# Graphing Calculator X84 vs Implicit Differentiation Cal

The clearest difference is in-app purchases: Implicit Differentiation Cal at none against Graphing Calculator X84's 1. Implicit Differentiation Cal also leads on ads (none vs shown). Graphing Calculator X84's advantage is update cadence (every 3 months vs every 9 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Graphing Calculator X84 sells 1 one-off in-app purchase. Implicit Differentiation Cal asks for nothing beyond the download.

Graphing Calculator X84 ships an update every 3 months, Implicit Differentiation Cal every 9 months. The most recent releases landed on September 24, 2026 and December 5, 2025 respectively.

## The numbers

| Metric | Graphing Calculator X84 | Implicit Differentiation Cal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (50K ratings)](https://appshunter.io/ios/app/graphing-calculator-x84/id1247828717/reviews)** | — |
| Number of ratings | **50K** | — |
| Positive reviews | 38.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 months** | Every 9 months |
| Monetization | Free with in-app purchases | — |
| Size | 23 MB | 24 MB |
| Requires iOS | **12.1** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Incpt.Mobis](https://appshunter.io/developer/445261166) | [Ahmad Sattar](https://appshunter.io/developer/1458483953) |

## What reviewers say

### Graphing Calculator X84

[App page](https://appshunter.io/ios/app/graphing-calculator-x84/id1247828717)

This app offers a free, powerful alternative to hardware graphing calculators. It supports basic to complex math, including graphing, statistics, and matrix operations, with a built-in user manual for assistance.

**Highlights:** Graphing of functions, Statistics and regression analysis, Matrix operations, Equation and polynomial solver, Integral and derivative calculation, Mathematical display

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO Upgrade | $5.99 | one-time |

**What reviewers like**

- 🚀 Exact replica of TI-84 calculator
- 🤩 Great for school/college math
- 👍 Convenient to have on phone
- 💰 Cheaper than physical calculator

**What reviewers complain about**

- 📺 Intrusive and frequent ads
- 🔓 Key features locked behind paywall
- 🛑 Restricted functionality compared to physical TI-84
- 🤯 Ads disrupt focus during timed tests

**Reported bugs**

- Calculation errors on basic functions
- Graphing and programming features not working as expected
- Frequent crashes and freezes

**Requested features**

- Option to pay and remove ads
- More customization options
- Haptic feedback when pressing buttons
- Better integration with physical TI-84 calculators


### 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 Graphing Calculator X84 free?

Graphing Calculator X84 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 Graphing Calculator X84 or Implicit Differentiation Cal have ads?

Graphing Calculator X84 shows ads; Implicit Differentiation Cal does not.

### Which is updated more often, Graphing Calculator X84 or Implicit Differentiation Cal?

Graphing Calculator X84 ships an update every 3 months, and Implicit Differentiation Cal every 9 months. Most recently, Graphing Calculator X84 was updated on September 24, 2026 and Implicit Differentiation Cal on December 5, 2025.

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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.*