# Big Math vs Montessori Science

The clearest difference is price: Montessori Science at Free against Big Math's $1.99. Montessori Science also leads on update cadence (fortnightly vs every 11 months) and device support (3 vs 1). Big Math's advantage is in-app purchases (none vs 3). On ads there is nothing between them.

Montessori Science is free to download; Big Math costs $1.99 up front. Montessori Science sells 3 in-app purchases, starting at $3.99 per month. Big Math asks for nothing beyond the download.

Big Math ships an update every 11 months, Montessori Science fortnightly. The most recent releases landed on November 10, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Big Math | Montessori Science |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/montessori-science/id1579353054/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 months | **Fortnightly** |
| Monetization | — | Freemium |
| Size | 18 MB | 431 MB |
| Requires iOS | 15.6 | **12.1** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Eaglet LLC](https://appshunter.io/developer/449193510) | [Rantek Inc.](https://appshunter.io/developer/319592818) |

## What reviewers say

### Big Math

[App page](https://appshunter.io/ios/app/big-math/id591862472)

**Features:** macOS Compatibility

**In-app purchases:** none


### Montessori Science

[App page](https://appshunter.io/ios/app/montessori-science/id1579353054)

Explore science through interactive Montessori-inspired lessons for ages 3 and up. Learn about planets, landforms, seasons, plants, animals, and the human body with self-guided, self-correcting activities. Designed for home and classroom use.

**Highlights:** Interactive science activities, Montessori-inspired lessons, Self-guided learning, Self-correcting exercises, Covers planets, landforms, seasons, plants, animals, human body, Audio facts for non-readers

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Montessori Science Monthly Sub | $3.99 | per month |
| Montessori Science Monthly | $3.99 | per month |
| Montessori Science Yearly Sub | $39.99 | per year |


## Frequently asked questions

### Is Big Math free?

Big Math costs $1.99, with no in-app purchases.

### Is Montessori Science free?

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

### Do Big Math or Montessori Science have ads?

Neither Big Math nor Montessori Science shows ads.

### Which is updated more often, Big Math or Montessori Science?

Big Math ships an update every 11 months, and Montessori Science fortnightly. Most recently, Big Math was updated on November 10, 2026 and Montessori Science on November 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.*