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
Short Option Calculator
To all Option Wheel strategy traders: This app makes it super easy to calculate your annualized yield in just a few seconds - which is the key to properly execute income strategies in option trading.
$2.99
PRICE
$2.99
No 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.
Build your own version
Build Kit
Make this idea yours
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Add to a Remix
Combine features and design from your favorite apps.
Kit ready. Verify your email to download it.
Generating… usually about a minute.
Make it yours Optional
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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/
Preview a sample Build Kit No email needed
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.
JavaScript is required to complete mailbox verification.
Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Short Option Calculator: map the core Finance workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
Preview ready. Verify your email to reveal and copy the full prompt.
JavaScript is required to complete mailbox verification. Return to this prompt preview.
Continue in Rork >
Affiliate link: CloneChart may earn a commission at no extra cost
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
Integrate visual graphs and trends for better financial insights.
Assumption to check: Lack of detailed analytics or reporting features
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to save preferred settings for easier access.
Assumption to check: Limited customization options for calculation parameters
Validate with people who use this workflow before building.
Hypothesis 3
Implement a help section or tutorial to guide new users.
Assumption to check: No user support or help section
Validate with people who use this workflow before building.
Hypothesis 4
Add a forum or chat for users to discuss strategies.
Assumption to check: Absence of a community or social feature
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
To all Option Wheel strategy traders: This app makes it super easy to calculate your annualized yield in just a few seconds - which is the key to properly execute income strategies in option trading. Especially when trading mobile, this App will enable you to improve and speed up your decision making significantly - by providing you with annualized yield figures in a snap. You can set relevant parameters and see how adjusting these parameters will impact your yield. You no longer need to rely on your gut feeling, since you will get reliable yield indications super fast: * Pick your strike price and optionally margin requirement * Slide your option premium up and down * Play with different expiration dates * Simulate yield impact of closing an option position early * Set your individual brokerage fees and tax rate -> You will see your calculated annualized gross yield, yield after fees and yield after fees & taxes (cash secured and on margin) About the Option Wheel strategy: In this strategy, the option trader aims at increasing his yield and collecting additional cash flow by repeatedly selling Cash Secured Put Options until assigned. Then, in the shareholder phase, the investor is collecting dividends and keeps selling Covered Call Options until assigned again - which brings the investor back to the Cash Secured Put phase. The strategy can be optimised, when the investor avoids assignment by rolling the position. The investor would aim at yields that are above the long term market average - to compensate the additional work he needs to invest. This calculator was developed to support on this endeavor. **DISCLAIMER** The information shown in the app does not represent any investment or investment strategy recommendations for trading in securities, but serves solely for personal information or entertainment and is in no way to be understood as an invitation to trade in securities. The information shown does not constitute business, legal or tax advice and is no substitute for individual advice from an expert. If you make use of the information provided, you always act entirely at your own risk.
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
< Scroll to see more >
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 Navigation
Formik
Yup
Axios
React Native Reanimated
Expo
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.
