Feature spec
Goal: Send a clear invoice after finishing a job.
- Add a client, line items, a due date, and payment instructions.
- Preview the total before exporting a PDF.
- Keep an editable draft if export fails.
The must-have companion for your TI-84 Plus CE graphing calculator:
$7.99 · In-app purchases
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.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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 plan preview for TI-84 CE Calculator Manual: map the core Books workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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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
Assumption to check: Limited content depth and interactivity
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Cluttered interface with too much text
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Inconsistent updates and support
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Poor search functionality
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
The must-have companion for your TI-84 Plus CE graphing calculator: • This manual shows all the important functions of the TI-84 Plus CE graphing calculator you need to know for high school or college. It comes with step-by-step key press sequences and some insider tips about your calculator. In total it covers 65 topics that will transform you into a TI-84 master. • The following chapters are available: First Steps, Graphing Basics, Differential Calculus, Solve Equations, Integral Calculus, Matrices, Statistics & Probability and The Apps Menu. • You can swipe through screenshots of the original graphing calculator that show every step you need to take (over 300 screenshots in total), watch animated key press sequences, or open video tutorials to see how it works on the TI-84 Plus CE! • 60 math problems with solutions and a quiz to practice your skills! • Ideal for exam preparation since you often won't remember all the calculator's commands after several months. It covers all you need to know for the SAT, ACT, and AP exams. • The app contains the following topics: FIRST STEPS • The Basics of the Basics • Mode Settings • Basic Arithmetic • Storing Variables • Working with Fractions • Testing Numbers • Converting Angles & DMS • Your Calculator on the SAT, ACT & AP Exams • Common Error Messages • Complex Numbers GRAPHING BASICS • Enter Functions • Enter Families of Functions • Formatting the Graph • Setting the Graph Window • Zooming the Graph Window • Using the Table • Parametric, Polar & Sequence Graphing DIFFERENTIAL CALCULUS • Tracing a Graph • Find Y-Value • Find X-Value • Y-Intercept • Zeros of a Function • Minimum • Maximum • Intersection of two Functions • Draw Derivative • Inflection Points • Calculate Tangent SOLVE EQUATIONS • Polynomial • Solve any Equation • Equation Solver INTEGRAL CALCULUS • Calculate Integral • Integral in GRAPH Menu • Find Area with Absolute Value • Area between two Functions • Integral Function MATRICES • Save Matrix • Delete Matrix • Put into Row-Echelon Form • Solve Matrix • Transpose of a Matrix • Identity Matrix • Inversion of a Matrix • Determinant of a Matrix • Matrix Arithmetic Operations STATISTICS & PROBABILITY • Permutations, Combinations & Factorials • Random Numbers • Lists & Statistical Data • Histogram, Box Plot & Scatter Plot • Statistical Data Analysis • Regression • Probability Distributions • TESTS Menu: Hypothesis Tests & Confidence Intervals THE APPS MENU • Finance (TVM Solver) • CabriJr (Interactive Geometry) • Conics (Conic Graphing) • Inequalz (Inequality Graphing) • Periodic (Periodic Table) • PlySmlt2 (Root Finder & Simultaneous Equation Solver) • Prob Sim (Probability Simulation) • Python (CE Python Models) • SciTools (Science Tools) • Transfrm (Transformation Graphing) • The Rest of the Menu • Sharing Files: the LINK Menu MATH PROBLEMS & QUIZ • Practice with 60 math problems with solutions and test yourself with the built-in quiz. We also have manual apps for the TI-84 Plus, TI-Nspire CX (and CAS), and CASIO fx-9860GII. And if you are looking for the calculator itself, check out our graphing calculator app Taculator 84. NO ACTUAL GRAPHING CALCULATOR INCLUDED. THE APP IS A MANUAL! TI-84 Plus and TI-84 Plus CE are trademarks of Texas Instruments Incorporated. This app is an independently developed manual and is not affiliated with, sponsored by, or endorsed by Texas Instruments.
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Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.