# gravity detector vs Hubble Space Telescope Tracker

The clearest difference is rating: gravity detector at 5.0 against Hubble Space Telescope Tracker's 1.0. gravity detector also leads on in-app purchases (none vs 1) and ads (none vs shown). On price, ratings volume, device support and iOS requirement there is nothing between them.

Both are free to download. Hubble Space Telescope Tracker sells 1 one-off in-app purchase. gravity detector asks for nothing beyond the download.

gravity detector holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 2 and 2 respectively.

## The numbers

| Metric | gravity detector | Hubble Space Telescope Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/gravity-detector/id1480160202/reviews)** | [1.0 (2 ratings)](https://appshunter.io/ios/app/hubble-space-telescope-tracker/id6468819172/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | — | Every 3 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 18 MB | 72 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [乃君 黄](https://appshunter.io/developer/1337343608) | [KAKHA GIORGASHVILI](https://appshunter.io/developer/1501353984) |

## What reviewers say

### gravity detector

[App page](https://appshunter.io/ios/app/gravity-detector/id1480160202)

Measure the G-force experienced in elevators or planes and compare it to planetary gravity. Record environmental photos, videos, and coordinates to save for later reference, and view G-values on a map.

**Highlights:** Measure G-force in real-time, Compare G-force to planetary gravity, Record environmental photos and videos, Save location coordinates, View G-values on a map

**In-app purchases:** none


### Hubble Space Telescope Tracker

[App page](https://appshunter.io/ios/app/hubble-space-telescope-tracker/id6468819172)

Follow NASA's Hubble Space Telescope mission in real time. Explore a gallery of stunning images, engage in discussions, and learn about space. Receive notifications for new discoveries and test your knowledge with quizzes.

**Highlights:** Real-time mission progress, Image gallery, Discussion forums, Notifications for new images, 3D Solar system model, Ask an Astronomer feature

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $2.99 | one-time |


## Frequently asked questions

### Is gravity detector free?

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

### Is Hubble Space Telescope Tracker free?

Hubble Space Telescope Tracker is free to download, with in-app purchases available.

### Which has better reviews, gravity detector or Hubble Space Telescope Tracker?

gravity detector is rated higher. gravity detector averages 5.0 out of 5 from 2 ratings, while Hubble Space Telescope Tracker averages 1.0 from 2 ratings.

### Do gravity detector or Hubble Space Telescope Tracker have ads?

Hubble Space Telescope Tracker shows ads; gravity detector does not.

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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.*