# WolframAlpha vs SISO Calculator

The clearest difference is review sentiment: SISO Calculator at 100% against WolframAlpha's 35%. SISO Calculator also leads on rating (5.0 vs 2.8) and in-app purchases (none vs 6). WolframAlpha's advantage is ratings volume (129 vs 3). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. WolframAlpha sells 6 in-app purchases, starting at $9.99 per month. SISO Calculator asks for nothing beyond the download.

SISO Calculator holds the better App Store score, 5.0 against 2.8. That said, the two scores are not equally well evidenced: WolframAlpha has 129 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 35% of WolframAlpha's written reviews are positive against 100% of SISO Calculator's.

WolframAlpha ships an update every 2 months, SISO Calculator every 5 weeks. The most recent releases landed on September 21, 2026 and June 3, 2026 respectively.

## The numbers

| Metric | WolframAlpha | SISO Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.8 (129 ratings)](https://appshunter.io/ios/app/wolframalpha/id548861535/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/siso-calculator/id1548141101/reviews)** |
| Number of ratings | **129** | 3 |
| Positive reviews | 35.2% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 366 MB | 4 MB |
| Requires iOS | 17.6 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 9+ | 4+ |
| Developer | [Wolfram Group LLC](https://appshunter.io/developer/715130979) | [Deft Dynamics LLC](https://appshunter.io/developer/1288783778) |

## What reviewers say

### WolframAlpha

[App page](https://appshunter.io/ios/app/wolframalpha/id548861535)

This app serves as a powerful computational knowledge engine for homework and research. It offers comprehensive support across numerous academic subjects, from math and physics to biology and economics. Unlock advanced features like step-by-step solutions and photo input for a more in-depth learning experience.

**Highlights:** Step-by-step solutions with hints, Photo input for math problems, Input Assistants for various subjects, Thousands of covered domains, Homework and exam preparation

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $9.99 | per month |
| Pro for Students Monthly | $9.99 | per month |
| Pro for Educators Monthly | $9.99 | per month |
| Pro Yearly | $59.99 | per year |
| Pro for Students Yearly | $59.99 | per year |
| Pro for Educators Yearly | $59.99 | per year |

**What reviewers like**

- 🚀 Powerful search engine
- 📚 Comprehensive information
- 🔍 Helpful for math and other subjects
- ⭐ Essential app for students and professionals

**What reviewers complain about**

- 🐛 Buggy and crashes frequently
- 💰 Expensive subscription model
- 📵 Limited functionality in free version
- 🤔 Confusing and unintuitive to use

**Reported bugs**

- Login screen freezes
- Incompatible with older devices
- Search bar issues and crashes
- Incorrect or incomplete results

**Requested features**

- Dark mode option
- Improved handwritten math recognition
- Better integration with Siri
- More customization options


### SISO Calculator

[App page](https://appshunter.io/ios/app/siso-calculator/id1548141101)

This app helps engineers and students understand System Dynamics and Controls. It offers an intuitive interface to quickly analyze controller and plant interactions in both time and frequency domains.

**Highlights:** System Dynamics analysis, Controls engineering, Intuitive interface, Time domain analysis, Frequency domain analysis, Controller interaction visualization

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is WolframAlpha free?

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

### Is SISO Calculator free?

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

### Which has better reviews, WolframAlpha or SISO Calculator?

SISO Calculator is rated higher. WolframAlpha averages 2.8 out of 5 from 129 ratings, while SISO Calculator averages 5.0 from 3 ratings.

### Do WolframAlpha or SISO Calculator have ads?

Neither WolframAlpha nor SISO Calculator shows ads.

### Which is updated more often, WolframAlpha or SISO Calculator?

WolframAlpha ships an update every 2 months, and SISO Calculator every 5 weeks. Most recently, WolframAlpha was updated on September 21, 2026 and SISO Calculator on June 3, 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.*