is Slopes free?
Is Notable Stories free?
Which has better reviews, Slopes or Notable Stories?
Do Slopes or Notable Stories have ads?
Which is updated more often, Slopes or Notable Stories?
Other comparisons















