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.
Master the sacred language of the Catholic Church
$4.99 · 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 Lingua Sacra: 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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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: Lack of personalized learning paths.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited offline access to courses.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No gamification elements to engage users.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No social features for interaction.
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.
Master the sacred language of the Catholic Church. Lingua Sacra combines gamified Latin learning with authentic liturgical content — prayers, Mass responses, Vulgate Scripture, Gregorian chant, the Liturgy of the Hours, and now Patristic, Scholastic, and Manuscript Latin. FEATURES: • 197 structured lessons across 18 tiers, from beginner greetings to reading actual medieval codices • 2,000+ vocabulary words with pre-recorded ecclesiastical Latin pronunciation • Tier 15 Liturgical Mastery: verse-by-verse drill of Te Deum, Pange Lingua, Tantum Ergo, Adoro Te Devote, Stabat Mater, Dies Irae, Magnificat, Benedictus, and the great sequences • Tier 16 Patristic Latin: Augustine, Jerome, Ambrose, Leo the Great, Gregory the Great, Benedict’s Rule, Bede • Tier 17 Scholastic & Magisterial: Aquinas’s Five Ways, Trent, Vatican I and II, Rerum Novarum, Humanae Vitae, Fides et Ratio • Tier 18 Codex & Manuscript: paleography, nomina sacra, scribal abbreviations, reading medieval folios • 26 classic prayers with word-by-word grammar (Ave Maria, Pater Noster, Salve Regina, and more) • Mass Companion for both Ordinary Form and Traditional Latin Mass (1962 Missale Romanum) • Office of the Day: opens to the canonical Hour matching time of day, with seasonal Marian antiphon • Saint of the Day from the Roman Calendar with Latin name, brief life, and citation • Curated Learning Paths: Path of the Priest, Path of the Scholar, Path of the Religious • Vulgate Bible reader with verse-by-verse Latin and English • Spaced repetition vocabulary review powered by FSRS • 168 graded Latin reading passages from simple stories to advanced theological narratives • Interactive paradigm tables for all 5 declensions and 4 conjugations • Liturgy of the Hours, Stations of the Cross, Rosary, and Sacramental Rites • Works fully offline — no internet required Whether you’re preparing for seminary, following the Traditional Latin Mass, homeschooling, reading the Fathers, or simply want to understand the prayers of the Church, Lingua Sacra makes Latin accessible and beautiful. Designed with the aesthetic of an illuminated manuscript — cathedral navy backgrounds, gold accents, and the elegant EB Garamond typeface.
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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.