# HAM Test Prep Lite vs iSeismometer

The clearest difference is rating: HAM Test Prep Lite at 4.4 against iSeismometer's 3.6. HAM Test Prep Lite also leads on review sentiment (89% vs 76%). iSeismometer's advantage is monetization model (free vs free with in-app purchases) and ratings volume (172 vs 47). 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, 4.4 against 3.6. Both are backed by a comparable volume of ratings — 47 and 172 respectively. Written reviews point the same way: 89% of HAM Test Prep Lite's written reviews are positive against 76% of iSeismometer's.

Both ship on a similar rhythm, roughly every 7 months. The most recent releases landed on November 6, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | HAM Test Prep Lite | iSeismometer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (47 ratings)](https://appshunter.io/ios/app/ham-test-prep-lite-general/id303413935/reviews)** | [3.6 (172 ratings)](https://appshunter.io/ios/app/iseismometer-seismograph/id304190739/reviews) |
| Number of ratings | 47 | **172** |
| Positive reviews | **89.4% of reviews** | 76.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 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-general/id303413935)

Prepare for your Amateur Radio General license exam with practice questions and mock tests. Review FCC rule text and track your proficiency across question groups. This lite version includes a subset of the full question pool.

**Highlights:** General question pool practice, Practice exams, Proficiency tracking, Immediate feedback option, View FCC rule text, Zoomable figures, Dark mode support

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

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to learn and use
- 👍 Great for studying for exams
- 👍 Helpful for Technician and General licenses
- 👍 Mobile and convenient for on-the-go studying
- 👍 Provides confidence for tests

**What reviewers complain about**

- 👎 Free version is limited
- 👎 Only a subset of questions in free version
- 👎 Some questions lack necessary images (schematics)
- 👎 Not all test questions were in the study material
- 👎 App crashed iPod

**Reported bugs**

- App crashed iPod
- Some questions ask about schematic symbols but the necessary picture is not shown

**Requested features**

- Include schematic symbol images for relevant questions
- Consider a UK version


### iSeismometer

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

Transform your mobile device into a sensitive seismograph to measure vibrations and detect tremors. Analyze seismic data, view live feeds of earthquakes, and even stream readings to your Mac for comprehensive analysis. Ideal for educational exploration and understanding ground motion.

**Highlights:** Live seismograph with three axes, Event detection for tremors, Automatic recording and export, Live USGS earthquake feed, Stream data to Mac, Gravity filter and live spectrum analysis

**Features:** Vision Pro support, iPhone Duo 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 4.4 out of 5 from 47 ratings, while iSeismometer averages 3.6 from 172 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 7 months, and iSeismometer every 7 months. Most recently, HAM Test Prep Lite was updated on November 6, 2026 and iSeismometer on November 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.*