Sentence Builder Master Pro vs Reef AI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
Reef AI
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Reef is an on-device AI harness for iPhone and iPad. Connect a local or hosted model, add tools and files when you need them, and keep chats and data on your device. You choose the LLM and the credentials. Reef does not include a subscription or relay your traffic. MODELS OpenAI, Anthropic, Mistral, Groq, OpenRouter, Perplexity, and OpenAI-compatible servers—Ollama, LM Studio, vLLM, LocalAI, Jan, and others. Multiple profiles with per-discussion settings. API keys stored in the iOS keychain. TOOLS Four types, same thread: • Platform — calendar, contacts, photos, health, location, web, workspaces, memory banks, and more. Runs on your phone; you grant each permission. • Endpoint — HTTP APIs you define. • Lens — structured reasoning with on-device signed records. • Dynamic — tools the model can register during a session. FILES & MEMORY Thread-scoped workspaces for PDFs, code, images, and documents. Named memory banks across sessions. Knowledge graph with a 3D explorer, built offline from your content. VOICE & AGENTS Composer dictation and Talk mode (hands-free with native device voices; additional TTS providers coming). Switch models mid-thread, coordinate several agents with @mentions, or run parallel discussions. PLUGINS Install skills, tools, prompts, and presets from Git or an archive—without waiting for an app update. LOCAL-FIRST Chats, embeddings, workspace files, and settings stay on device. Direct connection to the endpoint you configure. Full export and import. Offline queue and background streaming. Sensitive capabilities require explicit OS permission.
Screenshots
Verdict
The clearest difference is update cadence: Reef AI at every 2 weeks against Sentence Builder Master Pro's every 3 months. On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Sentence Builder Master Pro ships an update every 3 months, Reef AI every 2 weeks. The most recent releases landed on September 8, 2026 and September 10, 2026 respectively.
| Parameter | Sentence Builder Master Pro | Reef AI |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (46 ratings) — better | — |
| Positive reviews | 33.3% of reviews | — |
| Number of ratings | 46 — better | — |
| Update frequency | Every 3 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 46 MB | 68 MB |
| Age rating | 4+ | 17+ |
| Developer | Imanol Fernandez Gorostizaga | Alexandru Ghinea |
In-app purchases
Sentence Builder Master Pro
No in-app purchases
Reef AI
No in-app purchases
Questions
Is Sentence Builder Master Pro free?
Is Reef AI free?
Do Sentence Builder Master Pro or Reef AI have ads?
Which is updated more often, Sentence Builder Master Pro or Reef AI?
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