Comparison

SentenceDeck vs Shadowing

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

Head to head
About

SentenceDeck

Features
Read full description

Practice the conversations you will actually have. Pick a scene โ€” airport check-in, ordering coffee, a job interview โ€” 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 โ€” 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 โ€” recording stops when you stop speaking โ€” 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 (0.75ร— to 1.5ร—) 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 โ€” "Calling my landlord because the water heater is broken" โ€” 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 โ€ข Standard: free, with a number of free dialogues every day โ€ข 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 โ€” or import a text file โ€” 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 โ€ข 6,000 characters โ€ข 30,000 characters โ€ข 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

Shadowing

Features
Read full description

ShadowTeep helps you turn your own notes and phrases into repeatable listening and speaking practice. Write the sentence you want to own, hear it with on-device text-to-speech, and shadow it until it feels natural. Drill one line at a time, use Play All for a full note, favorite the phrases you need most, and keep practice material synced across iPhone, iPad, and Apple Watch. English and Chinese voice paths run on device after setup, so practice can continue offline once the required voice assets are ready. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

SentenceDeck4 screens
Shadowing4 screens

Verdict

The call

The clearest difference is in-app purchases: Shadowing at none against SentenceDeck's 3. Shadowing also leads on update cadence (every 5 days vs every 6 weeks). SentenceDeck's advantage is ads (none vs shown) and iOS requirement (17.0 vs 26.0). On price and device support there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. SentenceDeck sells 3 one-off in-app purchases. Shadowing asks for nothing beyond the download.

UpkeepUpdate frequency

SentenceDeck ships an update every 6 weeks, Shadowing every 5 days. The most recent releases landed on October 15, 2026 and October 4, 2026 respectively.

Scorecard4 real differences ยท 2 level
SentenceDeck versus Shadowing: the parameters behind the verdict, then further details
ParameterSentenceDeckShadowing
PriceFreeFree
Update frequencyEvery 6 weeksEvery 5 days โ€” better
AdsNo โ€” betterYes
In-app purchasesYesNo โ€” better
DevicesiPhone, iPadiPhone, iPad, Apple Watch โ€” better
Requires iOS17.0 โ€” better26.0
Further details โ€” not scored
Size36 MB16 MB
Age rating4+4+
Developerๅฅ‡ๆฟ‚ ไปปSungwook Baek

In-app purchases

3 purchases

SentenceDeck

One-time3
  • Credits 100$0.99
  • Credits 500$3.99
  • Credits 1200$7.99
None

Shadowing

No in-app purchases

Questions

Is SentenceDeck free?
SentenceDeck is free to download, with in-app purchases available.
Is Shadowing free?
Shadowing is free to download, with no in-app purchases.
Do SentenceDeck or Shadowing have ads?
Shadowing shows ads; SentenceDeck does not.
Which is updated more often, SentenceDeck or Shadowing?
SentenceDeck ships an update every 6 weeks, and Shadowing every 5 days. Most recently, SentenceDeck was updated on October 15, 2026 and Shadowing on October 4, 2026.

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