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
Tweakr: Timeline Controls
Tweakr is a Safari extension that gives you real control over X.
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 included16 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 Tweakr: Timeline Controls: 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
Introduce gamification elements like badges and rewards for engagement.
Assumption to check: Limited user engagement features compared to competitors.
Validate with people who use this workflow before building.
Hypothesis 2
Implement a trending section for posts and users.
Assumption to check: User discovery is challenging with no trending content.
Validate with people who use this workflow before building.
Hypothesis 3
Add reporting features and content moderation options.
Assumption to check: No moderation tools for user-generated content.
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to customize and filter timelines for better management.
Assumption to check: Complexity in managing multiple timelines.
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
Tweakr is a Safari extension that gives you real control over X. No bloat, no accounts, no tracking — just a focused set of tools for people who use the timeline as a workspace. PRESETS Switch between Minimal, Markets, Builders, and News modes in one tap. Each preset applies a tuned set of defaults so you don't hand-toggle every switch. COUNTRY & REGION FILTERS Block specific countries or regions from the For You timeline. Stack with content-focus bundles for tighter control over what shows up. FEED QUALITY Set minimum follower counts and account-age thresholds. Low-quality accounts stop flooding your feed. Accounts you follow always stay visible. TIMELINE CONTROLS • Lock to the Following tab — stop X from switching you back to For You • Sort Following chronologically • Control retweets and quote tweets separately • Hide the For You tab entirely CLEANER INTERFACE • Remove Grok, Premium, Jobs, and inline upsells from the sidebar • Hide view counts and engagement metrics • Restore headlines under external links • Adjust timeline density — Compact, Balanced, or Relaxed TWITTER BRANDING Bring back the bird logo, blue accent color, and "Tweet" language. LOCATION CONTEXT See country flags on tweets so you know where posts come from. PRIVACY FIRST All settings are stored locally on your device. Tweakr does not collect data, require an account, or phone home. Ever. Works on iPhone, iPad, and Mac with a single purchase.
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.
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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.
