# Scuba Exam vs SolidityHub

The clearest difference is price: Scuba Exam at $2.99 against SolidityHub's $7.99. Scuba Exam also leads on iOS requirement (12.3 vs 15.1). SolidityHub's advantage is update cadence (every 2 months vs every 3 months). On ads, in-app purchases and device support there is nothing between them.

Scuba Exam costs $2.99 and SolidityHub $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Scuba Exam ships an update every 3 months, SolidityHub every 2 months. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Scuba Exam | SolidityHub |
| --- | --- | --- |
| Price | **$2.99** | $7.99 |
| Rating | **[4.8 (62 ratings)](https://appshunter.io/ios/app/scuba-exam/id401421397/reviews)** | — |
| Number of ratings | **62** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free with in-app purchases | — |
| Size | 100 MB | 53 MB |
| Requires iOS | **12.3** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Boboshi AB](https://appshunter.io/developer/1657136131) | [SimTeCon GmbH](https://appshunter.io/developer/1761797043) |

## What reviewers say

### Scuba Exam

[App page](https://appshunter.io/ios/app/scuba-exam/id401421397)

Prepare for scuba diving certification exams with this comprehensive study aid. It covers essential diving theory, physics, and physiology, and includes a quiz with over 200 questions and detailed explanations. Learn to use dive tables and refresh your knowledge for safe diving.

**Highlights:** Scuba quiz with 250 illustrated questions, Detailed quiz results with explanations, Dive table guide (PADI, NAUI, SSI), Searchable scuba diving theory guide, Progress tracking and bookmarking

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

**In-app purchases:** none

**What reviewers like**

- 👍 Great for studying and reviewing
- 💡 Explanations for answers provided
- 👍 User-friendly interface
- 👍 Good for newbies and seasoned divers
- 👍 Helpful for preparing for exams

**What reviewers complain about**

- 🐛 Crashes frequently
- 🐛 Bugs and glitches
- 🐛 Inaccurate information sometimes
- 🐛 Metric conversion issues
- 🐛 Questions not always clear

**Reported bugs**

- App crashes a lot
- Freezing or crashing
- Keeps crushing when you use it
- App crashes when trying to access the app
- Entering definitions in 'Terms & Expressions' crashes the app

**Requested features**

- Include an advanced version
- Test on SAC rates, tank sizes/fills, lift calculations
- Test on tank expansion in F or C
- Test on pressure of 2 divers with different SAC rates
- Option to send periodic alerts with random questions


### SolidityHub

[App page](https://appshunter.io/ios/app/solidityhub/id6742271972)

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

**In-app purchases:** none


## Frequently asked questions

### Is Scuba Exam free?

Scuba Exam costs $2.99, with no in-app purchases.

### Is SolidityHub free?

SolidityHub costs $7.99, with no in-app purchases.

### Do Scuba Exam or SolidityHub have ads?

Neither Scuba Exam nor SolidityHub shows ads.

### Which is updated more often, Scuba Exam or SolidityHub?

Scuba Exam ships an update every 3 months, and SolidityHub every 2 months. Most recently, Scuba Exam was updated on October 27, 2026 and SolidityHub on October 28, 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.*