# iSeismometer vs StellarVana

The clearest difference is rating: StellarVana at 5.0 against iSeismometer's 3.6. StellarVana also leads on update cadence (every 3 weeks vs every 7 months) and review sentiment (100% vs 76%). iSeismometer's advantage is in-app purchases (none vs 2) and ratings volume (170 vs 4). On price, ads and device support there is nothing between them.

Both are free to download. StellarVana sells 2 in-app purchases, starting at $4.99 per month. iSeismometer asks for nothing beyond the download.

StellarVana holds the better App Store score, 5.0 against 3.6. That said, the two scores are not equally well evidenced: iSeismometer has 170 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 76% of iSeismometer's written reviews are positive against 100% of StellarVana's.

iSeismometer ships an update every 7 months, StellarVana every 3 weeks. The most recent releases landed on October 17, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | iSeismometer | StellarVana |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.6 (170 ratings)](https://appshunter.io/ios/app/iseismometer/id304190739/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/stellarvana-star-map/id6808117808/reviews)** |
| Number of ratings | **170** | 4 |
| Positive reviews | 76.5% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 3 MB | 13 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ObjectGraph LLC](https://appshunter.io/developer/284700705) | [Gary Saggu](https://appshunter.io/developer/465733546) |

## What reviewers say

### iSeismometer

[App page](https://appshunter.io/ios/app/iseismometer/id304190739)

Transform your iPhone into a sensitive seismometer to detect and visualize vibrations. Explore its educational and data-collecting capabilities for fun or serious applications.

**Highlights:** Converts iPhone to seismometer, Detects and visualizes vibrations, Data collecting capabilities, Educational use, Adjustable frequency settings, Re-track previous data, X-Y-Z illustrated graphs

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Sensitive and accurate
- 👍 Simple and easy to use
- 💡 Useful for various applications (e.g. monitoring vibrations, detecting heartbeat)

**What reviewers complain about**

- 🐛 Crashes or freezes on newer devices
- 🔋 High battery consumption
- 🔒 Lacks security/privacy features (e.g. no option to disable data transmission)

**Reported bugs**

- Buttons/controls not working on newer iOS versions
- Keyboard not appearing in text input fields
- Inconsistent performance across device models

**Requested features**

- Add sensitivity control
- Implement zero control for reference plane
- Increase recording time
- Improve UI/UX (e.g. color coding, scrolling, chart speed control)
- Implement Richter scale or other measurement units


### StellarVana

[App page](https://appshunter.io/ios/app/stellarvana-star-map/id6808117808)

Explore the night sky with a dynamic celestial map. Identify stars, planets, and constellations in real-time. Plan observations and learn about astronomical events like eclipses.

**Highlights:** Live sky map identification, Constellation and object search, Eclipse countdowns and visibility, Tonight's observation planner, Educational astronomy topics, Night-vision red mode

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| StellarVana Premium monthly | $4.99 | per month |
| StellarVana Premium Annual | $39.99 | per year |


## Frequently asked questions

### Is iSeismometer free?

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

### Is StellarVana free?

StellarVana is free to download, with in-app purchases available.

### Which has better reviews, iSeismometer or StellarVana?

StellarVana is rated higher. iSeismometer averages 3.6 out of 5 from 170 ratings, while StellarVana averages 5.0 from 4 ratings.

### Do iSeismometer or StellarVana have ads?

Neither iSeismometer nor StellarVana shows ads.

### Which is updated more often, iSeismometer or StellarVana?

iSeismometer ships an update every 7 months, and StellarVana every 3 weeks. Most recently, iSeismometer was updated on October 17, 2026 and StellarVana on October 10, 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.*