SenGram vs Number Builder
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Sentence diagram puzzles
- Grammatical structure identification
- Over 100 pre-made puzzles
- Reed Kellogg diagramming style
- In-app puzzle purchases
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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!
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.
- Calculates all possible solutions
- Supports basic arithmetic
- Includes powers and roots
- Input dice rolls and target number
- Useful for Number Knockout game
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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
Verdict
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
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.
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.
SenGram ships an update monthly, Number Builder every 39 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.
| Parameter | SenGram | Number Builder |
|---|---|---|
| Price | $3.99 | Free — better |
| Rating | 3.6 (181 ratings) | 4.6 (10 ratings) — better |
| Positive reviews | 63.6% of reviews | 80.0% of reviews — better |
| Number of ratings | 181 — better | 10 |
| Update frequency | Monthly — better | Every 39 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 11 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Soferio | Widgetilities LLC |
Customer experience
SenGram
Number Builder
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
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- 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
SenGram
- Level 3 - verbals.$2.99
Number Builder
- Unlock Challenge Mode$1.99
Questions
Is SenGram free?
Is Number Builder free?
Which has better reviews, SenGram or Number Builder?
Do SenGram or Number Builder have ads?
Which is updated more often, SenGram or Number Builder?
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