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
Fremail - AI Email Generator
Write professional emails in seconds with Fremail - the smarter AI email assistant that saves you time and money.
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
1 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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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 Fremail - AI Email Generator: map the core Business 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
Allow users to create custom templates and save their preferences.
Assumption to check: Limited customization options for generated emails
Validate with people who use this workflow before building.
Hypothesis 2
Provide a preview and editing features for better user control.
Assumption to check: Potential difficulty understanding AI-generated content
Validate with people who use this workflow before building.
Hypothesis 3
Offer clear explanations of features tied to each subscription tier.
Assumption to check: Subscription model may confuse users
Validate with people who use this workflow before building.
Hypothesis 4
Implement share functionality to directly send emails through popular platforms like Gmail.
Assumption to check: Lack of integration with existing email services
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
Write professional emails in seconds with Fremail - the smarter AI email assistant that saves you time and money. Struggling with email writing? Fremail transforms how you communicate by helping you generate perfect emails 10X faster. Our powerful AI creates professional, engaging content for any situation. Key Features: Instant Email Creation - Generate complete, polished emails from simple prompts Smart Replies - Craft perfect responses to any inbox message Multiple Tones - Switch between friendly, formal, persuasive and more Global Communication - Write confidently in 16+ languages Incredibly Cost-Effective: With your own API connection, you'll spend just $0.30 for approximately 100 emails - a fraction of what subscription services charge. Why Fremail Is Different: Unlike subscription-based alternatives, Fremail offers a one-time purchase with your choice of API provider. Buy once, use forever, with no recurring fees. Perfect For: Business professionals creating client proposals and follow-ups Job seekers crafting applications and interview responses Teams needing consistent communication Anyone who wants to save time on email writing Download Fremail today and experience smarter, more cost-effective email writing!
Written user reviews are not shown here. Check current App Store reviews >
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
React Native
Expo
Axios
SQLite
React Navigation
React Native Paper
BUILD KIT DIFFICULTY
Intermediate
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.
