Comparison

Scuba Exam vs SonLerni

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Scuba Exam

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
Read full description

SCUBA EXAM "An ideal helper for beginners who need to pass certification tests" – nytimes.com "I would recommend this app to anyone, whether you’re looking to get certified or just want to brush up on theory and test your knowledge." – scubadiving.com "Scuba Exam is a fun application, well thought out and well written. An excellent study aid and great to brush up your knowledge." – scubadiverlife.com SCUBA EXAM - LEARN ABOUT SCUBA DIVING ON YOUR IPHONE Are you planning to become a certified scuba diver? Scuba Exam will help you pass any Open Water Diver course in the world by teaching you basic diving theory and quizzing you on it. Do you plan to travel somewhere to learn how to scuba dive? By studying with Scuba Exam at home, before your course begins, you won't have to spend as much valuable vacation time studying! Already have a scuba certification but haven't been diving in a while? With Scuba Exam you can easily test and refresh your knowledge in a fun and intuitive way! Scuba Exam is developed in cooperation with Tec Clark, diving expert and founder of ScubaGuru.com. As an award-winning diving instructor Tec brings his passion for education into this app as you will learn about diving equipment, physics, physiology, environment and decompression theory. MAIN FEATURES - Developed in cooperation with leading scuba diving educator Tec Clark. - Scuba Quiz with 250 illustrated questions similar to those on the real exam. - Detailed quiz results complete with educational explanations. - A quiz bank and guide that will teach you how to understand and use dive tables from PADI, NAUI and SSI in both feet and meters. - An extensive, easily navigated and searchable guide to basic scuba diving theory. SCUBA QUIZ The Scuba Exam quiz contains over 200 general diving questions similar to those on the real exam, covering essential topics such as hand signals, how to dive safely without endangering yourself or others, the physics and physiology of diving, and diving terminology. Additionally, the dive tables quiz will teach you how to properly plan dives using the dive tables from PADI, NAUI or SSI using both feet and meters. After the quiz you can review your answers in the Results section. Here you can read an explanation for the question that goes into more detail on the topic of the question, or mark questions that you would like to have appear in a future test. THEORY GUIDE The Theory Guide will teach you everything you need to know in order to take the Open Water Diver course exam. The theory guide contains chapters covering basic scuba diving tips, buoyancy, air pressure and gas laws, the scuba unit and how to assemble it, the buddy system and pre-dive safety check, dive tables and much more. Scuba Exam keeps track of where you were when you last stopped reading, so that you can always continue from where you left off. You can also create bookmarks and search for paragraphs covering a particular topic, and even search for a word or phrase within each chapter. FEEDBACK Please let us know if you are missing any features or content in Scuba Exam as we will continue to improve it. We always listen to our customers and we strive for perfection! DISCLAIMER This application is for educational purposes only. It is in no way intended as a substitute for a real diving course. Before attempting any form of scuba diving you must complete training with, and receive a valid certification from, a recognized scuba diving organization.

About

SonLerni

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
Read full description

Ready to take your fluency to the next level? SonLerni is for intermediate speakers (A2–B2) who have made some progress in learning a language but lose native speakers at full speed. Level up with native podcasts in English, French, German, Spanish and Hebrew, with synced transcripts, paced playback and phrase-by-phrase replay. TOTAL IMMERSION, NOT TEXTBOOK AUDIO Real conversations at natural speed, full of the slang, idioms and shortcuts textbooks skip. Podcasts let you eavesdrop on natives. SonLerni makes sure you catch what they say. AI TUTOR Lost? Tap the phrase. The AI tutor translates it literally, what the speaker actually means and the nuance: casual, regional or formal. Ask a follow-up, then another. The AI tutor loves rabbit holes. TOO FAST? SLOW IT DOWN • A transcript that follows the audio phrase by phrase • Replay by phrase, not by seconds • Fine-tune the playback speed FLASHCARDS BUILD THEMSELVES Every phrase you ask about becomes a flashcard, with the sentence you heard it in. A few minutes of review a day keeps it. PICK YOUR LEVEL Made for A2–B2. Set your level and get episodes that stretch you without losing you. FIVE LANGUAGES. ONE APP. English, French, German, Spanish and Hebrew. Switch languages any time. SEE YOUR PROGRESS Minutes listened, active days, flashcards and weekly goals, all on one screen. BUILT FOR INTERMEDIATE LEARNERS Outgrown beginner apps? Your next level is native podcasts, explained. SUBSCRIPTION SonLerni Premium is an auto-renewing annual subscription. Payment is charged when you confirm your purchase. The subscription renews automatically unless you turn it off at least 24 hours before the end of the current period. Manage or cancel it any time in your App Store account settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://sonlerni.com/privacy

Screenshots

Scuba Exam3 screens
SonLerni4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

Scuba Exam ships an update every 3 months, SonLerni weekly. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

Scorecard7 real differences · 3 level
Scuba Exam versus SonLerni: the parameters behind the verdict, then further details
ParameterScuba ExamSonLerni
Price$2.99Free — better
Rating4.8 (62 ratings)5.0 (10 ratings) — better
Positive reviews83.3% of reviews100.0% of reviews — better
Number of ratings62 — better10
Update frequencyEvery 3 monthsWeekly — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.3 — better17.0
Further details — not scored
Size100 MB81 MB
Age rating4+12+
DeveloperBoboshi ABSonlerni LLC

Customer experience

Scuba Exam

All ratings62 ratings
Positive95.2%
Neutral1.6%
Negative3.2%
Written reviews96 reviews
Positive83.3%
Neutral5.2%
Negative11.5%

SonLerni

All ratings10 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews8 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Scuba Exam

Reported bugs

19 issues
  • 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
Show 14 more
  • Crashes frequently at the end of quizzes
  • Metric conversion is often inaccurate
  • Crashes when you try to see your results
  • Crashes after doing a quiz, losing results
  • Mixes up answers and marks correct ones wrong
  • App crashes when choosing number of questions
  • Crashes consistently when opening 10 question quizzes
  • Occasionally marks for answers not chosen
  • Dive table examples in feet use meter numbers
  • Hand signal answers incorrect
  • Bug where summary page disappears after quiz
  • Questions need updating to current recommendations
  • Some answers incorrect based on latest PADI manual
  • Random quizzes and completed tests show up in history

Requested features

12 requests
  • 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
Show 7 more
  • A tab listing all test questions for study
  • More questions or reworded answers
  • More diversity in questions
  • Rescue diver stuff and more medical questions
  • Ability to forward or email quiz results
  • Summary of wrong answers to forward/email
  • Saved history of exams/quizzes for progress tracking

SonLerni

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Scuba Exam

No in-app purchases

1 purchases

SonLerni

Subscriptions1
  • Yearly Subscription7 Days trial2 variants$59.991 Year

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 October 30, 2026.

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