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.
TruCal is a calorie and macro tracker built around one principle: your data stays on your phone.
$1.99
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.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for TruCal – Calorie Tracker: map the core Health & Fitness workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
TruCal is a calorie and macro tracker built around one principle: your data stays on your phone. No account required. No subscription. No server ever sees your food log. Everything is stored locally, backed up and restored by you, on your terms. Daily Tracking Log breakfast, lunch, dinner, and snacks with a searchable database of whole foods. Add items by weight, edit entries, and swipe to delete. Navigate any day — past or present — and backlog meals you forgot to record. Smart Daily Coaching TruCal reads the time of day and tells you where you stand against your calorie curve — not just a number, but context. Running low? Ahead of pace? It nudges you toward protein targets too. Barcode Scanner Scan packaged foods to pull nutrition data automatically. Scanned items save to your personal food library for fast re-use. Saved Meals & Recipes Build recipes from any foods in the database, then add them to any meal with a single tap. Perfect for meals you repeat. My Foods Library Create custom foods with your own nutrition data. Scan, create, and manage a personal library that appears everywhere you search. Macro Tracking Set your own protein, carbs, and fat targets. Animated progress rings and bars show your daily split at a glance. Insights 7-day calorie and protein trends, logging streak, average intake, and best/worst day against your goal. Includes a kJ-to-kcal converter and macro-to-calorie calculator. Metric & Imperial Full support for kg/cm and lbs/inches. Optional oz equivalents shown alongside grams when using Imperial. Export & Import Back up your entire food log as a JSON file. Restore it any time. TruCal never uploads anything anywhere.
Written user reviews are not shown here. Check current App Store reviews >
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
Assumption to check: Users often find calorie tracking tedious and time-consuming.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited food database can lead to missing items.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Users lack motivation to stick with tracking.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: User experience can feel overwhelming with too many options.
Validate with people who use this workflow before building.
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.