Comparison

Sentence Builder Master Pro vs ReadFlow

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

ReadFlow

Features
Read full description

Read faster, and prove you understood it. ReadFlow is an RSVP speed reader built around a daily challenge. Words appear one at a time in a single spot, so your eyes stop jumping across the line. After every read comes a short comprehension quiz, because speed only counts if you score. THE DAILY Everyone gets the same passage each day. Read it at speed, take the quiz, and see where you placed against everyone who played. It takes about two minutes. Share your score card and keep your streak going. READ YOUR OWN BOOKS AND DOCUMENTS Import PDFs and DRM-free EPUBs, paste any article, or share a web page straight from Safari. Long documents are split into short chapters with a time estimate for each. ReadFlow saves your place and picks up at the start of your last sentence, so you can finish a book a few minutes at a time. THE GAUNTLET Escalating rounds from 300 to 900 words per minute. Pass the comprehension check to reach the next round. See how far your reading holds up. BUILT FOR FOCUS • RSVP reader with adjustable speed and optimal recognition point highlighting • Comprehension quiz after every session, scored on speed and accuracy • Library of passages by topic and difficulty, with new ones added regularly • Streaks, XP, and personal bests • Dyslexia-friendly font, plus dark, light, sepia, and high-contrast themes • Works on iPhone and iPad READFLOW PREMIUM Unlimited sessions, daily challenge replays, streak saves and premium themes. Choose a monthly or yearly subscription with a 7-day free trial on yearly, or pay once for lifetime access. Privacy policy: https://policyforge.co/policy/privacy-readflow Terms of use: https://policyforge.co/policy/terms-readflow

Screenshots

Sentence Builder Master Pro4 screens
ReadFlow4 screens

Verdict

The call

The clearest difference is in-app purchases: Sentence Builder Master Pro at none against ReadFlow's 2. Sentence Builder Master Pro also leads on iOS requirement (15.6 vs 17.0). ReadFlow's advantage is update cadence (every 2 months vs every 3 months). On price, ads 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. ReadFlow sells 2 in-app purchases, starting at $5.99 per month. Sentence Builder Master Pro asks for nothing beyond the download.

UpkeepUpdate frequency

Sentence Builder Master Pro ships an update every 3 months, ReadFlow every 2 months. The most recent releases landed on October 10, 2026 and October 3, 2026 respectively.

Scorecard3 real differences · 7 level
Sentence Builder Master Pro versus ReadFlow: the parameters behind the verdict, then further details
ParameterSentence Builder Master ProReadFlow
PriceFreeFree
Rating4.6 (46 ratings) — better—
Positive reviews33.3% of reviews—
Number of ratings46 — better—
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better17.0
Further details — not scored
Size46 MB33 MB
Age rating4+4+
DeveloperImanol Fernandez GorostizagaPaul Ekirapa

In-app purchases

None

Sentence Builder Master Pro

No in-app purchases

2 purchases

ReadFlow

Subscriptions2
  • Premium Monthly7 Days trial$5.991 Month
  • Premium Yearly7 Days trial$34.991 Year

Questions

Is Sentence Builder Master Pro free?
Sentence Builder Master Pro is free to download, with no in-app purchases.
Is ReadFlow free?
ReadFlow is free to download, with in-app purchases available.
Do Sentence Builder Master Pro or ReadFlow have ads?
Neither Sentence Builder Master Pro nor ReadFlow shows ads.
Which is updated more often, Sentence Builder Master Pro or ReadFlow?
Sentence Builder Master Pro ships an update every 3 months, and ReadFlow every 2 months. Most recently, Sentence Builder Master Pro was updated on October 10, 2026 and ReadFlow on October 3, 2026.

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