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
100 Things: Zoo Animals - Video & Picture Book for Toddlers
100 Things: Zoo Animals Picture Book - for babies, small kids & toddlers - delivers 100s of HD photos, sounds & videos of real animals found in the wild
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
1 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 included15 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 100 Things: Zoo Animals - Video & Picture Book for Toddlers: map the core Books 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 interactive quizzes or games related to the animals.
Assumption to check: Limited interactivity; mostly static content.
Validate with people who use this workflow before building.
Hypothesis 2
Add more animal categories and facts to engage users.
Assumption to check: Lack of variety in animal content.
Validate with people who use this workflow before building.
Hypothesis 3
Simplify the purchasing process and clearly highlight what each purchase includes.
Assumption to check: In-app purchase confusion.
Validate with people who use this workflow before building.
Hypothesis 4
Implement voice narration and larger touch targets for ease of use.
Assumption to check: Limited accessibility features for toddlers.
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
100 Things: Zoo Animals Picture Book - for babies, small kids & toddlers - delivers 100s of HD photos, sounds & videos of real animals found in the wild. Tap the photos & videos to hear the animal sounds from zoos all over the world. Easy to use interface, 100 Zoo Animals is one of the best teaching apps for children wanting to learn about animals that can be found in zoos around the world including Asia, Africa, America and Australia. Beautiful HD photos offer a unique opportunity to see these animals in full detail. Have your child tap the photos to talk to the animals and hear their wonderful sounds! Get up close and personal with this fun and educational app for young kids and babies. TODDLER VIDEO PLAY • Swipe left or right to move to the next photo or video • 100% ad free • 100+ stunning HD photos & video • HD-quality resolution and sound • Sound clips matching the images - tap to hear the sound! • Simple, intuitive user interface • All photos/videos native to the app (no data charges), no wifi or data needed to watch videos! We regularly update all our apps with fresh content for our users. Please keep checking the updates tab on the app store in order to make sure you’re enjoying all the latest additions to our application. -= MORE 100 THINGS APPS AVAILABLE =- The entire 100 Things Apps collection of video apps was created by parents of two rambunctious toddlers. All content has therefore been thoroughly evaluated, critiqued and improved upon and received two sticky thumbs up! Check out the other 100 Things Apps including: 100 Diggers, 100 Trains, 100 Farm Animals, 100 Tools, 100 Planes, 100 Matching Games plus more. -= TATTLE ON US =- Please rate and write a review for 100 Things Apps if your toddler loves it as much as ours. For questions, concerns, bug reports, or improvements, please write directly to us via the app's Parents Zone or: Email: [email protected] Facebook.com/100thingsapp YouTube.com/100thingsapp -= REVIEWS =- “The images in this app are just brilliant. I love the close up, detailed pictures of animals like the iguana and seriema. (Who knew about the blue feathers around the eyes)!” Sarah Emerling – Fun Educational Apps
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
axios
react-navigation
expo-av
BUILD KIT DIFFICULTY
Starter
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.
