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.
App Overview
Letters from a Stoic
Embark on a Journey of Stoic Wisdom: Letters from a Stoic by Seneca brings the timeless letters of one of Rome’s greatest philosophers directly to your fingertips
$3.99 · In-app purchases
PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included15 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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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Letters from a Stoic: 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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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
Incorporate daily letters or community submissions.
Assumption to check: Limited content variety may lead to user boredom.
Validate with people who use this workflow before building.
Hypothesis 2
Add a community forum or discussion boards.
Assumption to check: No social features to share insights or discussions.
Validate with people who use this workflow before building.
Hypothesis 3
Introduce interactive elements such as quizzes or reflections.
Assumption to check: Static reading experience may lack engagement.
Validate with people who use this workflow before building.
Hypothesis 4
Offer a freemium model with basic content access.
Assumption to check: Subscription model may deter potential users.
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
Embark on a Journey of Stoic Wisdom: Letters from a Stoic by Seneca brings the timeless letters of one of Rome’s greatest philosophers directly to your fingertips. Designed for modern readers, this app offers an intuitive and enriching way to explore the wisdom of Seneca's 124 letters, providing valuable reflections on life, virtue, and resilience. CORE FEATURES: - Elegant Carousel Interface: Each of the 124 letters from Letters from a Stoic unfolds in a beautifully designed carousel interface. This unique feature allows you to leisurely absorb the insights of Seneca, making his profound teachings more accessible and engaging. - Customizable Reading Experience: Tailor your reading experience with six different font types and adjustable font sizes. Whether you're reading at home or on the go, this app ensures a comfortable and personalized reading journey. - Favorite and Revisit: Click the heart symbol to favorite any letter or section. Your chosen passages are then conveniently listed on your favorites page, making it easy to return to the sections that resonate with you the most. - User-Friendly Navigation: Glide through the letters of Seneca with simple left or right swipes. The app’s content section provides a seamless way to navigate directly to any letter, enhancing your exploration of Stoic philosophy. - Golden Touches for Favorites: Your favorited sections are not only stored for quick access but are also highlighted in golden font in the contents list, adding a visually pleasing and practical element to your reading journey. Letters from a Stoic by Seneca is a gateway to ancient knowledge and personal growth through Stoicism. Immerse yourself in the reflective words of one of Rome's most prominent thinkers and find inspiration in his timeless advice on living a meaningful life. Let this app be your guide to understanding and integrating Seneca's wisdom into your daily life. Bundle with Meditations by Marcus Aurelius: For those interested in exploring Stoic philosophy further, both apps — 'Letters from a Stoic' and 'Meditations by Marcus Aurelius' — are available together in a discounted bundle. By purchasing this bundle, you'll get both apps at a lower price than buying them separately, giving you access to two of the most famous Stoic works in one convenient package.
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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
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Expo
Zustand
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BUILD KIT DIFFICULTY
Starter
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.
