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
Merge & Mix Emoji: Mixermoji
From the creators of Emoji Up and SwipeMoji comes MixerMoji — the app that lets you mix and create unique emojis in seconds.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
7,169 ratings · Top 15%
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.
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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 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 Merge & Mix Emoji: Mixermoji: map the core Graphics & Design 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 upload custom emojis.
Assumption to check: Limited emoji customization options.
Validate with people who use this workflow before building.
Hypothesis 2
Optimize emoji loading with pagination.
Assumption to check: Performance issues when loading large emoji sets.
Validate with people who use this workflow before building.
Hypothesis 3
Integrate direct sharing options to platforms.
Assumption to check: Difficulty in sharing mixes to social media.
Validate with people who use this workflow before building.
Hypothesis 4
Provide clearer information about premium features.
Assumption to check: In-app purchase confusion.
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
From the creators of Emoji Up and SwipeMoji comes MixerMoji — the app that lets you mix and create unique emojis in seconds. Key Features: Mix & Create: Combine two emojis to instantly generate a brand-new one. Cross-App Magic: Import emojis from Emoji Up and SwipeMoji, then mix them together for even more possibilities. Endless Combinations: Explore infinite mixes — every emoji you design is unique. Save Your Favorites: Build your personal collection of custom emojis. Share Anywhere: Send your creations to friends and make every chat stand out. Funny, Cute & Unexpected: Design emojis that match your mood and imagination. Express Yourself: Go beyond the default keyboard and develop your own emoji style. Terms of service: https://tally.so/r/LZ9aD2 Privacy and Policy: https://tally.so/r/Nprbop
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
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Axios
BUILD KIT DIFFICULTY
Advanced
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.
