App Overview

SenGram - Sentence Diagramming icon

SenGram - Sentence Diagramming

Soferio · Education

English grammar game app / Available on the iPhone and iPad

$3.99 · In-app purchases

PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
3.6
179 ratings · Top 50%

Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.

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What's included14 files

A product spec, phased build plan, differentiation notes, and screen references.

  • START_HERE
  • AGENTS
  • EVIDENCE
  • SPEC
  • BUILD_PLAN
  • DIFFERENTIATION
  • skills/
  • screens/
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Feature spec

Goal: Send a clear invoice after finishing a job.

  • Add a client, line items, a due date, and payment instructions.
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  • Keep an editable draft if export fails.

Screen plan

Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.

States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.

Differentiate and validate

Hypothesis: Contractors need faster repeat invoices more than more templates.

First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.

The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.

Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.

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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
Rork plan preview for SenGram - Sentence Diagramming: map the core Education workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
            

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Opportunities

AI-GENERATED OPPORTUNITY HYPOTHESES

These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.

Hypothesis 1

Implement a community-driven feature to add and share examples

Assumption to check: Limited sentence examples for practice

Validate with people who use this workflow before building.

Hypothesis 2

Enhance tooltips and tutorials for better guidance

Assumption to check: In-app diagramming tools can be confusing

Validate with people who use this workflow before building.

Hypothesis 3

Introduce user progress metrics for engagement

Assumption to check: Lack of progress tracking

Validate with people who use this workflow before building.

Hypothesis 4

Offer more compelling premium features to enhance value

Assumption to check: Subscription not clearly justified

Validate with people who use this workflow before building.

App evidence

Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.

App Store 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 your homework for you...). 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. --------------------------- Some reviews (US region): Great App by Beezer88 - Version 1.00 - Aug 11, 2012. This is great for teaching how to diagram a sentence. Keep developing!!! :) Spectacular! by Viskid - Version 1.00 - Aug 11, 2012 This application has been used to great effect in my classroom. Used as part of the daily warmup, my kids are becoming so efficient at this oft forgotten skill. 5 stars and a hip-hip-hooray for this app. Worthwhile by GhostGame123 - Version 1.00 - Aug 9, 2012. I teach Latin and a major difficulty is getting the students to see the structure of sentences. The problem, at least in part, is that they don't (or can't) see structure even in English--no one teaches diagramming any more. I'm going to try to incorporate this into this year's classes. Thanks; I'd certainly buy more elaborate versions or buy upgrades in app. Love it! by Louwege - Version 1.00 - Jul 19, 2012 Please continue to develop. Great aid to learning. Thank you. -------------------- 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. In addition, there are further puzzles for purchase within the app in the 'SenGram Store'. 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!

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Screenshots

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Build scope

Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.

Define the first version

Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.

Set boundaries

Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.

Check the hard parts

Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.

SUGGESTED BUILD STACK
React Native
Expo
Zustand
Supabase
React Navigation
TypeScript
BUILD KIT DIFFICULTY
Intermediate

From the Build Kit assessment.

A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.