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
Fluently: AI Language Learning
Fluently: Speak Languages with an AI Tutor
Free
PRICE
Free
No in-app purchases
BUSINESS MODEL
Free
No overall Grossing estimate available
RATING
★ 4.8
5,698 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 included
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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Fluently: AI Language Learning: map the core Education 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 offline downloads for lessons and materials.
Assumption to check: Limited offline capabilities for lessons
Validate with people who use this workflow before building.
Hypothesis 2
Integrate AI to provide real-time feedback and suggestions.
Assumption to check: Lack of personalized feedback on user performance
Validate with people who use this workflow before building.
Hypothesis 3
Introduce a guided learning path to simplify content delivery.
Assumption to check: Users may feel overwhelmed with content
Validate with people who use this workflow before building.
Hypothesis 4
Ensure progress sync across devices for a seamless experience.
Assumption to check: Inconsistent progress tracking across devices
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
Fluently: Speak Languages with an AI Tutor Stop memorizing boring rules. Start speaking. Fluently helps you learn languages through real conversations with your personal AI tutor. Talk about topics you enjoy, get instant corrections, and build the confidence to speak naturally — anytime, anywhere. HOW IT WORKS 1. Choose the language you want to practice 2. Start a conversation with your AI tutor 3. Get real-time corrections and a personalized plan to improve faster WHY FLUENTLY? - Learn through speaking, not endless grammar drills - Improve your grammar, vocabulary, and pronunciation - Get personalized feedback based on your speech and interests - Build confidence for interviews, meetings, travel, and everyday conversations - Practice whenever it works for you — without pressure or judgment FEATURES - Real conversations with a personal AI tutor - Instant corrections and advanced feedback - Personalized language-learning program - Vocabulary and grammar support - Progress tracking with tangible improvements - Simple, intuitive design — just open the app and start speaking FLUENTLY PREMIUM Get unlimited access to personalized AI speaking sessions, advanced feedback, and progress tracking. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage your subscription in iTunes Account Settings. Terms of Service: https://getfluently.app/tos Privacy Policy: https://getfluently.app/privacy License Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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
Supabase
React Navigation
Axios
React Native Video
BUILD KIT DIFFICULTY
Not assessed in a Build Kit yet.
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.
