# HAM Test Prep vs Uncertainty Calculator

The clearest difference is ratings volume: HAM Test Prep at 807 against Uncertainty Calculator's 1. HAM Test Prep also leads on chart position (#181 vs unranked) and price ($1.99 vs $3.99). Uncertainty Calculator's advantage is update cadence (every 3 months vs every 7 months). On rating, ads, in-app purchases and device support 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 807 ratings behind it against 1, so its average is the more settled of the two.

HAM Test Prep ships an update every 7 months, Uncertainty Calculator every 3 months. The most recent releases landed on October 26, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | HAM Test Prep | Uncertainty Calculator |
| --- | --- | --- |
| Price | **$1.99** | $3.99 |
| Rating | [4.9 (807 ratings)](https://appshunter.io/ios/app/ham-test-prep-technician/id297951496/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/uncertainty-calculator/id1170905440/reviews)** |
| Number of ratings | **807** | 1 |
| Positive reviews | 98.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 months** |
| Monetization | **Free** | Paid |
| Best chart rank | **#181** | — |
| Size | 3 MB | 1 MB |
| Requires iOS | 18.6 | **17.0** |
| Devices | iPhone, iPad | 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-technician/id297951496)

**Currently charting:** #181 Top Paid · Education (US App Store)

Prepare for your amateur radio Technician license exam with a comprehensive question pool and practice tests. Identify weak areas, review FCC rules, and practice with adjustable settings. Optimized for mobile devices with accessibility features.

**Highlights:** Technician question pool (July 2022-June 2026), Practice exams with immediate feedback, Proficiency tracking by question group, View FCC rule text, Zoomable and pannable figures, Resume in-progress tests, Accessibility options

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Excellent exam prep
- 👍 Easy to use
- 💡 Helpful diagnostics and feedback
- 🚀 Efficient study process
- 👍 Great practice tests

**What reviewers complain about**

- 🐛 Lack of explanations for wrong answers
- 🔍 Repetitive questions in practice tests
- 📱 Not available on desktop/web

**Reported bugs**

- Login screen freezes
- Incompatibility with older devices

**Requested features**

- Online/web version of the app
- Explanations for incorrect answers
- More diverse practice test questions


### 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 807 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 7 months, and Uncertainty Calculator every 3 months. Most recently, HAM Test Prep was updated on October 26, 2026 and Uncertainty Calculator on October 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.*