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
KnowLimit: Drink Journal
KnowLimit is a clean, private drink journal for adults
$1.99 · In-app purchases
PRICE
$1.99
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.
Build your own version
Build Kit
Make this idea yours
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Add to a Remix
Combine features and design from your favorite apps.
Kit ready. Verify your email to download it.
Generating… usually about a minute.
Make it yours Optional
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.
JavaScript is required to complete mailbox verification.
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 KnowLimit: Drink Journal: map the core Lifestyle workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
Preview ready. Verify your email to reveal and copy the full prompt.
JavaScript is required to complete mailbox verification. Return to this prompt preview.
Continue in Rork >
Affiliate link: CloneChart may earn a commission at no extra cost
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
Incorporate reminders or notifications to encourage logging.
Assumption to check: Users often forget to log their drinks regularly.
Validate with people who use this workflow before building.
Hypothesis 2
Provide more comprehensive graphs and personalized insights.
Assumption to check: Limited insights and visualizations on consumption data.
Validate with people who use this workflow before building.
Hypothesis 3
Simplify the process to edit or delete entries.
Assumption to check: Difficulty in editing or deleting entries once logged.
Validate with people who use this workflow before building.
Hypothesis 4
Add sharing options to allow users to share their progress with friends.
Assumption to check: Lack of social sharing features.
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
KnowLimit is a clean, private drink journal for adults. Log a beer, wine, cocktail, or custom pour in two taps, see your day come together as a standard-drinks count, and review how your week is shaping up. No accounts. No ads. No tracking. Your log stays on your device. LOG IN SECONDS Beer, wine, liquor, cocktails, and custom pours. Save your usuals. Adjust the time if you are logging a drink after the fact. SEE YOUR PATTERN A clean Today screen shows your drink count and standard-drinks total for the day, plus a session-length timer. Each drink is converted to standard drinks using the National Institute on Alcohol Abuse and Alcoholism (NIAAA) definition of one standard drink as 14 g of pure alcohol, so beers, wines, and cocktails compare on the same scale. APPLE WATCH COMPANION A real watchOS 10 app with quick-add buttons for your top drink types and a glance view of your current day's count. Syncs automatically with your iPhone. LIVE ACTIVITY AND LOCK SCREEN Live Activities and Dynamic Island keep your drink count visible without unlocking. Home Screen, Lock Screen, and Smart Stack widgets show your count at a glance. HANDS-FREE WITH SIRI Four built-in Siri Shortcuts: log a drink, log water, ask how many drinks you have logged today, and ask when you last logged a drink. A RIDE HOME, ONE TAP AWAY One tap to open Uber, one tap to open Lyft, one tap to call your saved emergency contact. Your location is never tracked, stored, or shared. APPLE HEALTH Optional Apple Health write of your standard-drinks count using the Apple-sanctioned Number of Alcoholic Beverages data type. Nothing else is shared with Health. PRIVACY FIRST No account. No sign-in. No third-party SDKs. No advertising. No tracking. Your log lives in Apple's SwiftData on your device and only leaves if you export it yourself. IMPORTANT KnowLimit is for adults of legal drinking age in your jurisdiction. It is a personal awareness journal, not medical advice. If you are concerned about your drinking, please speak with a healthcare provider or contact SAMHSA's National Helpline at 1-800-662-4357
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
< Scroll to see more >
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
Victory Native
@react-native-community/datetimepicker
React Navigation
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.
