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.
iExcel is a fully offline Excel learning app
$0.99
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.
Your first Build Kit is free with a verified email.
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.
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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.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
iExcel is a fully offline Excel learning app. Look up functions, study tips, follow courses, take quizzes, and browse keyboard shortcuts. Everything is built in. No account. No internet required. Learn on your commute, while traveling, or between meetings without sign-in delays. iExcel combines a function reference, practical tips, quizzes, and a formula Playground in one app for structured, efficient learning. Ideal for office workers, finance teams, analysts, and anyone who wants Excel knowledge at hand. 1. What you get • 265 Excel functions with syntax, parameters, examples, notes, and related functions across major categories • 71 practical tips with step-by-step guidance for everyday office work • 44 learning-path lessons from basics to common workflows • 22 practice quizzes with explanations, best scores, wrong-answer review, and focused retry mode • 114 Mac and Windows shortcut references shown side by side • 500+ learning items in Simplified Chinese, Traditional Chinese, and English 2. A clear learning path • Home progress ring, streak days, and new Learning Stats dashboard with category mastery and quiz scores • Continue Learning, Daily Function, daily goal, and optional reminder help you stay consistent • Manual mastery marks with toggle; Recents and Favorites with filters, layouts, and multi-select • Customize up to 4 Home shortcuts synced via iCloud: Playground, Quiz, Daily Function, Search, Stats, Favorites • Browse by category with list, grid, or card layout; sort by order, name, or progress; mark all as learned • Category and Favorites tabs can be toggled; deep links and Home grid keep content reachable 3. Practice and review • 3D quiz cards with explanations; 50% or higher marks mastery; wrong answers saved for focused retry • Editable Formula Playground with 15+ functions, cell references, and basic arithmetic • One-tap try from function details; saved formula and table state • Search with type and not-yet-learned filters; recent searches saved; difficulty and version labels • Detail learn bar, Continue Learning, long-press to favorite, mark, copy, or share 4. Search and discovery • Full-text search across all content types; native Search tab on iOS 18+, sidebar on Mac • Filter by type or not-yet-learned; grouped results; recent searches with delete or clear all 5. System-level shortcuts • Home Screen and Lock Screen widgets for daily function, progress, favorites, and quizzes • Tap progress widget for stats; quiz widget recommends the next unlearned quiz; refresh daily function in widget • Siri and Shortcuts for Home, Continue Learning, Stats, Playground, Quiz, Favorites, Search, and functions • Spotlight, deep links, and up to 4 Home Screen quick actions separate from Home shortcuts 6. Built for real use • All content offline on launch; optional iCloud sync for progress, favorites, and Home shortcuts • Export and import JSON to restore favorites, progress, quiz scores, wrong answers, searches, and Playground state • Five alternate app icons on iOS; Light, Dark, or System; widgets can follow the app theme • Languages: System, Simplified Chinese, Traditional Chinese, English • iPhone, iPad, and Mac with independent layout columns on larger screens • Widgets, shortcuts, and guides built in; first launch includes iCloud tips and habit setup • Feedback, rating, Share App, and smooth animations and haptics throughout 7. v1.2.0 highlights • Learning Stats dashboard, customizable Home shortcuts, wrong-answer review, and data backup • Expanded Playground, richer detail pages, smarter search, five alternate icons, and more Siri shortcuts iExcel is an independent study and reference tool, not affiliated with Microsoft. The Playground is a lightweight demo on sample data, not a full spreadsheet engine. Excel is a trademark of Microsoft. Start today. Build your Excel skills with functions, tips, and quizzes.
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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.
Not assessed in a Build Kit yet.
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.