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
Baby Tracker & Newborn Log
Sprout Baby Tracker, named a 'Best Baby Tracker App' by Consumer Reports, is the all-in-one infant and newborn tracking app trusted by millions of parents
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
31,554 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.
Build your own version
Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included17 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 Baby Tracker & Newborn Log: map the core Medical workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
Sprout Baby Tracker, named a 'Best Baby Tracker App' by Consumer Reports, is the all-in-one infant and newborn tracking app trusted by millions of parents. From your baby's first days and beyond, Sprout makes it easy to log every feeding, sleep, diaper change, and milestone so you can feel confident and stay organized every day. Designed by parents for new parents, Sprout Baby Tracker helps you understand your baby's routines with clear insights, reminders, and easy-to-use tools. FEEDING TRACKER: BOTTLE, BREAST, AND SOLIDS - Log breastfeeding, nursing, bottle-feeding, pumping, and solid foods. - Use timers for nursing, bottles, and pumping. - Track feeding amounts and formula intake. - Monitor feeding history and patterns over time. SLEEP TRACKER: NAPS AND NIGHTTIME SLEEP - Track naps, nighttime sleep, and sleep routines. - Set sleep reminders. - View sleep trends over time. SLEEP FORECAST: PREDICT YOUR BABY'S NEXT NAP - Predicts your baby's next nap, wakeup, and daily sleep rhythm. - Follow wake window guidance from alert time to sleepy cues. - See daily sleep rhythm predictions that update as you track. - Built from 15+ years of real Sprout sleep data. - Get next nap guidance in reminders, widgets, and lock screen. DIAPER TRACKER: REMEMBER WHEN THE LAST DIAPER CHANGE WAS - Log wet and dirty diapers. - Monitor diaper frequency and patterns. - Notice changes in your infant's daily routine. PUMPING TRACKER: STAY ORGANIZED - Log pumping sessions. - Track pumping time and quantity. GROWTH TRACKER: WEIGHT, HEIGHT, AND HEAD CIRCUMFERENCE - Track your baby's growth. - Compare growth with WHO and CDC charts. - View growth trends over time. MILESTONE TRACKER: CAPTURE KEY MOMENTS - Log developmental milestones. - Track motor skills, speech, and social development. - Follow your baby's progress over time. HEALTH AND DOCTOR VISIT TRACKER - Log immunizations, doctor visits, and medications. - Set health reminders. - Keep a complete health history. MOOD TRACKER: UNDERSTAND EMOTIONAL STATES - Log moods. - Track how feeding and sleep relate to your baby's behavior. MULTIPLE CHILD PROFILES: TRACK ALL YOUR KIDS - Manage multiple infant and baby profiles. - Track each child's routines separately. MEMORIES: JOURNAL AND RECORD FIRSTS - Capture special moments and milestones with photos. - Export memories into a beautifully designed keepsake book. FAMILY SHARING: SYNC ACROSS DEVICES - Share tracking with family and caregivers in real time. - Keep every parent and caregiver up to date. APPLE WATCH APP: TRACK ON THE GO - Log feeding, sleep, and diaper changes from your Apple Watch. - Use hands-free tracking with the double tap gesture. - Featured in Apple's WWDC 2024 Keynote. SIRI SHORTCUTS: HANDS-FREE LOGGING - Use Siri to log feeding, sleep, and diaper changes hands-free. INTERACTIVE WIDGETS AND LIVE ACTIVITIES - Start timers from your Home Screen or Lock Screen. - Track feedings and sleep at a glance. - View tracking updates from your Apple Watch. AUTO-RENEWING SUBSCRIPTIONS Payment will be charged to your Apple ID account at confirmation of purchase. Subscription automatically renews unless canceled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings. Terms of Use and Privacy Policy: https://sprout-apps.com/privacy-policy.html
Written user reviews are not shown here. Check current App Store reviews >
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
Implement a reminder feature for logging activities.
Assumption to check: Users find it hard to remember all activities logged.
Validate with people who use this workflow before building.
Hypothesis 2
Add visual graphs and statistics for tracking milestones.
Assumption to check: Limited insights on baby’s growth.
Validate with people who use this workflow before building.
Hypothesis 3
Clarify subscription benefits and enhance trial user experience.
Assumption to check: In-app purchase confusion.
Validate with people who use this workflow before building.
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
Supabase
Zustand
React Navigation
React Native Paper
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.
