# SD Talks vs Earth and Science

The clearest difference is price: SD Talks at Free against Earth and Science's $4.99. SD Talks also leads on update cadence (every 5 months vs every 15 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

SD Talks is free to download; Earth and Science costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SD Talks ships an update every 5 months, Earth and Science every 15 months. The most recent releases landed on November 11, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | SD Talks | Earth and Science |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | — | **[3.5 (4 ratings)](https://appshunter.io/ios/app/earth-and-science/id1573185816/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 16.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 15 months |
| Monetization | — | Paid |
| Size | 8 MB | 188 MB |
| Requires iOS | **8.0** | 9.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 9+ | 4+ |
| Developer | [UNSSC](https://appshunter.io/developer/995216559) | [Landka](https://appshunter.io/developer/450345696) |

## What reviewers say

### SD Talks

[App page](https://appshunter.io/ios/app/sd-talks/id1058885248)

**Features:** macOS Compatibility

**In-app purchases:** none


### Earth and Science

[App page](https://appshunter.io/ios/app/earth-and-science/id1573185816)

Explore Earth, space, and life sciences through interactive animations and detailed images. This educational app simplifies complex concepts across biology, geology, and astronomy with over twenty chapters.

**Highlights:** Interactive animations, Detailed images of structures, Covers biology, geology, and astronomy, Explains complex scientific phenomena, Over twenty chapters of content

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is SD Talks free?

SD Talks is free to download, with no in-app purchases.

### Is Earth and Science free?

Earth and Science costs $4.99, with no in-app purchases.

### Do SD Talks or Earth and Science have ads?

Neither SD Talks nor Earth and Science shows ads.

### Which is updated more often, SD Talks or Earth and Science?

SD Talks ships an update every 5 months, and Earth and Science every 15 months. Most recently, SD Talks was updated on November 11, 2026 and Earth and 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.*