# HAM Test Prep Lite vs iSeismometer

The clearest difference is rating: HAM Test Prep Lite at 4.7 against iSeismometer's 3.6. HAM Test Prep Lite also leads on review sentiment (88% vs 76%). iSeismometer's advantage is monetization model (free vs free with in-app purchases) and iOS requirement (16.0 vs 18.6). 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.

HAM Test Prep Lite holds the better App Store score, 4.7 against 3.6. Both are backed by a comparable volume of ratings — 167 and 170 respectively. Written reviews point the same way: 88% of HAM Test Prep Lite's written reviews are positive against 76% of iSeismometer's.

HAM Test Prep Lite ships an update every 8 months, iSeismometer every 7 months. The most recent releases landed on September 8, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | HAM Test Prep Lite | iSeismometer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (167 ratings)](https://appshunter.io/ios/app/ham-test-prep-lite-technician/id303413588/reviews)** | [3.6 (170 ratings)](https://appshunter.io/ios/app/iseismometer/id304190739/reviews) |
| Number of ratings | 167 | **170** |
| Positive reviews | **87.7% of reviews** | 76.4% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 7 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 3 MB | 3 MB |
| Requires iOS | 18.6 | **16.0** |
| Devices | iPhone, iPad | **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-technician/id303413588)

Prepare for your amateur radio Technician license exam with practice questions and tests. Review FCC rules, track your progress, and identify areas needing more study. This version includes a portion of the question pool, with a full version available for purchase.

**Highlights:** Technician question pool, Practice exams, Progress tracking, Immediate feedback, FCC rule text viewer, Zoomable figures, Dark mode support

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

**In-app purchases:** none

**What reviewers like**

- 👍 Great for passing tests
- 👍 Excellent study tool
- 👍 Helpful for preparation
- 👍 Easy to use
- 👍 Great practice test

**What reviewers complain about**

- 💰 Paid version expensive
- ❓ Free version limited
- 🐛 Inconsistent answers
- 🐛 Clunky interface
- ❓ Unclear test completion

**Reported bugs**

- Correct answer changes
- Clunky interface
- Hard to see green letters (correct answers)
- Free version useless

**Requested features**

- More features for free app
- More test variety
- Ability to run subset of questions
- Clearer test completion indicator


### 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 4.7 out of 5 from 167 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 8 months, and iSeismometer every 7 months. Most recently, HAM Test Prep Lite was updated on September 8, 2026 and iSeismometer on September 17, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*