Comparison

SentenceDeck vs GuavaSpeak

Price, ratings, monetisation and update history for both apps, side by side — 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 — airport check-in, ordering coffee, a job interview — 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 — 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 — recording stops when you stop speaking — 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 (0.75× to 1.5×) 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 — "Calling my landlord because the water heater is broken" — 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 • Standard: free, with a number of free dialogues every day • 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 — or import a text file — 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 • 6,000 characters • 30,000 characters • 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

GuavaSpeak

Practice speaking English or Spanish with AI-powered tools. Focus on conversation, listening, pronunciation, vocabulary, and writing. Offers free basic tools and a premium subscription for advanced features like AI voice coaching and real-time feedback.

Highlights
  • Conversation practice
  • Listening comprehension
  • Pronunciation feedback
  • Vocabulary review
  • Writing coach
  • AI voice coaching
Features
Read full description

When you know the words but hesitate to speak, practice can help you take the next step. GuavaSpeak brings English and Spanish practice into short sessions you can fit into your day. Choose a language track and work with tools for listening, vocabulary, stories, verbs and speaking. PRACTICE FOR FREE Listening Lab: listen to sentences and check what you hear. Vocabulary: explore words by level, with translations and examples, then review them. Stories: read and listen to short dialogues with comprehension questions. Conjugation: practice verb forms in English or Spanish. These four tools are available without a Premium subscription. MORE WITH PREMIUM Voice Coach: practice a conversation with an AI coach. Pronunciation: say words and receive feedback on your practice. Writing Coach: write in your target language and review suggested corrections. English Premium and Spanish Premium are separate subscriptions. Subscribe to the language you choose; one subscription does not unlock both tracks. Available terms and any eligible trial are shown before purchase in the App Store. GuavaSpeak asks for microphone access when you use a speaking activity. It is a learning tool, not a guarantee of fluency or a substitute for a human teacher.

Screenshots

SentenceDeck4 screens
GuavaSpeak4 screens

Verdict

The call

The clearest difference is iOS requirement: GuavaSpeak at 15.0 against SentenceDeck's 17.0. On price, update cadence, ads and in-app purchases 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

Both are free to download. SentenceDeck sells 3 one-off in-app purchases and GuavaSpeak sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

SentenceDeck ships an update every 6 weeks, GuavaSpeak monthly. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

Scorecard1 real difference · 8 level
SentenceDeck versus GuavaSpeak: the parameters behind the verdict, then further details
ParameterSentenceDeckGuavaSpeak
PriceFreeFree
Rating—5.0 (2 ratings) — better
Number of ratings—2 — better
Update frequencyEvery 6 weeksMonthly — better
AdsNoNo
In-app purchasesYesYes
Monetization—Freemium
DevicesiPhone, iPadiPhone, iPod
Requires iOS17.015.0 — better
Further details — not scored
Size36 MB14 MB
Age rating4+4+
Developer奇濂 任E AI AGENT SYSTEMS LLC

In-app purchases

3 purchases

SentenceDeck

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

GuavaSpeak

Subscriptions2
  • GuavaSpeak English7 Days trial$9.991 Month
  • GuavaSpeak Spanish7 Days trial$9.991 Month

Questions

Is SentenceDeck free?
SentenceDeck is free to download, with in-app purchases available.
Is GuavaSpeak free?
GuavaSpeak is free to download, with in-app purchases available.
Do SentenceDeck or GuavaSpeak have ads?
Neither SentenceDeck nor GuavaSpeak shows ads.
Which is updated more often, SentenceDeck or GuavaSpeak?
SentenceDeck ships an update every 6 weeks, and GuavaSpeak monthly. Most recently, SentenceDeck was updated on October 28, 2026 and GuavaSpeak on October 31, 2026.

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