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
Control Ultimate Edition
A corruptive presence has invaded the Federal Bureau of Control… Only you have the power to stop it
$4.99 · In-app purchases
OVERALL US RANK
#88
Paid · all categories
REVENUE (Est)
$125K/mo
$68K - $182K
RATING
★ 4.0
310 ratings · Top 30%
Evidence scope: #88 is the current overall US Paid chart position. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.
Build your own version
Build Kit
Make this idea yours
A product spec, screen plans, and build steps for your coding agent.
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Combine features and design from your favorite apps.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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/
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 Control Ultimate Edition: map the core Games 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
Offer affordable ad-free tier ($2.99)
Assumption to check: Too many intrusive ads
Validate with people who use this workflow before building.
Hypothesis 2
Cosmetic-only purchases, skill-based progression
Assumption to check: Pay-to-win mechanics
Validate with people who use this workflow before building.
Hypothesis 3
Add battery saver mode, optimize rendering
Assumption to check: Battery drain
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
A corruptive presence has invaded the Federal Bureau of Control… Only you have the power to stop it. The world is now your weapon in an epic fight to annihilate an ominous enemy through deep and unpredictable environments. Containment has failed, humanity is at stake. Will you regain control? Winner of over 80 awards, CONTROL is a visually stunning third-person action-adventure that will keep you on the edge of your seat. Blending open-ended environments with the signature world-building and storytelling of renowned developer, Remedy Entertainment, CONTROL presents an expansive and intensely gratifying gameplay experience. CONTROL Ultimate Edition has now been adapted to iOS. We have implemented touch controls and made changes to the in-game UI and game mechanics, like aiming and puzzles to provide a great experience for supported touch devices. The game renders beautifully through Metal and supports Ray Tracing on supported hardware. Key features UNCOVER THE MYSTERIES: Can you handle the bureau’s dark secrets? Unfold an epic supernatural struggle, filled with unexpected characters and bizarre events, as you search for your missing brother, and discover the truth that has brought you here. EVERYTHING IS YOUR WEAPON: Unleash destruction through transforming weaponry and telekinetic powers. Discover new ways to annihilate your enemies as you harness powerful abilities to turn everything around you into a lethal weapon. EXPLORE A HIDDEN WORLD: Delve deep into the ominous expanses of a secretive government agency. Explore the Bureau’s shifting environments only to discover that there is always more than meets the eye… FIGHT FOR CONTROL: Battle a relentless enemy through exciting missions and challenging boss fights to earn powerful upgrades that maximize abilities and customize your weaponry. CONTROL Ultimate Edition on iOS supports the following MetalFX features: MetalFX TAAU - Temporal Anti-Aliasing and upscaling MetalFX Frame Interpolation Ray-Tracing is supported on devices with M3+ or A19 Pro with 10Gb of memory.
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
Unity
Firebase
AdMob
RevenueCat
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.
