Comparison

SenGram vs Number Builder

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

Head to head
About

SenGram

This educational game challenges users to deconstruct sentences and visually represent their grammatical structure through diagramming. It offers over 100 puzzles, with additional content available for purchase, to test and enhance language comprehension.

Highlights
  • Sentence diagram puzzles
  • Grammatical structure identification
  • Over 100 pre-made puzzles
  • Reed Kellogg diagramming style
  • In-app puzzle purchases
Features
Read full description

English grammar game app / Available on the iPhone and iPad SenGram is an iPhone and iPad language game which presents pre-prepared sentence diagram puzzles and solutions to those puzzles, for players to solve. (Please note: this is an educational sentence-diagramming puzzle game, it is not a tool which will solve pre-existing puzzles). This puzzle game tests and improves your ability to take sentences apart, identify the underlying grammatical structure, and reflect that structure on a diagram. This game will be of interest to students of language (including ESL students), lovers of language and grammar, those sitting standardised tests with a grammar component (e.g. SAT, GMAT, NAPLAN) as well as those who are familiar with sentence diagrams and enjoy completing them as puzzles. The game might be especially useful to those students who are are currently studying a course in which sentence diagramming is used as a teaching tool. Your objective when playing the game will be to place each word in the 'puzzle sentence' in its correct place on the 'sentence diagram'. At present the app includes over 100 sentence puzzles, including: (1) Subject and verb: 20 sentences. (2) Article, adjective, adverb, possessive: 21 sentences. (3) Prepositional phrase, adverbial noun: 20 sentences. (4) Object - direct, indirect: 20 sentences. (5) Linking verb: 20 sentences. (6) Co-ordinating conjunction: 12 sentences. (7) Challenge puzzles: 10 sentences. The style of diagram adopted in this app is known as the 'Reed Kellogg' style, and there are many websites and books devoted to it. In our view this style of diagramming offers one of the more enjoyable ways to test and improve your knowledge of grammar, especially if you have a visual mind. Best of luck! We hope you enjoy the puzzles!

About

Number Builder

This app helps solve math puzzles by calculating all possible equations from dice rolls and a target number. It supports basic arithmetic, powers, and roots, making it a useful tool for games like Number Knockout.

Highlights
  • Calculates all possible solutions
  • Supports basic arithmetic
  • Includes powers and roots
  • Input dice rolls and target number
  • Useful for Number Knockout game
Features
Read full description

Number Builder turns dice rolls into a hands-on way to practice mental math. SOLVE MODE Roll three dice, enter a target number, and see every way to combine your dice — using addition, subtraction, multiplication, division, exponents, and roots — to reach it. Great for checking your own work or discovering paths you hadn't thought of. CHALLENGE MODE Roll a set of dice and a target, then build the answer yourself — tapping dice and operators into place, left to right, with instant feedback when you're right. Six levels of difficulty take you from simple addition all the way up to exponents, fractional exponents, and roots, with targets up to 1,000. Challenge mode includes 3 free puzzles to try. After that, it unlocks with a single one-time purchase — no subscriptions, and Family Sharing means one purchase covers your whole family. BUILT FOR PRACTICE Six progressively harder levels, each changing exactly one thing about the challenge Customizable dice colors and styles Full support for larger text sizes and VoiceOver Solve mode stays completely free, no purchase required No data is collected. No ads, ever.

Screenshots

SenGram4 screens
Number Builder4 screens

Verdict

The call

The clearest difference is price: Number Builder at Free against SenGram's $3.99. Number Builder also leads on rating (4.6 vs 3.6) and review sentiment (80% vs 64%). SenGram's advantage is update cadence (monthly vs every 39 months) and ratings volume (181 vs 10). On ads, in-app purchases, device support and iOS requirement 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

Number Builder is free to download; SenGram costs $3.99 up front. SenGram sells 1 one-off in-app purchase and Number Builder sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Number Builder holds the better App Store score, 4.6 against 3.6. That said, the two scores are not equally well evidenced: SenGram has 181 ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 64% of SenGram's written reviews are positive against 80% of Number Builder's.

UpkeepUpdate frequency

SenGram ships an update monthly, Number Builder every 39 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

Scorecard6 real differences · 4 level
SenGram versus Number Builder: the parameters behind the verdict, then further details
ParameterSenGramNumber Builder
Price$3.99Free — better
Rating3.6 (181 ratings)4.6 (10 ratings) — better
Positive reviews63.6% of reviews80.0% of reviews — better
Number of ratings181 — better10
Update frequencyMonthly — betterEvery 39 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size11 MB4 MB
Age rating4+4+
DeveloperSoferioWidgetilities LLC

Customer experience

SenGram

All ratings180 ratings
Positive66.1%
Neutral5.0%
Negative28.9%
Written reviews66 reviews
Positive63.6%
Neutral6.1%
Negative30.3%

Number Builder

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive80.0%
Neutral20.0%
Negative0.0%

Bugs and requests

SenGram

Reported bugs

4 issues
  • App crashes on launch after iPhone update
  • App crashes when trying to use it
  • App no longer works after iPhone update
  • Screen only shows a vertical line on iPad

Requested features

12 requests
  • Supplementary exercises or commentary
  • Draw lines and place words freely
  • Add more sentences to diagram
  • Input own sentences to diagram
  • Pop-ups explaining 'why' for diagramming
Show 7 more
  • More interactive diagramming (user draws lines)
  • Dark mode option
  • Non-skeuomorphic design with modern iOS style
  • More regular updates to the store
  • Add a celebration or points system for gamification
  • Show part of speech for each sentence
  • Expand grammar construct examples

Number Builder

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

SenGram

One-time1
  • Level 3 - verbals.$2.99
1 purchases

Number Builder

One-time1
  • Unlock Challenge Mode$1.99

Questions

Is SenGram free?
SenGram costs $3.99, and also offers in-app purchases.
Is Number Builder free?
Number Builder is free to download, with in-app purchases available.
Which has better reviews, SenGram or Number Builder?
Number Builder is rated higher. SenGram averages 3.6 out of 5 from 181 ratings, while Number Builder averages 4.6 from 10 ratings.
Do SenGram or Number Builder have ads?
Neither SenGram nor Number Builder shows ads.
Which is updated more often, SenGram or Number Builder?
SenGram ships an update monthly, and Number Builder every 39 months. Most recently, SenGram was updated on November 1, 2026 and Number Builder on November 3, 2026.

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