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.
Your books, on a shelf
Free
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.
Your first Build Kit is free with a verified email.
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 Booktrace: Bookshelf & TBR: map the core Books 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.
Your books, on a shelf. Track every book you read or listen to, plan your TBR, and watch your reading year fill in. Booktrace works for print books, ebooks and audiobooks. Add a book, say what format it is, and start a session. For a paperback or an ebook you say which page you're on and Booktrace counts the pages down; an audiobook moves forward by the minutes you listened. Booktrace keeps the time either way. YOUR BOOKSHELF Take one photo of a row on your real shelf and every spine stands on a shelf inside the app, or scan books one at a time. Lean them, stack them, drag them into place, and add a plant, a lamp, or a photo. A bookshelf that looks like yours, because it is. YOUR TBR, SORTED Flip through your want-to-read pile like a crate of records, or let Pick one choose your next book when you can't decide. Browse your whole collection as a wall of covers, and see your history as a calendar of book covers. A SESSION DIAL YOU CAN GLANCE AT Start a session with one tap. A dial you can read from across the room keeps you oriented, and the same information follows you to your lock screen and Dynamic Island. Forgot to start it? Log the session after the fact. WHERE YOU READ If you read on the move, Booktrace can keep a map of the route, so you can revisit the walk that got you through chapter twelve. ASK WITHOUT SPOILERS The built-in chat only knows what you've read so far, so you can ask about a character, recap what happened, or catch back up after a break with zero risk of finding out what's next. STATS THAT ADD UP Streaks, sessions, hours, pages, and goals, with a calendar that fills in as you go. Every book you finish stands on its own shelf. MADE FOR AUDIOBOOKS TOO Narrator credits and ratings, real listening hours, playback speed, and duration bars that show how long each audiobook really is, so a 30-hour epic looks like one. BRING YOUR LIBRARY WITH YOU Import a Goodreads or Libby export in one go. Shelves, ratings, finish dates, formats, and page counts come along. - Scan a whole shelf in one photo - Your TBR in a crate, and Pick one for your next read - Print, ebooks, and audiobooks, tracked in one place, by page or by minute - Spoiler-aware chat that stops exactly where you are - A session dial built for a glance, on your lock screen too - Streaks, goals, sessions, and a reading calendar - Home Screen widgets and Siri Shortcuts SUBSCRIPTION Booktrace is available as a weekly subscription at $4.99 per week or a yearly subscription at $49.99 per year. A one-time Lifetime purchase is also available for $79.99. Some plans include a free trial; its length is shown before you confirm. Prices are in US dollars and may vary by region. Payment is charged to your Apple Account at confirmation of purchase. A subscription renews automatically unless it is cancelled at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours of the end of that period. You can manage and cancel your subscription in your Apple Account settings after purchase. Any unused portion of a free trial is forfeited when a subscription is purchased. Terms of Use: https://booktrace.app/terms.html Privacy Policy: https://booktrace.app/privacy.html
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: Limited book discovery features
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No social sharing options
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Absence of reading statistics tracking
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of offline access to books
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.
Not assessed in a Build Kit yet.
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.