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
Stimuler- English Speaking App
Ever wondered how you can ace the IELTS Speaking section or practice your English speaking skills with just your smartphone?
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
6,715 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's included18 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 Stimuler- English Speaking App: 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 course materials.
Assumption to check: Limited offline capabilities; users cannot download lessons.
Validate with people who use this workflow before building.
Hypothesis 2
Introduce gamification elements and varied quiz formats.
Assumption to check: Few interactive features; quizzes may be repetitive.
Validate with people who use this workflow before building.
Hypothesis 3
Create adaptive learning paths based on user progress.
Assumption to check: Lack of personalized learning paths.
Validate with people who use this workflow before building.
Hypothesis 4
Add a community forum or discussion boards for users.
Assumption to check: No community features; users cannot engage with each other.
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
Ever wondered how you can ace the IELTS Speaking section or practice your English speaking skills with just your smartphone? Enter Stimuler! Dive deep into the realm of English speaking practice, meticulously crafted by a team of IITians, a World Public Speaking Champion, and multiple IELTS 8.5 Band achievers. DOWNLOAD STIMULER NOW! Boasting a community of 12Mn+ users from 200+ countries and a glowing 4.8/5* rating, Stimuler isn’t just another English learning app – it's an English-speaking revolution! Why is Stimuler the talk of the town? * 60-Second Magic: Record a 60-second speech and get instant feedback on your pronunciation, fluency, vocabulary, and more in less than 20 seconds. Plus, an immediate IELTS band score to gauge your progress. * Real-life IELTS Simulation: Industry-first Live Video Mock Tests that mirror the real IELTS experience with our proprietary AI Interviewer. Engage, speak, and receive exhaustive performance insights instantly alongside your overall IELTS Speaking band! * Speak Your Mind: With over 100 diverse speaking topics, you're spoilt for choice. Perfect for IELTS, TOEFL, or just some casual English conversation practice. * Speech Insights: Dive deeper than scores. From filler words, pace, and tone to awkward pauses, get a 360-degree view of your speaking prowess. * Tailored Tips After Every Session: We believe feedback is the breakfast of champions. Get personalized pointers after every session, crafted just for you. Features that set us leagues apart: * Global Recognition: We're not just loved by our users. We've been spotlighted as one of the top 100 promising apps of 2023 and have the backing of top-tier VCs from Silicon Valley, Japan, and India. * Proprietary Voice AI Technology: Our state-of-the-art voice AI has been refined using millions of user speeches, spanning every single country on the planet. This ensures unparalleled feedback accuracy and insights. * Fast and Flexible: Whether you've got hours or just 10 minutes a day, see tangible results with Stimuler. What's more? Every speech gets comprehensive feedback in less than 30 seconds! * Affordable Premium Perks: At a nominal price of less than $5/month, unlock a universe of features. A tailored practice roadmap of speaking exercises, 15+ full-length IELTS Speaking mock tests, and much more awaits you. Here's the best part: Stimuler is FREE for everyone. Dive in, practice speaking, gather feedback, and watch yourself transform day by day. For those aiming for the stars, our premium suite is your rocket ship. From rigorous IELTS speaking preparation to breezy English conversation sessions – Stimuler is your pocket mentor. Flexible, blazing fast, and proven, with users witnessing a whopping 20% enhancement in speaking and conversational skills in just a month! So, why wait? Whether you're gearing up for your IELTS speaking test or just looking to brush up on your English conversation skills, Stimuler is too good to miss out on. Remember, real progress happens when you practice, not just watch. It's free to download, and it's high time you took your English speaking to the next level. Speak, Evolve, Triumph! Terms of Use- https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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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
expo-av
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.
