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
Mutterly
Journaling made simple
$0.99 · In-app purchases
PRICE
$0.99
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 included18 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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Mutterly: map the core Health & Fitness 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 social sharing options and challenges.
Assumption to check: Limited user engagement features compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Offer personalized insights and recommendations based on user data.
Assumption to check: Lack of personalization in mood tracking
Validate with people who use this workflow before building.
Hypothesis 3
Implement notification reminders to encourage daily usage.
Assumption to check: No reminders for daily reflections
Validate with people who use this workflow before building.
Hypothesis 4
Provide detailed analytics and visualizations of mood data over time.
Assumption to check: Limited analytics on mood trends
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
Journaling made simple. Just speak. Voice Journal transforms your scattered thoughts into meaningful daily reflections—perfect for busy people who want mindfulness without the effort. THE 15-SECOND SOLUTION Quick Voice Notes Record 15-second voice notes throughout your day. No typing, no writing, no excuses. Perfect for capturing thoughts on the go, in the car, or whenever inspiration strikes. AI-Powered Daily Summaries At the end of each day, get a beautiful AI-generated reflection of everything you've shared. Discover patterns, insights, and moments you might have forgotten. Your personal AI coach summarizes your day. Automatic Transcription Every voice note is instantly transcribed to text using Apple's advanced speech recognition. Search your thoughts, review your day, and never lose an important moment. Zen-Like Simplicity Minimalist design with soft colors and thoughtful spacing. No clutter, no complexity—just you and your thoughts. The calm interface helps you focus on what matters. Timeline & Dashboard • See today's recordings at a glance • Browse all your daily summaries in a beautiful timeline • Expand transcripts to read full entries • Track your journaling streak and progress Your Privacy, Your Control All transcriptions happen on-device when possible. Your audio stays on your phone. Your thoughts remain yours. PERFECT FOR: • Busy professionals who want to journal but don't have time • People who prefer speaking over writing • Anyone seeking daily mindfulness and self-reflection • Those who want AI-powered insights from their thoughts • Mindful individuals looking for a simpler journaling experience HOW IT WORKS: 1. Record 15-second voice notes whenever you think of something 2. Speak naturally—no need to be formal or structured 3. Get an AI summary at the end of each day 4. Review your reflections and discover patterns in your thoughts WHY VOICE JOURNAL? Traditional journaling takes time. Voice Journal gives you the benefits of journaling—self-reflection, mindfulness, and emotional processing—in seconds, not hours. The 30-second format forces clarity. You'll capture what's truly important, not ramble. And the AI summaries help you see the bigger picture of your life over time. DOWNLOAD ONCE, OWN FOREVER Includes all features with automatic updates and improvements. Start your mindful journey today. Your thoughts matter. Give them a voice.
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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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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.
