# Flash Mental Math vs Take Shelter

The clearest difference is price: Flash Mental Math at Free against Take Shelter's $1.99. Flash Mental Math also leads on ratings volume (20 vs 2). Take Shelter's advantage is ads (none vs shown) and rating (5.0 vs 4.6). On update cadence, in-app purchases and device support there is nothing between them.

Flash Mental Math is free to download; Take Shelter costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Take Shelter holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Flash Mental Math has 20 ratings behind it against 2, so its average is the more settled of the two.

Flash Mental Math ships an update every 3 months, Take Shelter every 4 months. The most recent releases landed on November 7, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Flash Mental Math | Take Shelter |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [4.6 (20 ratings)](https://appshunter.io/ios/app/flash-mental-math-simple/id1547944841/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/take-shelter/id1612791681/reviews)** |
| Number of ratings | **20** | 2 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | **Ad-supported** | Paid |
| Size | 14 MB | 32 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ryouhei Azuma](https://appshunter.io/developer/1353297781) | [N Craig](https://appshunter.io/developer/662087503) |

## What reviewers say

### Flash Mental Math

[App page](https://appshunter.io/ios/app/flash-mental-math-simple/id1547944841)

Practice mental arithmetic with various difficulty levels and custom modes. This app serves as a brain training tool to enhance calculation skills.

**Highlights:** Mental arithmetic practice, Easy, normal, and difficult modes, Customizable modes, Brain training, Calculation skill improvement

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

**In-app purchases:** none


### Take Shelter

[App page](https://appshunter.io/ios/app/take-shelter/id1612791681)

This app provides comprehensive guidance on nuclear survival, covering everything from understanding nuclear explosions to preparing essential supplies and identifying safe shelters. It aims to equip users with the knowledge and skills needed to increase their chances of survival in the event of a nuclear attack.

**Highlights:** Nuclear explosion stages, Shelter suitability, Survival supply requirements, Global nuclear weapon data, Nuclear attack procedures, Survival kit checklists

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

**In-app purchases:** none


## Frequently asked questions

### Is Flash Mental Math free?

Flash Mental Math is free to download, with no in-app purchases.

### Is Take Shelter free?

Take Shelter costs $1.99, with no in-app purchases.

### Which has better reviews, Flash Mental Math or Take Shelter?

Take Shelter is rated higher. Flash Mental Math averages 4.6 out of 5 from 20 ratings, while Take Shelter averages 5.0 from 2 ratings.

### Do Flash Mental Math or Take Shelter have ads?

Flash Mental Math shows ads; Take Shelter does not.

### Which is updated more often, Flash Mental Math or Take Shelter?

Flash Mental Math ships an update every 3 months, and Take Shelter every 4 months. Most recently, Flash Mental Math was updated on November 7, 2026 and Take Shelter on November 5, 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.*