Comparison

Preposition Builder Master Pro vs Triangle Sketch

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

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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.

About

Triangle Sketch

This geometry tool allows users to draw and manipulate triangles on a graph. It provides measurements, allows editing of sides and angles, and displays various triangle facts and properties. It's designed to help students visualize geometric concepts.

Highlights
  • Draw triangles on a graph
  • Edit side lengths and angles
  • View triangle measurements
  • Explore triangle properties
  • Use right-triangle trig tools
  • Customize display options
Features
Read full description

Triangle Sketch is a hands-on geometry tool for drawing and exploring triangles. Draw a triangle with your finger, check its measurements, edit side lengths and angles, move vertices, enter coordinates, and view useful triangle facts. Triangle Sketch helps students see how triangle measurements connect instead of only reading formulas. Features: • Draw triangles directly on a graph • Edit side lengths, angles, and vertex coordinates • Work with any triangles and right triangles • View area, perimeter, triangle type, height, centroid, incircle, and circumcircle • Use right-triangle trig tools • Change units, decimals, colors, grid snapping, and display options • One-time hints help students discover important tools Triangle Sketch is designed for students, teachers, and anyone learning geometry.

Screenshots

Preposition Builder Master Pro4 screens
Triangle Sketch4 screens

Verdict

The call

The clearest difference is price: Preposition Builder Master Pro at Free against Triangle Sketch's $0.99. Preposition Builder Master Pro also leads on ratings volume (17 vs 1) and iOS requirement (15.6 vs 17.6). Triangle Sketch's advantage is rating (5.0 vs 3.8). On update cadence, ads, in-app purchases and monetization model 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

Preposition Builder Master Pro is free to download; Triangle Sketch costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Triangle Sketch holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: Preposition Builder Master Pro has 17 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Preposition Builder Master Pro ships an update every 2 months, Triangle Sketch monthly. The most recent releases landed on October 9, 2026 and October 2, 2026 respectively.

Scorecard4 real differences · 6 level
Preposition Builder Master Pro versus Triangle Sketch: the parameters behind the verdict, then further details
ParameterPreposition Builder Master ProTriangle Sketch
PriceFree — better$0.99
Rating3.8 (17 ratings)5.0 (1 ratings) — better
Positive reviews0.0% of reviews—
Number of ratings17 — better1
Update frequencyEvery 2 monthsMonthly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better17.6
Further details — not scored
Size45 MB5 MB
Age rating4+4+
DeveloperImanol Fernandez GorostizagaEduardo Longoria Alaniz

Customer experience

Preposition Builder Master Pro

All ratings17 ratings
Positive64.7%
Neutral5.9%
Negative29.4%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Triangle Sketch

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Preposition Builder Master Pro

No in-app purchases

None

Triangle Sketch

No in-app purchases

Questions

Is Preposition Builder Master Pro free?
Preposition Builder Master Pro is free to download, with no in-app purchases.
Is Triangle Sketch free?
Triangle Sketch costs $0.99, with no in-app purchases.
Which has better reviews, Preposition Builder Master Pro or Triangle Sketch?
Triangle Sketch is rated higher. Preposition Builder Master Pro averages 3.8 out of 5 from 17 ratings, while Triangle Sketch averages 5.0 from 1 ratings.
Do Preposition Builder Master Pro or Triangle Sketch have ads?
Neither Preposition Builder Master Pro nor Triangle Sketch shows ads.
Which is updated more often, Preposition Builder Master Pro or Triangle Sketch?
Preposition Builder Master Pro ships an update every 2 months, and Triangle Sketch monthly. Most recently, Preposition Builder Master Pro was updated on October 9, 2026 and Triangle Sketch on October 2, 2026.

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