Comparison

SentenceDeck vs Hangul Sound Lab

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

Head to head
About

SentenceDeck

Features
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Practice the conversations you will actually have. Pick a scene β€” airport check-in, ordering coffee, a job interview β€” and SentenceDeck uses AI to write a short dialogue for your level. You say your lines; your partner's lines are played for you. It is shadowing, made real: hear each line, say it, then hear yourself back. No grades, no corrections, no leaderboards β€” just a calm, repeatable way to rehearse real situations out loud, in a hand-drawn sketchbook. HOW A SCENE WORKS 1. Choose from 30 everyday scenes in five categories: Travel, Daily Life, Work, Social and Emergencies 2. Pick your level (A2, B1 or B2) and a voice for each side of the dialogue 3. Practice line by line: listen to the reference, speak β€” recording stops when you stop speaking β€” then play yourself back. Play your own lines, swap to the other role, or practice both sides 4. Finish with a short recap: lines practiced, time spent and the lines you recorded again Line-by-line translations in your interface language are one tap away. A/B compare, sentence lock and playback speed (0.75Γ— to 1.5Γ—) are all there while you practice. A STAMP FOR EVERY SCENE Finish a scene and it is stamped into your passport, next to today's lines, your day streak and your total. My Scenes keeps every dialogue you have practiced, with all its versions, ready to search and practice again. DESCRIBE YOUR OWN SCENE Type a situation in one sentence β€” "Calling my landlord because the water heater is broken" β€” and get a dialogue written for it. Your description is sent to an AI service to write the dialogue, and the app asks for your permission before the first time. Everyday situations only; please leave out names and contact details. Any AI-written dialogue can be reported from the practice screen or the recap. READY OFFLINE 21 built-in English scenes (B1) come with audio, are free to practice and work without a connection, so you can start talking the moment you open the app. TWO WAYS TO WRITE A DIALOGUE β€’ Standard: free, with a number of free dialogues every day β€’ Detailed: richer context and more natural lines. Uses characters from your balance; the cost is shown before you start, and nothing is charged if writing fails TWO KINDS OF VOICE System voice: built into iOS. Free, offline, unlimited. Premium voice: natural, lifelike voices that speak each line with the mood of the scene. Premium audio is generated sentence by sentence as you practice and paid for in characters. The same sentence is cached for replay with the same voice settings; changing the voice may generate it again and use characters again. READ ALONG WITH YOUR OWN TEXT Paste an article, a script or presentation notes β€” or import a text file β€” and practice it sentence by sentence. Backup & Restore keeps the audio you generated. LANGUAGES Practice English, Chinese (Simplified and Traditional), Japanese, Korean, Spanish, French, Italian or German. The app itself speaks 10 interface languages, on iPhone and iPad, in light or dark mode. CHARACTER PACKS β€’ 6,000 characters β€’ 30,000 characters β€’ 72,000 characters Characters never expire and are used for premium voice and Detailed dialogues. The App Store shows the local price for your region. Whether you are getting ready for a trip, a job interview, IELTS or TOEFL, or simply want to sound natural in everyday conversations, SentenceDeck gives you a focused speaking routine for the situations that matter to you. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.kuroneko-cmd.dev/privacy/sentencedeck/

About

Hangul Sound Lab

Features
Read full description

Hangul Sound Lab helps you understand Hangul structure and Korean sound changes through hands-on building and listening. BUILD HANGUL Choose an initial, medial, and optional final consonant (batchim). The syllable is composed instantly using the official Unicode Hangul formula. COMPARE SPELLING AND SOUND See examples such as κ΅­λ¬Ό β†’ ꢁ물 and 같이 β†’ κ°€μΉ˜. Tap each card to hear Korean speech. FIVE SOUND-CHANGE TYPES Learn nasalization, liquid assimilation, aspiration, palatalization, and tensification with words, realized sounds, meanings, and audio. LEARNING RECORD Completed Hangul builds are stored on your device. STRUCTURED COURSE Study 500 original questions across 100 levels, with listening, pronunciation, review, history, statistics, achievements, ranking, and multiple learner profiles. The interface supports Japanese, English, Simplified Chinese, Korean, Spanish, French, and German. Terms of Use https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy https://hashisoft.jp/koreanland/privacy/

Screenshots

SentenceDeck4 screens
Hangul Sound Lab4 screens

Verdict

The call

The clearest difference is ads: SentenceDeck at none against Hangul Sound Lab's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. SentenceDeck sells 3 one-off in-app purchases and Hangul Sound Lab sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

SentenceDeck ships an update every 6 weeks, Hangul Sound Lab every 2 months. The most recent releases landed on October 15, 2026 and October 25, 2026 respectively.

Scorecard1 real difference Β· 5 level
SentenceDeck versus Hangul Sound Lab: the parameters behind the verdict, then further details
ParameterSentenceDeckHangul Sound Lab
PriceFreeFree
Update frequencyEvery 6 weeks β€” betterEvery 2 months
AdsNo β€” betterYes
In-app purchasesYesYes
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.017.0
Further details β€” not scored
Size36 MB10 MB
Age rating4+4+
Developerε₯‡ζΏ‚ δ»»hashisoft

In-app purchases

3 purchases

SentenceDeck

One-time3
  • Credits 100$0.99
  • Credits 500$3.99
  • Credits 1200$7.99
1 purchases

Hangul Sound Lab

One-time1
  • Remove Ads$2.99

Questions

Is SentenceDeck free?
SentenceDeck is free to download, with in-app purchases available.
Is Hangul Sound Lab free?
Hangul Sound Lab is free to download, with in-app purchases available.
Do SentenceDeck or Hangul Sound Lab have ads?
Hangul Sound Lab shows ads; SentenceDeck does not.
Which is updated more often, SentenceDeck or Hangul Sound Lab?
SentenceDeck ships an update every 6 weeks, and Hangul Sound Lab every 2 months. Most recently, SentenceDeck was updated on October 15, 2026 and Hangul Sound Lab on October 25, 2026.

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