# Unistellar vs Gravity by Vaonis

The clearest difference is rating: Unistellar at 3.8 against Gravity by Vaonis's 2.7. Gravity by Vaonis's advantage is iOS requirement (16.0 vs 18.0). On price, review sentiment, ratings volume and update cadence there is nothing between them.

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

Unistellar holds the better App Store score, 3.8 against 2.7. Both are backed by a comparable volume of ratings — 100 and 49 respectively. Written reviews complicate that: 45% of Unistellar's written reviews are positive against 48% of Gravity by Vaonis's, so the app with the better star average is not the one people write more warmly about.

Unistellar ships an update every 6 weeks, Gravity by Vaonis every 2 months. The most recent releases landed on August 14, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Unistellar | Gravity by Vaonis |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (100 ratings)](https://appshunter.io/ios/app/unistellar/id1435141427/reviews)** | [2.7 (49 ratings)](https://appshunter.io/ios/app/gravity-by-vaonis/id6469513708/reviews) |
| Number of ratings | **100** | 49 |
| Positive reviews | 44.8% of reviews | **47.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | Free | Free |
| Size | 584 MB | 331 MB |
| Requires iOS | 18.0 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Unistellar](https://appshunter.io/developer/1384354590) | [Vaonis](https://appshunter.io/developer/1369139518) |

## What reviewers say

### Unistellar

[App page](https://appshunter.io/ios/app/unistellar/id1435141427)

Control your smart telescope, explore thousands of celestial objects, and observe them live. Save and share your discoveries, or contribute to real scientific research with citizen science missions.

**Highlights:** Telescope control, Explore 5000+ celestial objects, Live astronomical observation, Instant image sharing, RAW image download, Citizen science missions

**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 Unistellar free?

Unistellar 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, Unistellar or Gravity by Vaonis?

Unistellar is rated higher. Unistellar averages 3.8 out of 5 from 100 ratings, while Gravity by Vaonis averages 2.7 from 49 ratings.

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

Neither Unistellar nor Gravity by Vaonis shows ads.

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

Unistellar ships an update every 6 weeks, and Gravity by Vaonis every 2 months. Most recently, Unistellar was updated on August 14, 2026 and Gravity by Vaonis on September 24, 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.*