# Scuba Exam vs SonLerni

The clearest difference is price: SonLerni at Free against Scuba Exam's $2.99. SonLerni also leads on update cadence (weekly vs every 3 months) and review sentiment (100% vs 83%). Scuba Exam's advantage is in-app purchases (none vs 2) and ads (none vs shown). On rating, monetization model and device support there is nothing between them.

SonLerni is free to download; Scuba Exam costs $2.99 up front. SonLerni sells 1 in-app purchase, starting at $59.99 per year. Scuba Exam asks for nothing beyond the download.

SonLerni holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Scuba Exam has 62 ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 83% of Scuba Exam's written reviews are positive against 100% of SonLerni's.

Scuba Exam ships an update every 3 months, SonLerni weekly. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Scuba Exam | SonLerni |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [4.8 (62 ratings)](https://appshunter.io/ios/app/scuba-exam/id401421397/reviews) | **[5.0 (10 ratings)](https://appshunter.io/ios/app/sonlerni-language-immersion/id6751362941/reviews)** |
| Number of ratings | **62** | 10 |
| Positive reviews | 83.3% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 100 MB | 81 MB |
| Requires iOS | **12.3** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Boboshi AB](https://appshunter.io/developer/1657136131) | [Sonlerni LLC](https://appshunter.io/developer/1834763719) |

## 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


### SonLerni

[App page](https://appshunter.io/ios/app/sonlerni-language-immersion/id6751362941)

Improve your listening comprehension in French, Spanish, German, and English with authentic audio and AI-powered explanations. Learn through real conversations and podcasts, with transcripts and study tools to reinforce understanding. Designed for intermediate learners to bridge the gap between reading and understanding native speakers.

**Highlights:** Authentic audio and podcasts, AI-powered explanations, Transcripts for listening support, Vocabulary review tools, Adjustable playback speed, Focus on real-world comprehension

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Yearly Subscription | $59.99 | per year |


## Frequently asked questions

### Is Scuba Exam free?

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

### Is SonLerni free?

SonLerni is free to download, with in-app purchases available.

### Which has better reviews, Scuba Exam or SonLerni?

SonLerni is rated higher. Scuba Exam averages 4.8 out of 5 from 62 ratings, while SonLerni averages 5.0 from 10 ratings.

### Do Scuba Exam or SonLerni have ads?

SonLerni shows ads; Scuba Exam does not.

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

Scuba Exam ships an update every 3 months, and SonLerni weekly. Most recently, Scuba Exam was updated on November 1, 2026 and SonLerni on November 5, 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.*