# HAM Test Prep Lite vs iSeismometer

The clearest difference is rating: HAM Test Prep Lite at 4.6 against iSeismometer's 3.6. HAM Test Prep Lite also leads on review sentiment (93% vs 76%). iSeismometer's advantage is monetization model (free vs free with in-app purchases) and ratings volume (170 vs 24). 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.

HAM Test Prep Lite holds the better App Store score, 4.6 against 3.6. That said, the two scores are not equally well evidenced: iSeismometer has 170 ratings behind it against 24, so its average is the more settled of the two. Written reviews point the same way: 93% of HAM Test Prep Lite's written reviews are positive against 76% of iSeismometer's.

HAM Test Prep Lite ships an update every 5 months, iSeismometer every 7 months. The most recent releases landed on September 18, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | HAM Test Prep Lite | iSeismometer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (24 ratings)](https://appshunter.io/ios/app/ham-test-prep-lite-extra/id303414909/reviews)** | [3.6 (170 ratings)](https://appshunter.io/ios/app/iseismometer/id304190739/reviews) |
| Number of ratings | 24 | **170** |
| Positive reviews | **92.5% of reviews** | 76.4% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 7 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 3 MB | 3 MB |
| Requires iOS | **15.5** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Patrick J Maloney LLC](https://appshunter.io/developer/297951499) | [ObjectGraph LLC](https://appshunter.io/developer/284700705) |

## What reviewers say

### HAM Test Prep Lite

[App page](https://appshunter.io/ios/app/ham-test-prep-lite-extra/id303414909)

Prepare for your Amateur Radio Extra license exam with practice questions and tests. Review FCC rule text, track your proficiency, and utilize features like zoomable figures and immediate feedback. This lite version offers a sample of the full question pool.

**Highlights:** Practice question pool, Practice exams, Proficiency tracking, Immediate feedback option, Zoomable figures, Viewable FCC rule text, Resumable practice tests

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is HAM Test Prep Lite free?

HAM Test Prep Lite is free to download, with no in-app purchases.

### Is iSeismometer free?

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

### Which has better reviews, HAM Test Prep Lite or iSeismometer?

HAM Test Prep Lite is rated higher. HAM Test Prep Lite averages 4.6 out of 5 from 24 ratings, while iSeismometer averages 3.6 from 170 ratings.

### Do HAM Test Prep Lite or iSeismometer have ads?

Neither HAM Test Prep Lite nor iSeismometer shows ads.

### Which is updated more often, HAM Test Prep Lite or iSeismometer?

HAM Test Prep Lite ships an update every 5 months, and iSeismometer every 7 months. Most recently, HAM Test Prep Lite was updated on September 18, 2026 and iSeismometer on September 29, 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.*