# Quick Graph vs CALC Prime

The clearest difference is price: Quick Graph at Free against CALC Prime's $8.99. Quick Graph also leads on ratings volume (405 vs 4) and rating (4.6 vs 4.3). CALC Prime's advantage is in-app purchases (none vs 1). On update cadence, ads and device support there is nothing between them.

Quick Graph is free to download; CALC Prime costs $8.99 up front. Quick Graph sells 1 one-off in-app purchase. CALC Prime asks for nothing beyond the download.

Quick Graph holds the better App Store score, 4.6 against 4.3. That said, the two scores are not equally well evidenced: Quick Graph has 405 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 94% of Quick Graph's written reviews are positive against 74% of CALC Prime's.

Quick Graph ships an update every 3 months, CALC Prime every 2 months. The most recent releases landed on October 1, 2026 and August 28, 2026 respectively.

## The numbers

| Metric | Quick Graph | CALC Prime |
| --- | --- | --- |
| Price | **Free** | $8.99 |
| Rating | **[4.6 (405 ratings)](https://appshunter.io/ios/app/quick-graph/id292412367/reviews)** | [4.3 (4 ratings)](https://appshunter.io/ios/app/calc-prime/id842563364/reviews) |
| Number of ratings | **405** | 4 |
| Positive reviews | **93.6% of reviews** | 73.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 3 MB | 9 MB |
| Requires iOS | **9.0** | 15.5 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [KZ Labs](https://appshunter.io/developer/1091008972) | [QApps LLC](https://appshunter.io/developer/395652397) |

## What reviewers say

### Quick Graph

[App page](https://appshunter.io/ios/app/quick-graph/id292412367)

This powerful graphing calculator leverages multitouch displays for 2D and 3D equation visualization. It supports various coordinate systems and offers features like equation editing, evaluation, and a library for storing common formulas. Advanced features are available through an in-app purchase.

**Highlights:** 2D and 3D graphing, Multiple coordinate systems, Equation evaluation, Equation library, Copy/email/save graphs, Implicit and inequality graphing (advanced)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Advanced Features | $1.99 | one-time |

**What reviewers like**

- 🚀 Beautiful display
- 🚀 Quick and straightforward equations entry
- 🚀 Configurable axes and easy translation
- 👍 Wonderful and beautiful app
- 👍 Long tradition of working well

**What reviewers complain about**

- 🐛 Can't really graph polar
- 🐛 Redesign stinks
- 🐛 Few options for tablet version
- 🐛 Confusing design
- 🐛 Horrible manual

**Reported bugs**

- Crashes when trying to save to photos
- Equations not visible when projecting to external display
- Incorrect rendering of some functions like y=tan(x)*x
- Degradation in 3D plot quality when zooming out
- Equations not working as expected for simple cases like x+y=0

**Requested features**

- Display 3D surface with variable opacity or as wireframe
- Ability to define and display functions over a certain interval
- Ability to define and display parametric equations
- Ability to move cursor around within a function while typing
- Ability to animate equations with a parameter


### CALC Prime

[App page](https://appshunter.io/ios/app/calc-prime/id842563364)

This advanced scientific calculator is designed for professionals and students, offering a wide range of functions, live conversions, and graphing capabilities. It features a history log, customizable themes, and easy expression editing, making complex calculations intuitive and visually appealing.

**Highlights:** Advanced scientific calculation, Smart Basic Graphing, Live currency and custom conversions, History log with aggregate functions, Customizable themes and layout, Native watchOS app and custom keyboard

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is Quick Graph free?

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

### Is CALC Prime free?

CALC Prime costs $8.99, with no in-app purchases.

### Which has better reviews, Quick Graph or CALC Prime?

Quick Graph is rated higher. Quick Graph averages 4.6 out of 5 from 405 ratings, while CALC Prime averages 4.3 from 4 ratings.

### Do Quick Graph or CALC Prime have ads?

Neither Quick Graph nor CALC Prime shows ads.

### Which is updated more often, Quick Graph or CALC Prime?

Quick Graph ships an update every 3 months, and CALC Prime every 2 months. Most recently, Quick Graph was updated on October 1, 2026 and CALC Prime on August 28, 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.*