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
BFF: Make friends & meet up
Join millions already using the new Bumble BFF to connect, chat, and build friendships that last.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.2
8,337 ratings · Top 30%
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/
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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 BFF: Make friends & meet up: map the core Social Networking 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 better filtering and matching algorithms.
Assumption to check: Difficulty in finding friends with shared interests.
Validate with people who use this workflow before building.
Hypothesis 2
Enhance messaging and activity sharing capabilities.
Assumption to check: Limited interaction features between users.
Validate with people who use this workflow before building.
Hypothesis 3
Offer more granular control over user visibility and interactions.
Assumption to check: Inadequate privacy settings.
Validate with people who use this workflow before building.
Hypothesis 4
Introduce smarter notification management options.
Assumption to check: Overwhelming notifications.
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
Join millions already using the new Bumble BFF to connect, chat, and build friendships that last. Find Your People Whether you’re new to town, starting college, moving through a life shift, or just want to meet people who get you, Bumble BFF is built to make finding your people easier and safer. It’s a space where real friendships can start with a chat and deepen through shared interests. Whoever you are and whatever you're into, you can find your people here. Tools That Support You at Every Step of Friendship Let your profile reflect who you are Use bios, custom Interest Tags, and Photo Prompts to share more of who you are and meet friends who can relate. Find your kind of people Discover profiles that share your hobbies, lifestyle, and goals. Whether you're into run clubs, gaming, booktok, or brunch, your future friends are here. Photo-verified community Every match has passed selfie verification, so you can feel confident connecting. More ways to make friends Kick things off in a one-on-one chat, or join Groups to meet more people who are into the same things you are. Build your community in Groups Use chat, posts, and video calls to stay connected, share ideas, and plan IRL hangouts with friends who share your interests. Everything is free From planning events to building Groups, every feature on Bumble BFF is completely free. No paywalls, no upgrades, no locked features. Looking for friends who just get you? Bumble BFF helps you find your people in the same city, at the same stage of life, with the same energy. Download the app and start meeting them today. Bumble Inc. is the parent company of BFF, along with Bumble and Badoo.
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
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BUILD KIT DIFFICULTY
Expert
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.
