# HAM Test Prep vs Uncertainty Calculator

The clearest difference is ratings volume: HAM Test Prep at 575 against Uncertainty Calculator's 1. HAM Test Prep also leads on price ($1.99 vs $3.99) and iOS requirement (15.5 vs 17.0). On rating, update cadence, ads and in-app purchases there is nothing between them.

HAM Test Prep costs $1.99 and Uncertainty Calculator $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.9 for HAM Test Prep against 5.0 for Uncertainty Calculator. That said, the two scores are not equally well evidenced: HAM Test Prep has 575 ratings behind it against 1, so its average is the more settled of the two.

HAM Test Prep ships an update every 6 months, Uncertainty Calculator every 3 months. The most recent releases landed on September 21, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | HAM Test Prep | Uncertainty Calculator |
| --- | --- | --- |
| Price | **$1.99** | $3.99 |
| Rating | [4.9 (575 ratings)](https://appshunter.io/ios/app/ham-test-prep-general/id298756574/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/uncertainty-calculator/id1170905440/reviews)** |
| Number of ratings | **575** | 1 |
| Positive reviews | 96.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 months** |
| Monetization | Paid | Paid |
| Size | 3 MB | 1 MB |
| Requires iOS | **15.5** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Patrick J Maloney LLC](https://appshunter.io/developer/297951499) | [Roman Volinsky](https://appshunter.io/developer/977951850) |

## What reviewers say

### HAM Test Prep

[App page](https://appshunter.io/ios/app/ham-test-prep-general/id298756574)

Prepare for your Amateur Radio General license exam with a comprehensive question pool and practice tests. Review FCC rules, track your proficiency, and customize your study sessions. Includes features for vision-impaired users and dark mode support.

**Highlights:** General question pool access, Practice exams, Proficiency tracking, Immediate feedback option, View FCC rule text, Zoomable figures, Accessibility options

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Excellent exam prep
- 👍 Very handy and easy to use
- 🎉 Helped pass exams on first try
- 📚 Great study guide and training aid
- 🏆 Effective way to learn and prepare

**What reviewers complain about**

- 🔀 Randomize answers needed in practice tests
- 📊 Inconsistent progress tracking in study sections

**Reported bugs**

- Occasional app crashes or freezes
- Inconsistent behavior between iPhone and iPad versions

**Requested features**

- Add randomize answers option for practice tests
- Improve progress tracking and reset functionality in study sections


### Uncertainty Calculator

[App page](https://appshunter.io/ios/app/uncertainty-calculator/id1170905440)

This app allows users to perform error propagation calculations for mathematical expressions involving uncertain variables. It supports absolute and relative error inputs, various functions, and trigonometric calculations in degrees or radians. The tool helps ensure accurate reporting of results based on estimated errors.

**Highlights:** Error propagation calculations, Absolute and relative error input, Support for mathematical functions, Trigonometric calculations (degrees/radians), Variable combination in expressions, Significant figure guidance

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

**In-app purchases:** none


## Frequently asked questions

### Is HAM Test Prep free?

HAM Test Prep costs $1.99, with no in-app purchases.

### Is Uncertainty Calculator free?

Uncertainty Calculator costs $3.99, with no in-app purchases.

### Which has better reviews, HAM Test Prep or Uncertainty Calculator?

Uncertainty Calculator is rated higher. HAM Test Prep averages 4.9 out of 5 from 575 ratings, while Uncertainty Calculator averages 5.0 from 1 ratings.

### Do HAM Test Prep or Uncertainty Calculator have ads?

Neither HAM Test Prep nor Uncertainty Calculator shows ads.

### Which is updated more often, HAM Test Prep or Uncertainty Calculator?

HAM Test Prep ships an update every 6 months, and Uncertainty Calculator every 3 months. Most recently, HAM Test Prep was updated on September 21, 2026 and Uncertainty Calculator on September 14, 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.*