# Quadratic Master vs Implicit Differentiation Cal

The clearest difference is in-app purchases: Implicit Differentiation Cal at none against Quadratic Master's 1. Implicit Differentiation Cal also leads on iOS requirement (13.0 vs 16.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Quadratic Master sells 1 one-off in-app purchase. Implicit Differentiation Cal asks for nothing beyond the download.

Quadratic Master ships an update every 5 months, Implicit Differentiation Cal every 9 months. The most recent releases landed on September 20, 2026 and December 5, 2025 respectively.

## The numbers

| Metric | Quadratic Master | Implicit Differentiation Cal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (333 ratings)](https://appshunter.io/ios/app/quadratic-master/id351899924/reviews)** | — |
| Number of ratings | **333** | — |
| Positive reviews | 73.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 9 months |
| Monetization | Free with in-app purchases | — |
| Size | 4 MB | 24 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Lukas Petr](https://appshunter.io/developer/820384324) | [Ahmad Sattar](https://appshunter.io/developer/1458483953) |

## What reviewers say

### Quadratic Master

[App page](https://appshunter.io/ios/app/quadratic-master/id351899924)

This app helps users solve and learn about quadratic equations, inequations, and functions. It offers tools for students and professionals, including solvers, formulas, and visual aids like 3D parabola models. Share solutions and explore function graphs with this educational math tool.

**Highlights:** Quadratic equation solver, Quadratic inequation solver, Quadratic function solver, 3D rotating parabola model, Graph mixer, Detailed solution explanations

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full version | $3.99 | one-time |

**What reviewers like**

- 👍 Simple and easy to use
- 💡 Solves quadratic equations
- 🚫 No ads
- 📚 Helpful for homework
- 🚀 Handy for complicated equations

**What reviewers complain about**

- 🐛 Input keypad incomplete
- 🐛 App not working
- 🐛 Cannot enter problems
- 🐛 Not showing in app library
- 🐛 Cannot change addition to subtraction

**Reported bugs**

- Input keypad incomplete after iOS update
- App not working/unusable
- Cannot enter problems
- Not showing in app library
- Cannot change addition to subtraction

**Requested features**

- Ability to use large decimals/scientific notation
- Cooler icon
- Change standard formula to vertex form


### Implicit Differentiation Cal

[App page](https://appshunter.io/ios/app/implicit-differentiation-cal/id1607963477)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Quadratic Master free?

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

### Is Implicit Differentiation Cal free?

Implicit Differentiation Cal is free to download, with no in-app purchases.

### Do Quadratic Master or Implicit Differentiation Cal have ads?

Neither Quadratic Master nor Implicit Differentiation Cal shows ads.

### Which is updated more often, Quadratic Master or Implicit Differentiation Cal?

Quadratic Master ships an update every 5 months, and Implicit Differentiation Cal every 9 months. Most recently, Quadratic Master was updated on September 20, 2026 and Implicit Differentiation Cal on December 5, 2025.

---

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