# Totality by Big Kid Science vs Gravity by Vaonis

The clearest difference is rating: Totality by Big Kid Science at 4.5 against Gravity by Vaonis's 2.7. Totality by Big Kid Science also leads on review sentiment (83% vs 48%). On price, ratings volume, update cadence and ads there is nothing between them.

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

Totality by Big Kid Science holds the better App Store score, 4.5 against 2.7. Both are backed by a comparable volume of ratings — 70 and 49 respectively. Written reviews point the same way: 83% of Totality by Big Kid Science's written reviews are positive against 48% of Gravity by Vaonis's.

Totality by Big Kid Science ships an update every 6 weeks, Gravity by Vaonis every 2 months. The most recent releases landed on August 12, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Totality by Big Kid Science | Gravity by Vaonis |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (70 ratings)](https://appshunter.io/ios/app/totality-by-big-kid-science/id1199242023/reviews)** | [2.7 (49 ratings)](https://appshunter.io/ios/app/gravity-by-vaonis/id6469513708/reviews) |
| Number of ratings | **70** | 49 |
| Positive reviews | **82.6% 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 | 91 MB | 331 MB |
| Requires iOS | 17.6 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Germinate LLC](https://appshunter.io/developer/1199242022) | [Vaonis](https://appshunter.io/developer/1369139518) |

## What reviewers say

### Totality by Big Kid Science

[App page](https://appshunter.io/ios/app/totality-by-big-kid-science/id1199242023)

Discover upcoming total solar eclipses worldwide with interactive maps and personalized viewing information. Learn about eclipse science, safe viewing practices, and find navigation tools to reach the path of totality. This free educational app also offers resources for educators and a shop for related books and viewing glasses.

**Highlights:** Interactive eclipse maps, Location-based viewing predictions, Navigation to path of totality, Eclipse science and safety information, Classroom activities, Shop for eclipse glasses and books

**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 Totality by Big Kid Science free?

Totality by Big Kid Science 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, Totality by Big Kid Science or Gravity by Vaonis?

Totality by Big Kid Science is rated higher. Totality by Big Kid Science averages 4.5 out of 5 from 70 ratings, while Gravity by Vaonis averages 2.7 from 49 ratings.

### Do Totality by Big Kid Science or Gravity by Vaonis have ads?

Neither Totality by Big Kid Science nor Gravity by Vaonis shows ads.

### Which is updated more often, Totality by Big Kid Science or Gravity by Vaonis?

Totality by Big Kid Science ships an update every 6 weeks, and Gravity by Vaonis every 2 months. Most recently, Totality by Big Kid Science was updated on August 12, 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.*