# SigiCalc vs GRE Calculator

The clearest difference is rating: SigiCalc at 5.0 against GRE Calculator's 4.5. GRE Calculator's advantage is review sentiment (81% vs 50%) and ratings volume (374 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SigiCalc holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: GRE Calculator has 374 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 50% of SigiCalc's written reviews are positive against 81% of GRE Calculator's, so the app with the better star average is not the one people write more warmly about.

SigiCalc ships an update every 48 months, GRE Calculator every 24 months. The most recent releases landed on September 3, 2026 and July 4, 2026 respectively.

## The numbers

| Metric | SigiCalc | GRE Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sigicalc/id522503444/reviews)** | [4.5 (374 ratings)](https://appshunter.io/ios/app/gre-calculator/id1137504482/reviews) |
| Number of ratings | 1 | **374** |
| Positive reviews | 50.0% of reviews | **80.8% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 48 months | **Every 24 months** |
| Monetization | Free | Free |
| Size | 3 MB | 7 MB |
| Requires iOS | 17.0 | **16.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Siegware](https://appshunter.io/developer/443908611) | [Ahmad Najeeb](https://appshunter.io/developer/1137504481) |

## What reviewers say

### SigiCalc

[App page](https://appshunter.io/ios/app/sigicalc/id522503444)

This app provides a graphical RPN calculator with an undo feature. Users can input mathematical equations and instantly visualize them with a plot. It's designed for simplicity and practicality in mathematical calculations.

**Highlights:** Graphical RPN calculator, Equation plotting, Undo functionality, Simple interface, Practical calculations

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

**In-app purchases:** none


### GRE Calculator

[App page](https://appshunter.io/ios/app/gre-calculator/id1137504482)

Practice for the GRE Quantitative section with a calculator that mimics the restrictions of the official exam. Avoid unrealistic expectations from generic calculators by using a tool designed for accurate GRE preparation.

**Highlights:** Mimics official GRE exam calculator restrictions, Realistic practice experience, Enforces mathematical order of operations, Handles large numbers and undefined computations, Digit display limits and rounding, GRE Exam Style interface

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Helpful for GRE prep
- 👍 Accurate to the real GRE calculator
- 👍 Useful for practicing with limited features
- 👍 Simple and effective
- 👍 Realistic feel of the test day experience

**What reviewers complain about**

- 🐛 Crashes and glitches
- 🤖 Annoying review prompts
- 🤖 Frequent interruptions during practice

**Reported bugs**

- Crashes when using certain functions
- Lag between button press and display
- Incompatibility with newer iOS versions

**Requested features**

- Web/computer version
- Tutorial for advanced functions
- Ability to use on lock screen


## Frequently asked questions

### Is SigiCalc free?

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

### Is GRE Calculator free?

GRE Calculator is free to download, with no in-app purchases.

### Which has better reviews, SigiCalc or GRE Calculator?

SigiCalc is rated higher. SigiCalc averages 5.0 out of 5 from 1 ratings, while GRE Calculator averages 4.5 from 374 ratings.

### Do SigiCalc or GRE Calculator have ads?

Neither SigiCalc nor GRE Calculator shows ads.

### Which is updated more often, SigiCalc or GRE Calculator?

SigiCalc ships an update every 48 months, and GRE Calculator every 24 months. Most recently, SigiCalc was updated on September 3, 2026 and GRE Calculator on July 4, 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.*