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
Happy Bob
Feel better about your diabetes!
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
916 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's included18 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 Happy Bob: 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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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
Add more mood options and customizable entries
Assumption to check: Limited mood tracking options
Validate with people who use this workflow before building.
Hypothesis 2
Incorporate community support features for users
Assumption to check: Lack of community features
Validate with people who use this workflow before building.
Hypothesis 3
Implement reminders for users to log their mood daily
Assumption to check: No reminders for daily logging
Validate with people who use this workflow before building.
Hypothesis 4
Simplify in-app purchases and provide clear value propositions
Assumption to check: In-app purchase confusion
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
Feel better about your diabetes! Happy Bob is your personal digital health companion that connects with your continuous glucose monitor and turns your diabetes data into motivating, friendly, and fun experiences — helping you stay in range while reducing the stress of daily diabetes management. Designed by people with diabetes, Happy Bob helps you feel like a person, not a patient. Supported Data Sources • Dexcom G6, Dexcom G7, and Dexcom ONE+ → Real-time glucose updates delivered instantly through Happy Bob. • FreeStyle Libre 1, 2, 3, and 3+ (U.S. only) → Data available with a slight delay and intended for wellness purposes only. When used with Abbott’s Continuous Glucose Monitoring Systems, Happy Bob is intended for non-medical use for wellness purposes only. The information displayed is for reference and you must use your Abbott CGM reader or display device for diabetes management decisions. Why Happy Bob? • Glucose tracking made fun: Your values come with humorous, personalized messages that reduce data anxiety. • Motivating goals: Set a star target and collect stars for every in-range reading. • Community support: Create a group with your diabuddies, share data, and cheer each other on. • Apple Health integration: Sync steps and activity for a more complete view of your day. • Apple Watch compatibility: Check glucose at a glance—plus a smile from Bob. • Dexcom real-time compatible and supportive of FreeStyle Libre (wellness-only). New Features • Monthly Challenges Stay motivated with monthly glucose and activity challenges designed to help you build healthy habits one month at a time. • Happy Mom — Support for Pregnancy & Diabetes A dedicated experience supporting people who are pregnant or planning pregnancy while managing Type 1, Type 2, or gestational diabetes. Available with Premium Subscription. Happy Bob Premium – Try Free for 7 Days! Free version of Happy Bob can be used to connect to CGMs and view basic glucose data. To unlock the full experience upgrade to Premium version: •Multiple funny moods — each with a unique character and tone of voice that reacts to your glucose values. (including fan-favorite Snarky Bob) • In-app glucose & activity statistics • Dashboard for simplified data insights What our users are saying: “Happy Bob helps take the stress out of daily diabetes management.” “I’ve been a Type 1 diabetic for 35 years—never has trying to keep my blood sugars in range been so much fun!” “My 9-year-old LOVES Snarky Bob! She loves trying to earn stars.” “Best thing ever since they invented CGMs.” “He is always there to remind you of your numbers.” Who is Happy Bob for? • People with Type 1, Type 2, Gestational, or Prediabetes • Caregivers • Healthcare providers – Supports data sharing between patients and care teams for improved remote engagement. • Diabetes advocacy organizations Subscription Free 7-day trial with Premium subscription. Monthly and yearly plans available. Pricing varies by region. Manage auto-renewal in iTunes Account Settings. About Happy Bob Built by people with diabetes, for people with diabetes. Our mission is to support you in feeling like a person—not just a patient—every step of the way. Note: The data displayed in this app is for informational purposes only and should not be used for medical decisions. FreeStyle Libre data is intended for non-medical wellness use and may be delayed. Terms of Use: https://happybob.app/terms-of-use Privacy Policy: https://happybob.app/privacy-policy
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
Supabase
Victory
React Navigation
zustand
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.
