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
Hashtag Genius: AI Captions
Hashtag Genius is the all-in-one app for Instagram and TikTok influencers looking to increase likes and followers
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.9
22 ratings · Top 50%
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/
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 Hashtag Genius: AI Captions: 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
Allow users to customize generated captions and hashtags before saving.
Assumption to check: Limited customization options for captions and hashtags
Validate with people who use this workflow before building.
Hypothesis 2
Integrate sharing options to popular social media platforms.
Assumption to check: No social sharing features
Validate with people who use this workflow before building.
Hypothesis 3
Implement offline caching for generated content.
Assumption to check: Inconsistent performance on slow networks
Validate with people who use this workflow before building.
Hypothesis 4
Enhance AI capabilities to better understand context and tone for captions.
Assumption to check: Limited AI understanding of nuanced content
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
Hashtag Genius is the all-in-one app for Instagram and TikTok influencers looking to increase likes and followers. With Hashtag Genius, you can easily find trending hashtags, generate captions, and boost engagement on your posts. How it works: • Select a photo and let our AI detect the content. • Get the top trending hashtags for your post. • Generate catchy captions with our AI Caption Generator. • Copy and paste hashtags and captions in one click. Why Hashtag Genius? • Discover popular and trending hashtags without exceeding limits. • Increase your likes and followers with smarter hashtags. • Avoid blocked or misleading Instagram hashtags with our algorithm. • Generate engaging captions to make your posts stand out. Features: • AI-powered hashtag search and suggestion. • AI Caption Generator for creative, catchy captions. • Auto-generate tags using AI. • Copy and paste top hashtags easily. • Stay up-to-date with trending Instagram and TikTok hashtags. Grow your social media effortlessly and make every post count with Hashtag Genius. Privacy Policy: https://digitalhole.github.io/HashtagGenius Terms of Use (EULA): 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
Axios
Zustand
React Query
Firebase
BUILD KIT DIFFICULTY
Intermediate
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.
