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
Crsel: Carousel, Collage Maker
Crsel is the all-in-one app for creating aesthetic Instagram carousels, collages, stories, and Reels covers
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
3,294 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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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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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 Crsel: Carousel, Collage Maker: map the core Photo & Video 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
Offer a wider range of customizable templates and advanced editing features.
Assumption to check: Limited template customization options
Validate with people who use this workflow before building.
Hypothesis 2
Optimize image and video processing for better performance.
Assumption to check: Performance issues with large media files
Validate with people who use this workflow before building.
Hypothesis 3
Introduce real-time collaboration for shared projects.
Assumption to check: Lack of collaborative features
Validate with people who use this workflow before building.
Hypothesis 4
Provide clearer explanations of premium features and subscription benefits.
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
Crsel is the all-in-one app for creating aesthetic Instagram carousels, collages, stories, and Reels covers. Designed for creators who care about storytelling and style. • Use our seamless Instagram Carousel Maker. Design multi-slide posts that connect visually. Align elements across frames and preview the full swipe effect. Perfect for photo series, lookbooks, tutorials, or storytelling posts. •From clean, minimal layouts to bold, layered collages, Crsel gives you everything you need to design posts that feel intentional, premium, and uniquely yours. •Trendy Collage Templates. Choose from layered, editorial-style templates made for storytelling! Combine multiple photos, add text, and guide your audience through a visual journey. • Story Templates That Match Your Feed. Create IG stories and Reels covers using the same style as your carousels. Maintain a cohesive aesthetic across all your content, from feed to story highlights. • Reels Cover Designer. Design eye-catching Reels thumbnails that match your feed. Crsel helps you maintain a polished and branded look across all formats • AI Cutout Tool. Automatically remove backgrounds from photos with one tap. Easily layer people, objects, or products over textured backdrops and collage elements. Whether you're sharing a photo dump, promoting a product, or just curating your visual world. Crsel helps you craft posts that flow! Who It’s For? Crsel is built for anyone who tells stories visually: - Instagram creators & influencers - Lifestyle bloggers & photographers - Brands & small businesses - Anyone building a curated feed or portfolio - Aspiring Creators Whether you're recapping a trip, launching a product, or simply posting memories. Crsel gives your content clarity, flow, and visual impact. Your feed is your story. Tell it beautifully with Crsel. Download now and elevate your Instagram presence! Terms of use: https://crselapp.com/terms-of-use Privacy policy: https://crselapp.com/privacy-policy Got a question about Crsel? Contact us at [email protected]
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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
React Native
Expo
Zustand
React Navigation
Axios
react-native-reanimated
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.
