# Basic Theory Test SG vs Math Marvels

The clearest difference is in-app purchases: Math Marvels at none against Basic Theory Test SG's 1. Basic Theory Test SG's advantage is update cadence (every 10 days vs every 5 weeks) and iOS requirement (13.0 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. Basic Theory Test SG sells 1 in-app purchase, starting at $4.99 per month. Math Marvels asks for nothing beyond the download.

Basic Theory Test SG ships an update every 10 days, Math Marvels every 5 weeks. The most recent releases landed on September 13, 2026 and August 10, 2026 respectively.

## The numbers

| Metric | Basic Theory Test SG | Math Marvels |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 5 weeks |
| Size | 61 MB | 30 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [osman rmak](https://appshunter.io/developer/1890153069) | [Darsh Choudhary](https://appshunter.io/developer/6784593266) |

## What reviewers say

### Basic Theory Test SG

[App page](https://appshunter.io/ios/app/basic-theory-test-sg-btt-ftt/id6761528034)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Access | $4.99 | per month |


### Math Marvels

[App page](https://appshunter.io/ios/app/math-marvels/id6784593264)

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

**In-app purchases:** none


## Frequently asked questions

### Is Basic Theory Test SG free?

Basic Theory Test SG is free to download, with in-app purchases available.

### Is Math Marvels free?

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

### Do Basic Theory Test SG or Math Marvels have ads?

Neither Basic Theory Test SG nor Math Marvels shows ads.

### Which is updated more often, Basic Theory Test SG or Math Marvels?

Basic Theory Test SG ships an update every 10 days, and Math Marvels every 5 weeks. Most recently, Basic Theory Test SG was updated on September 13, 2026 and Math Marvels on August 10, 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.*