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
Contraceptive Ring Reminder +
Contraceptive Ring Reminder + is the perfect app to keep track of your contraceptive ring birth control with a beautiful, intuitive, and easy-to-use design.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
10,428 ratings · Top 5%
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 included17 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.
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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 Contraceptive Ring Reminder +: map the core Medical 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
Implement a dashboard to view and manage all reminders in one place.
Assumption to check: Users find it hard to manage multiple reminders.
Validate with people who use this workflow before building.
Hypothesis 2
Enhance notification system to ensure timely alerts.
Assumption to check: Notifications can be unreliable.
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to customize reminder sounds and frequencies.
Assumption to check: Limited customization options for reminders.
Validate with people who use this workflow before building.
Hypothesis 4
Simplify UI with a more intuitive layout and design.
Assumption to check: User interface can be cluttered.
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
Contraceptive Ring Reminder + is the perfect app to keep track of your contraceptive ring birth control with a beautiful, intuitive, and easy-to-use design. It's very simple to set up and use. You just have to select how many days you stay with the ring, and the app will start notifying you when you'll have to insert or remove your contraceptive ring. In addition, you can always check the status of the current ring. Contraceptive Ring Reminder + is the application you need to keep track of your ring: easy, effective, and free! FEATURES WE LOVE • Cycle overview • Custom calendar with notes for each day • Custom notifications • What time to insert or remove your ring • Total control over your cycle • Automatic backup of your data to iCloud • And much more… PREMIUM FEATURES • Ad-free Ad sponsors help us keep offering the free version. By becoming Premium, you won't see ads anymore. • Custom notifications Premium users have access to advanced customization options like sounds, intervals, time, and more. • Time to insert / remove the ring Premium users have the option to select the exact time they want to insert and remove their rings. REVIEW If you like it and find it useful, please review the app! This means the world to us. Your love will keep motivating us, and it will also influence other users. Reviews are the best way to prove that this app is great. Please review us! SUPPORT If you have any feedback or run into issues, please contact us via email at [email protected]. We're always happy to help! SUBSCRIPTION DETAILS Premium features require an auto-renewable subscription. You will be charged per month or year to use them. Payment will be charged to iTunes Account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal. Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. No cancellation of the current subscription is allowed during active subscription period. Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. Terms and Conditions: https://www.cauim.co/tos Privacy Policy: https://www.cauim.co/privacy
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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.
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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.
