# Simplex Nodal vs Calculus

The clearest difference is review sentiment: Simplex Nodal at 100% against Calculus's 0%. Simplex Nodal also leads on in-app purchases (none vs 2) and device support (4 vs 2). Calculus's advantage is update cadence (every 2 weeks vs every 4 months). On price and ads there is nothing between them.

Both are free to download. Calculus sells 2 in-app purchases, starting at $4.99 per 7 days. Simplex Nodal asks for nothing beyond the download.

Simplex Nodal ships an update every 4 months, Calculus every 2 weeks. The most recent releases landed on November 1, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Simplex Nodal | Calculus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.0 (4 ratings)](https://appshunter.io/ios/app/calculus-homework-helper/id6754210755/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 14 MB | 36 MB |
| Requires iOS | **9.0** | 15.1 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Simplex Nodal Limited](https://appshunter.io/developer/995736552) | [AlicSystems](https://appshunter.io/developer/1793437899) |

## What reviewers say

### Simplex Nodal

[App page](https://appshunter.io/ios/app/simplex-nodal/id995736553)

Explore electricity markets by building and solving your own models. This app visually demonstrates complex concepts like locational marginal pricing, line losses, and the simplex algorithm. Learn through interactive examples and detailed step-by-step operations.

**Highlights:** Build and solve electricity market models, Visualize simplex algorithm workings, Explore locational marginal pricing, Understand line losses and binding constraints, Step-by-step simplex iteration details, Export simplex tableaux as CSV, Includes sample market models

**In-app purchases:** none


### Calculus

[App page](https://appshunter.io/ios/app/calculus-homework-helper/id6754210755)

This AI-powered math companion provides instant, step-by-step solutions to calculus problems. Easily input questions via photo or typing to understand derivatives, integrals, and limits.

**Highlights:** Photo solver for instant problem capture, Manual input for equation entry, Detailed step-by-step explanations, Instant and accurate solutions, Covers derivatives, integrals, limits, and more

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Weekly | $4.99 | per 7 days |
| Pro Yearly | $19.99 | per year |


## Frequently asked questions

### Is Simplex Nodal free?

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

### Is Calculus free?

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

### Do Simplex Nodal or Calculus have ads?

Neither Simplex Nodal nor Calculus shows ads.

### Which is updated more often, Simplex Nodal or Calculus?

Simplex Nodal ships an update every 4 months, and Calculus every 2 weeks. Most recently, Simplex Nodal was updated on November 1, 2026 and Calculus on October 24, 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.*