Comparison

Sentence Builder Master Pro vs Slow Fluent

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

Head to head
About

Sentence Builder Master Pro

Learn English grammar and vocabulary by unscrambling words to form correct sentences. This educational game offers multiple difficulty levels and a fun way to improve language skills for learners of all ages. Compete with others or play solo to master sentence structure and idioms.

Highlights
  • Word unscrambling for sentence formation
  • Multiple difficulty levels (Beginner to Expert)
  • Proverbs and Sayings level for idioms
  • Online multiplayer mode
  • Game Center integration
  • Time penalties for incorrect order
Features
Read full description

Play and learn English grammar, vocabulary and sentence structure by ordering the words to form correct sentences and sayings. Sentence Master is a fun and educational game for kids and English language students of all ages who want to learn and improve their language skills in a more entertaining way. How do you play? It’s easy. The game consists of putting the scrambled words from each level in order to form a correct sentence. (Beginner, skilled, professional, expert, sayings.) If you make a mistake and click the English Word in the incorrect order, there is a time penalty. Once you have completed the sentence you will receive a score based on how fast you were and your total number of errors. You can share your knowledge with other players worldwide thanks to online multiplayer mode or with your friends on Game Center. Are you an English student who wants to improve your skills? Sentence Master will help you organize the words in your sentences correctly. Are you an English expert who wants to show off your skills? Prove it in Competition mode on Game Center. Sentence Master is the first game of its kind designed and developed completely by educators to help students eliminate the most common mistake among English language learners, correct word order. With four levels from beginner to expert, Sentence Master is a challenge for everyone from the Beginner to the most seasoned English language communicators. The Proverbs and Sayings level is a great way to learn and remember popular English idioms and expressions. These are the levels: Beginner: Ideal for children. This level contains the easiest sentences with the fewest words to unscramble. Skilled: This is where things start to get harder. This level is great for adults who are beginning their English language learning adventure. Professional: Great for users with a solid base in English who want to keep their skills up to date. Expert: Only for those with the most proficient English skills. Are you one of them? Proverbs and Sayings: Every language has its idioms and expressions. Learning the refrains of the language of Shakespeare has never been so fun. Do you have what it takes to become the next Sentence Master? Try your luck in single player mode or against friends and other players worldwide. Learn English with a smile on your face.

About

Slow Fluent

Features
Read full description

Slow Fluent teaches you a new language in five focused minutes a day. Pick your language - Spanish, French, Italian, German, Portuguese, Japanese, Korean, Mandarin, Arabic, Hindi and twenty more - press play, and start answering. HOW A SESSION WORKS - Quick-fire rounds: see a picture or hear the word, then tap the right answer - Native-style audio on every word, so you learn the sound with the spelling - Wrong answers become learning moments: you see what you picked, what was correct, and the meaning - then the word comes back later in the session - Tricky words are flagged and repeat until you truly know them WHY IT STICKS - Spaced repetition brings each word back just before you would forget it - Words fade if you neglect them - Slow Fluent tells you exactly which ones to refresh - A daily streak and a five-minute goal make the habit effortless - Vocabulary is CEFR-graded, so you climb from A1 upward on real curriculum levels MORE THAN VOCABULARY Grammar, gender, connectors, collocations, false friends and common errors are woven into sessions as you progress - the details that make you sound natural, not just understood. 30 LANGUAGES AND COUNTING Spanish, French, Italian, Portuguese, Catalan, Romanian, German, Dutch, Swedish, Norwegian, Danish, Polish, Czech, Greek, Russian, Ukrainian, Turkish, Arabic, Hebrew, Hindi, Mandarin, Japanese, Korean, Vietnamese, Thai, Indonesian and more. Switch languages any time - your progress is kept per language. FREE, NO ADS Every language and every feature is free. No ads, no paywalls. An optional account (no email needed) syncs your streak and progress across devices. Five minutes. One streak. A language that finally sticks.

Screenshots

Sentence Builder Master Pro4 screens
Slow Fluent4 screens

Verdict

The call

The clearest difference is price: Sentence Builder Master Pro at Free against Slow Fluent's $4.99. Slow Fluent's advantage is update cadence (every 5 weeks vs every 3 months). On ads, in-app purchases, device support and iOS requirement 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

Sentence Builder Master Pro is free to download; Slow Fluent costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Sentence Builder Master Pro ships an update every 3 months, Slow Fluent every 5 weeks. Both last shipped on October 24, 2026.

Scorecard2 real differences · 8 level
Sentence Builder Master Pro versus Slow Fluent: the parameters behind the verdict, then further details
ParameterSentence Builder Master ProSlow Fluent
PriceFree — better$4.99
Rating4.6 (49 ratings) — better—
Positive reviews33.3% of reviews—
Number of ratings49 — better—
Update frequencyEvery 3 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.615.0 — better
Further details — not scored
Size46 MB2 MB
Age rating4+4+
DeveloperImanol Fernandez GorostizagaCharlie Sendrowski

In-app purchases

None

Sentence Builder Master Pro

No in-app purchases

None

Slow Fluent

No in-app purchases

Questions

Is Sentence Builder Master Pro free?
Sentence Builder Master Pro is free to download, with no in-app purchases.
Is Slow Fluent free?
Slow Fluent costs $4.99, with no in-app purchases.
Do Sentence Builder Master Pro or Slow Fluent have ads?
Neither Sentence Builder Master Pro nor Slow Fluent shows ads.
Which is updated more often, Sentence Builder Master Pro or Slow Fluent?
Sentence Builder Master Pro ships an update every 3 months, and Slow Fluent every 5 weeks. Most recently, Sentence Builder Master Pro was updated on October 24, 2026 and Slow Fluent on October 24, 2026.

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