App Overview

amma: Pregnancy & Baby Tracker icon

amma: Pregnancy & Baby Tracker

PERIOD TRACKER & PREGNANCY AND BABY CALENDAR LIMITED · Medical

Pregnant? Get this free app to track how your baby grows.

Free · In-app purchases

PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
10,175 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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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/
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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.

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.

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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> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
Rork plan preview for amma: Pregnancy & Baby Tracker: 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

Pregnant? Get this free app to track how your baby grows. Planning a baby? We're here for you, too! Or maybe your baby has already been born - then we have a special mode for that special day and many more to come! amma Pregnancy Calendar is an indispensable tool for the expectant mother! Get detailed information on the development of your baby at each week of pregnancy. Hundreds of thousands of women choose this application. Join us! With amma Pregnancy Calendar you can easily: - Planning a baby with our period tracker - Check your ovulation easily - Get DAILY pregnancy info - Track your pregnancy week by week for 9 months - Get updates on the baby's size and development weekly - Get information on changes in your body flo - Manage weight and belly growth gain goals with clinical guidelines for your BMI - Track contractions and send results to a medic through the Contraction Timer - Pregnancy + Weight log - Track baby kicks with the Kick Counter - Discover more information each week - Share through Facebook, Email, Text, and Twitter - Personal Diary - Pregnancy + week by week info and much more! Every woman expecting a child prepares herself to give birth to her baby and, of course, she wants to know how her baby grows, what happens to the body and what other changes are waiting for her before the birth of the baby. In this application, you’ll find the detailed weekly pregnancy calendar giving easy access to information about the pregnancy and the baby development, changes in pregnant woman's body, as well as tips on nutrition for pregnant women. For each week of pregnancy, there are four pieces of information: • Baby development, • Mother’s body, • Mom’s meals, • Useful tips. To use the pregnancy calendar and to track your pregnancy due date, just enter the day of your last period and you'll see and you'll see information about the duration of your gestation Why not enhance your pregnancy and parenthood with a bit of technology? amma is a digital expectant mother's guide into week-by-week pregnancy calculation, fetal development, contractions and labor. amma embraces the baby and mom connection and gives you an overview of every important detail. Count the kicks, contractions and more to stay on top of the process. And we have your own personal AI assistant! Our Ammy is your girl: if you get overwhelmed with all this new information, you can always ask her about pregnancy! Share your pregnancy information not only on social media, but also with your partner! Our new Partner Mode gives you the opportunity to get even closer to your loved ones on this journey: just share the Partner Code with them and learn about your pregnancy and baby together! This App is not intended for medical use, or to replace the advice of a trained medical doctor. If you have any concerns about your pregnancy, consult with your doctor or midwife.

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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

Enhance community features with better interaction options.

Assumption to check: Limited community engagement features compared to other apps.

Validate with people who use this workflow before building.

Hypothesis 2

Clarify free vs. premium features during onboarding.

Assumption to check: In-app purchases may confuse users about what is included for free.

Validate with people who use this workflow before building.

Hypothesis 3

Provide customizable tracking categories for users.

Assumption to check: Lack of customization for tracking options.

Validate with people who use this workflow before building.

Hypothesis 4

Implement a help section with FAQs and support chat.

Assumption to check: User support is not easily accessible.

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
TypeScript
React Navigation
Zustand
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.