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
Streets of Rage 4
Punch your way through the Streets of Rage once again!
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.9
2,809 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/
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 Streets of Rage 4: 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
Improve touch responsiveness and feedback.
Assumption to check: Controls can feel unresponsive at times
Validate with people who use this workflow before building.
Hypothesis 2
Introduce more varied daily challenges and unlockable content.
Assumption to check: Limited replayability after completing levels
Validate with people who use this workflow before building.
Hypothesis 3
Offer more transparent value for in-app purchases and reduce intrusive prompts.
Assumption to check: In-app purchases can feel intrusive
Validate with people who use this workflow before building.
Hypothesis 4
Implement better character balancing and feedback to enhance gameplay experience.
Assumption to check: Difficulty balancing between characters
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
Punch your way through the Streets of Rage once again! Streets of Rage 4 takes forward the Streets of Rage legacy in this retro beat'em up with hand-drawn comic inspired graphics and updated mechanics. Streets of Rage comes back for a sequel 25 years after the last episode : a new crime syndicate seems to have taken control of the streets and corrupted the police. All you have to fight against them is your friends... and your fists ! Critically acclaimed, Streets of Rage 4 won several awards and nominated as Best Action Games at the 2020 Game Awards. FEATURES - Rediscover the classic Beat em up Streets of Rage Franchise with new fight mechanics - Get thrilled by the Retro hand-drawn comics-inspired artistic direction by the studio behind Wonder Boy: The Dragon’s Trap serving juicy animations & vivid FX - Unlock up to 5 new & emblematic playable characters and fight your way through 12 various stages to bring back order to the streets - Challenge yourself in different modes : Story, Training, Arcade... - Listen to a new Electro OST with world class musicians such as Olivier Derivière and legend Yuzo Koshiro - Brand-new custom survival mode to the DLC (Mr. X Nightmare) - New destroyables to help to maintain the combo counter"- Get retro with up to 13 alternative retro characters, secret retro levels or choose the SoR1&2 OST and enable the Retro Pixel graphics ! * NEW MAJOR FREE UPDATE* - New co-op moves - +300 in-game improvements - Brand-new custom survival mode to the DLC (Mr. X Nightmare) - New destroyables to help to maintain the combo counter -MULTIPLAYER UPDATE- - Play online with a partner and gang up to defeat the Y twins' evil plan together! - Test your strength : hop in Battle Mode and fight your friends across your favorite levels" -Mr. X Nightmare DLC- The fight continues in Wood Oak City. After the events of Streets of Rage 4, our heroes wanted to prepare themselves for future threats. Axel, Blaze and their mates will start a very special deranged training with the help of Dr. Zan, who built an AI program from the remnants of Mister X’s brain that simulates every kind of danger they could be facing. With this DLC, get ready for: • 3 new playable characters • A new Survival mode with weekly challenges • Character customization: build your own fighting style with new moves • New weapons and enemies!o note that multiplayer mode will not be available at launch but will come in a free update after release. CAREFULLY REDESIGNED FOR MOBILE - Revamped interface - Game Center achievements - iCloud - Share your progress between iOS devices - Compatible with MFicontrollers - No micro-transactions! Crack your knuckles and get ready for Streets of Rage 4 everywhere you go! If you run into a problem, please contact us at [email protected] with as much information as possible on the issue, or check our FAQ at https://playdigious.helpshift.com/hc/en/6-streets-of-rage-4/
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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 Navigation
Expo
React Native Gesture Handler
Async Storage
Redux
React Native Reanimated
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.
