# SISO Calculator vs Mathletic

The clearest difference is in-app purchases: SISO Calculator at none against Mathletic's 3. SISO Calculator also leads on rating (5.0 vs 4.8) and device support (3 vs 1). On price, review sentiment, ratings volume and ads there is nothing between them.

Both are free to download. Mathletic sells 3 in-app purchases, starting at $1.99 per month. SISO Calculator asks for nothing beyond the download.

SISO Calculator holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 3 and 4 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

## The numbers

| Metric | SISO Calculator | Mathletic |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/siso-calculator/id1548141101/reviews)** | [4.8 (4 ratings)](https://appshunter.io/ios/app/mathletic/id6504717536/reviews) |
| Number of ratings | 3 | **4** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | — |
| Monetization | **Free** | Free with in-app purchases |
| Size | 4 MB | 6 MB |
| Requires iOS | **14.0** | 17.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Deft Dynamics](https://appshunter.io/developer/1288783778) | [Nicholas Crino](https://appshunter.io/developer/1753502045) |

## What reviewers say

### 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


### Mathletic

[App page](https://appshunter.io/ios/app/mathletic/id6504717536)

Master mental math with this app's free curriculum and customizable trainer. Learn techniques for complex calculations, track your progress with analytics, and sharpen your mind for school or personal challenges.

**Highlights:** Mental math techniques, Complex calculation training, Customizable interface, Progress tracking analytics, Free curriculum

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Access | $1.99 | per month |
| All Access | $9.99 | per year |
| Tea-sized Tip | $3.99 | one-time |


## Frequently asked questions

### Is SISO Calculator free?

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

### Is Mathletic free?

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

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

SISO Calculator is rated higher. SISO Calculator averages 5.0 out of 5 from 3 ratings, while Mathletic averages 4.8 from 4 ratings.

### Do SISO Calculator or Mathletic have ads?

Neither SISO Calculator nor Mathletic shows ads.

---

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