Preposition Builder Master Pro vs Slow Fluent
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Preposition Builder Master Pro
Learn English prepositions and grammar by correctly placing words to form sentences and common sayings. This game offers multiple difficulty levels, from beginner to expert, and includes a fun way to master idioms and expressions. Compete with others or practice solo to improve your language skills.
- Sentence building with prepositions
- Multiple difficulty levels (Beginner to Expert)
- Proverbs and Sayings level
- Time penalties for errors
- Scoring based on speed and accuracy
- Online multiplayer mode
- Game Center integration
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Learn prepositions in English and grammar by putting the prepositions in place to form correct sentences and sayings. Preposition 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 prepositions from each level in the correct place to form a correct sentence. (Beginner, competent, professional, expert, sayings.) If you make a mistake and click the incorrect preposition, 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 expert who wants to show off your skills? Are you an English student who wants to improve your skills? Preposition Master will help you use prepositions in sentences correctly. Preposition Master is the first game of its kind designed and developed completely by educators to help students improve one of the biggest problems language learners all face, correct use of prepositions. With four levels from beginner to expert, Preposition 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 prepositions to work with. Competent: This is where things start to get harder. This level is great for learners who are a bit farther along in 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? Do you have what it takes to become the next Preposition Master? Try your luck in single player mode or against friends and other players worldwide. Learn English with a smile on your face.
Slow Fluent
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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
Verdict
The clearest difference is price: Preposition Builder Master Pro at Free against Slow Fluent's $4.99. On update cadence, ads, in-app purchases 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
Preposition 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.
Preposition Builder Master Pro ships an update every 2 months, Slow Fluent every 5 weeks. The most recent releases landed on October 9, 2026 and October 16, 2026 respectively.
| Parameter | Preposition Builder Master Pro | Slow Fluent |
|---|---|---|
| Price | Free — better | $4.99 |
| Rating | 3.8 (17 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 17 — better | — |
| Update frequency | Every 2 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 45 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Imanol Fernandez Gorostizaga | Charlie Sendrowski |
In-app purchases
Preposition Builder Master Pro
No in-app purchases
Slow Fluent
No in-app purchases
Questions
Is Preposition Builder Master Pro free?
Is Slow Fluent free?
Do Preposition Builder Master Pro or Slow Fluent have ads?
Which is updated more often, Preposition Builder Master Pro or Slow Fluent?
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