# DecisionMentor vs Math Beast

The clearest difference is rating: Math Beast at 5.0 against DecisionMentor's 4.0. Math Beast also leads on ads (none vs shown) and monetization model (free vs free with in-app purchases). DecisionMentor's advantage is ratings volume (4 vs 1). On price, update cadence and in-app purchases there is nothing between them.

Both are free to download. DecisionMentor sells 1 in-app purchase, starting at $3.99 per month and Math Beast sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Math Beast holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

DecisionMentor ships an update every 5 weeks, Math Beast monthly. Both last shipped on September 24, 2026.

## The numbers

| Metric | DecisionMentor | Math Beast |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (4 ratings)](https://appshunter.io/ios/app/decisionmentor/id1531462898/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/math-beast/id6757968352/reviews)** |
| Number of ratings | **4** | 1 |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | **Monthly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 59 MB | 57 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Truenary](https://appshunter.io/developer/1498574788) | [Scale9dev](https://appshunter.io/developer/1861605142) |

## What reviewers say

### DecisionMentor

[App page](https://appshunter.io/ios/app/decisionmentor/id1531462898)

This app helps you make complex decisions by breaking them down into criteria. It allows you to weigh pros and cons, prioritize objectives, and compare options scientifically. Get insights from others' decisions and use AI for research support.

**Highlights:** Multi-criteria decision making, Prioritize criteria and compare options, Identify pros and cons, AI-powered research support, Public decision feed, Decision Wheel Roulette

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Professional | $3.99 | per month |


### Math Beast

[App page](https://appshunter.io/ios/app/math-beast/id6757968352)

A fast and intuitive calculator app offering basic, scientific, and unit conversion modes. Personalize your experience with custom themes, haptics, and sound effects for everyday calculations, homework, or work.

**Highlights:** Basic calculator, Scientific calculator, Unit conversions, Calculation history, Custom themes, Haptics and sound effects

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Math Beast Basic | $1.99 | one-time |
| Math Beast Pro | $4.99 | one-time |


## Frequently asked questions

### Is DecisionMentor free?

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

### Is Math Beast free?

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

### Which has better reviews, DecisionMentor or Math Beast?

Math Beast is rated higher. DecisionMentor averages 4.0 out of 5 from 4 ratings, while Math Beast averages 5.0 from 1 ratings.

### Do DecisionMentor or Math Beast have ads?

DecisionMentor shows ads; Math Beast does not.

### Which is updated more often, DecisionMentor or Math Beast?

DecisionMentor ships an update every 5 weeks, and Math Beast monthly. Most recently, DecisionMentor was updated on September 24, 2026 and Math Beast on September 24, 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.*