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
Doodle God™
Over 190 Million Players Worldwide!
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.6
4,037 ratings · Top 15%
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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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/
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 Doodle God™: 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
Introduce more combinations and dynamic content updates.
Assumption to check: Limited element combinations can lead to repetitive gameplay.
Validate with people who use this workflow before building.
Hypothesis 2
Implement an interactive tutorial or hints system.
Assumption to check: Some users find the tutorial insufficient for complex combinations.
Validate with people who use this workflow before building.
Hypothesis 3
Implement optional ad viewing for rewards instead of forced ads.
Assumption to check: Frequent ads can interrupt gameplay.
Validate with people who use this workflow before building.
Hypothesis 4
Clarify pricing and benefits of in-app purchases through better UI.
Assumption to check: In-app purchases can be confusing for users.
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
Over 190 Million Players Worldwide! Available in 13 Languages UNLEASH YOUR INNER GOD AND CREATE A UNIVERSE In this addictive, ALL ages, puzzle game mix and match different combinations of fire, earth, wind and air to create an entire universe! As you create each element watch your world come alive as each element animates on your planet. The new “Planet” mode offers a new challenging way to create a universe of your dreams. Of course the universe was not created in a day. You’ll have to work your up from a simple microorganism to create animals, tools, storms and even build armies before you have what it takes to build the universe! But beware, the power of creation may have unintended consequences, inventing the wheel might just trigger a zombie plague… Don’t worry, you are not alone on this cosmic journey! Every time you successfully create a new item you’ll be rewarded with the wit and wisdom of some of the greatest philosophers and comedians of all time. Unleash your inner god with Doodle God™! NEW GAMEPLAY FEATURES - Now available in 13 languages: English, Dutch, French, Spain, Italian, Russian, Japanese, Chinese, Korean, Portuguese, Swedish, Polish & German. - NEW Visual “Planet” Mode allows players to see their planet come alive as you play. - NEW “Mission” Mode offers new challenging puzzles - New Artifacts Mode: Collect ancient artifacts like Stonehenge created by amazing triple reactions. - Mold fire, wind, earth and air to create the Universe. - Create 300+ advanced items and concepts. - Intuitive one-click game play encourages thoughtful, creative play - Hundreds of interesting, funny and thought-provoking quotes and sayings. - New “Puzzle” mode. Create locomotives, sky scrappers and more - New “Quests” mode. Can you save the Princess or escape a Desert Island? - New reactions with existing elements and episodes. - New achievements. - New Elements encyclopedia with wikipedia links. - Improved mini-games for arcade fans. CRITICS LOVE IT! > Apple REWIND AWARD > “Wonderfully unique concept. Deeply satisfying!” – GameZebo > “Giving it huge thumbs up!" - TUAW > “It’s addictive. Insanely so! Lots of fun.” – 148Apps > “Discovering each new element was an utter delight." - AppSafari > "You'll have to use your creativity… ruthlessly addictive." - Slide2Play > "I would recommend buying it, definitely worth it!” - TouchGen Follow us to get early access to exclusive content, price drops and updates: LIKE: www.facebook.com/doodlegod FOLLOW: www.twitter.com/joybitsmobile Check out our other exciting games! Doodle Devil™ & Doodle Farm™
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
Zustand
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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.
