# Gravity Guards vs Smart Science

The clearest difference is update cadence: Smart Science at monthly against Gravity Guards's every 4 months. Smart Science also leads on iOS requirement (13.0 vs 16.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Gravity Guards sells 13 one-off in-app purchases and Smart Science sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Gravity Guards ships an update every 4 months, Smart Science monthly. The most recent releases landed on October 27, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Gravity Guards | Smart Science |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/gravity-guards-science-idle/id6593686824/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Size | 296 MB | 190 MB |
| Requires iOS | 16.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 9+ | 4+ |
| Developer | [Valeriy Kuznetsov](https://appshunter.io/developer/1760340772) | [Oxford EduVision (M)](https://appshunter.io/developer/1784194586) |

## What reviewers say

### Gravity Guards

[App page](https://appshunter.io/ios/app/gravity-guards-science-idle/id6593686824)

Engage in an epic auto-battler strategy game where you assemble a team of legendary scientists to learn and apply physics principles. Battle rogue Omnics and protect the world by harnessing scientific forces in a fun, interactive adventure.

**Highlights:** Learn physics through engaging gameplay, Assemble legendary scientist characters, Auto-battler strategy with physics mechanics, Interactive learning and smart battles, Gamified education for all ages, Teacher and parent-approved content

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

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Röntgoum's Project | $0.99 | one-time |
| Crystals (100) | $0.99 | one-time |
| Box of Lights | $0.99 | one-time |
| Röntgoum's Project | $1.99 | one-time |
| Röntgoum's Project Sale | $2.99 | one-time |
| Quantum Generator Pack | $2.99 | one-time |
| Crystals (100) | $4.99 | one-time |
| Röntgoum's Project | $5.99 | one-time |
| Flow Pact Bundle | $5.99 | one-time |
| Crystals (1000) | $7.99 | one-time |
| Mind Modulator | $9.99 | one-time |
| Crystals (5000) | $39.99 | one-time |
| Crystals (10000) | $69.99 | one-time |


### Smart Science

[App page](https://appshunter.io/ios/app/smart-science/id6752447215)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Science Full Version | Free | one-time |


## Frequently asked questions

### Is Gravity Guards free?

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

### Is Smart Science free?

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

### Do Gravity Guards or Smart Science have ads?

Neither Gravity Guards nor Smart Science shows ads.

### Which is updated more often, Gravity Guards or Smart Science?

Gravity Guards ships an update every 4 months, and Smart Science monthly. Most recently, Gravity Guards was updated on October 27, 2026 and Smart Science on October 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.*