# Earthtunes vs Gravity by Vaonis

The clearest difference is rating: Earthtunes at 5.0 against Gravity by Vaonis's 2.7. Earthtunes also leads on device support (3 vs 1). Gravity by Vaonis's advantage is ratings volume (49 vs 7). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Earthtunes holds the better App Store score, 5.0 against 2.7. That said, the two scores are not equally well evidenced: Gravity by Vaonis has 49 ratings behind it against 7, so its average is the more settled of the two.

Earthtunes ships an update every 3 months, Gravity by Vaonis every 2 months. Both last shipped on September 24, 2026.

## The numbers

| Metric | Earthtunes | Gravity by Vaonis |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (7 ratings)](https://appshunter.io/ios/app/earthtunes/id1529159097/reviews)** | [2.7 (49 ratings)](https://appshunter.io/ios/app/gravity-by-vaonis/id6469513708/reviews) |
| Number of ratings | 7 | **49** |
| Positive reviews | — | 47.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 20 MB | 331 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Northwestern University](https://appshunter.io/developer/348646676) | [Vaonis](https://appshunter.io/developer/1369139518) |

## What reviewers say

### Earthtunes

[App page](https://appshunter.io/ios/app/earthtunes/id1529159097)

Explore the Earth's hidden sounds by amplifying low-frequency seismic waves. This app transforms inaudible geological vibrations into audible pitches, offering a unique auditory experience of our planet's inner workings. Discover the fascinating acoustic phenomena generated by environmental sources and seismic events.

**Highlights:** Listen to inaudible seismic waves, Amplify low-frequency sounds, Experience Earth's geological vibrations, Understand seismic wave origins, Fascinating auditory exploration

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

**In-app purchases:** none


### Gravity by Vaonis

[App page](https://appshunter.io/ios/app/gravity-by-vaonis/id6469513708)

Transform your smartphone into a smart telescope to explore the cosmos. Capture stunning images of galaxies, nebulae, and star clusters with advanced image stacking. Observe the Sun and Moon with dedicated modes and educational content.

**Highlights:** Smartphone as smart telescope, 25x optical zoom, Live image stacking, Sun and Moon observation, Deep sky object photography, Landscape and wildlife photography, Educational cosmic content

**In-app purchases:** none


## Frequently asked questions

### Is Earthtunes free?

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

### Is Gravity by Vaonis free?

Gravity by Vaonis is free to download, with no in-app purchases.

### Which has better reviews, Earthtunes or Gravity by Vaonis?

Earthtunes is rated higher. Earthtunes averages 5.0 out of 5 from 7 ratings, while Gravity by Vaonis averages 2.7 from 49 ratings.

### Do Earthtunes or Gravity by Vaonis have ads?

Neither Earthtunes nor Gravity by Vaonis shows ads.

### Which is updated more often, Earthtunes or Gravity by Vaonis?

Earthtunes ships an update every 3 months, and Gravity by Vaonis every 2 months. Most recently, Earthtunes was updated on September 24, 2026 and Gravity by Vaonis on September 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*