Comparison

Sentence Builder Master Pro vs Stargazer

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

Stargazer

Explore the night sky by pointing your device upwards. Identify planets, constellations, stars, and satellites. Features an AI assistant for astronomy questions and an augmented reality mode to visualize celestial bodies.

Highlights
  • Point-and-identify celestial objects
  • AI-powered astronomy assistant
  • Augmented reality solar system exploration
  • Constellation artwork and facts
  • Night photography planning
  • Printable star charts
  • Interactive sky quiz
Features
Read full description

Point your phone at the sky, tap a star or planet, and explore what you are looking at. Stargazer brings a live sky map, observing tools and astronomy guides together in one app. TWIN SKY: NOW BESIDE LATER See two calculated skies for the same observing location, from 15 minutes to eight hours apart. Link direction and zoom for comparison, or explore each view independently. Weather, darkness and your horizon affect actual visibility. GUIDED OBSERVING SESSIONS Work through your saved targets with the sky visible. The guide prioritises targets becoming low sooner. Aim, skip or explicitly mark a target observed; aiming alone never logs an observation. NIGHTSTAND A large dimmable bedside clock over a quietly changing real-time sky. Landscape is the default: prop Duo with its hinge at the top, with clock and weather over the sky on the facing display. See Moon phase and available weather, switch to red night vision, and choose whether to keep the screen awake. The clock uses your device’s time zone. Weather needs an internet connection and includes its update time. AN OBSERVING DESK BESIDE YOUR SKY On iPhone Duo, iPad and other roomy windows, keep the sky visible beside your observing workspace. Browse targets, check their altitude and find them in the sky without covering the view. A compact observing desk is also available on ordinary iPhones. COMPARE TWO TARGETS Compare the altitude of two objects across the night, preview the sky at a chosen time and jump to each target’s highest point within the charted window. Charts use your device’s local time. Actual visibility also depends on weather, darkness and your horizon. PLAN YOUR NIGHT Keep a saved target checklist, mark what you have observed and write field notes about your equipment, conditions and discoveries. Plans and notes are saved locally on your device. A TABLETOP OBSERVATORY Use separate sky and control panes in tabletop mode. Native Duo fold handling follows the available window and reserved fold region, while your target and observing plan stay together as the layout changes. POINT, SEARCH AND EXPLORE Explore planets, the Moon, stars, constellations, deep-sky objects and satellites. Search by name, tap an object for details, save favourites or use guidance to locate it. Constellation artwork and adjustable sky layers help you read the sky. EXPLORE IN 3D AND AR Explore the solar system, planets and moons in 3D. Supported iPhones and iPads also offer AR views. Discover lunar features and landing sites, and see how Moon phases work. NOVA YOUR ASTRONOMY GUIDE Ask about objects and astronomy. Compatible devices use Apple’s on-device models when available; built-in local answers remain available otherwise. A kids mode uses simpler explanations. MORE FOR YOUR NEXT NIGHT OUT • Tonight’s overview, meteor showers and satellite passes • Time travel through the sky • Night photography planning • Stargazing conditions and dark-sky tools • Printable star charts and shareable cards • A sky quiz and astronomy facts • Red night-vision mode • Home-screen widgets No account is required. Location helps calculate your sky. Optional weather, maps and online imagery use their respective services; attribution and data information are available in the app.

Screenshots

Sentence Builder Master Pro4 screens
Stargazer4 screens

Verdict

The call

The clearest difference is review sentiment: Stargazer at 100% against Sentence Builder Master Pro's 33%. Stargazer also leads on monetization model (free vs paid) and update cadence (weekly vs every 3 months). Sentence Builder Master Pro's advantage is rating (4.6 vs 3.0) and ratings volume (49 vs 2). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Sentence Builder Master Pro holds the better App Store score, 4.6 against 3.0. That said, the two scores are not equally well evidenced: Sentence Builder Master Pro has 49 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 33% of Sentence Builder Master Pro's written reviews are positive against 100% of Stargazer's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Sentence Builder Master Pro ships an update every 3 months, Stargazer weekly. The most recent releases landed on November 2, 2026 and November 6, 2026 respectively.

Scorecard6 real differences · 4 level
Sentence Builder Master Pro versus Stargazer: the parameters behind the verdict, then further details
ParameterSentence Builder Master ProStargazer
PriceFreeFree
Rating4.6 (49 ratings) — better3.0 (2 ratings)
Positive reviews33.3% of reviews100.0% of reviews — better
Number of ratings49 — better2
Update frequencyEvery 3 monthsWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS15.6 — better26.0
Further details — not scored
Size46 MB55 MB
Age rating4+4+
DeveloperImanol Fernandez GorostizagaKendal Slack

Customer experience

Sentence Builder Master Pro

All ratings46 ratings
Positive91.3%
Neutral4.3%
Negative4.3%
Written reviews6 reviews
Positive33.3%
Neutral33.3%
Negative33.3%

Stargazer

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Sentence Builder Master Pro

No in-app purchases

None

Stargazer

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 Stargazer free?
Stargazer is free to download, with no in-app purchases.
Which has better reviews, Sentence Builder Master Pro or Stargazer?
Sentence Builder Master Pro is rated higher. Sentence Builder Master Pro averages 4.6 out of 5 from 49 ratings, while Stargazer averages 3.0 from 2 ratings.
Do Sentence Builder Master Pro or Stargazer have ads?
Neither Sentence Builder Master Pro nor Stargazer shows ads.
Which is updated more often, Sentence Builder Master Pro or Stargazer?
Sentence Builder Master Pro ships an update every 3 months, and Stargazer weekly. Most recently, Sentence Builder Master Pro was updated on November 2, 2026 and Stargazer on November 6, 2026.

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