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.
ReadEra - a book reader, allows you to read books for free, text to voice and listen to books for free, offline, in the PDF, EPUB, DOC, DOCX, RTF, MOBI, AZW3, CBZ, CBR, DJVU, FB2, TXT, ODT and CHM formats.
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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 ReadEra – book reader pdf epub: 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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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 support for various file formats
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: UI lacks customization options
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No social features for sharing books
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Inconsistent performance on larger files
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
ReadEra - a book reader, allows you to read books for free, text to voice and listen to books for free, offline, in the PDF, EPUB, DOC, DOCX, RTF, MOBI, AZW3, CBZ, CBR, DJVU, FB2, TXT, ODT and CHM formats. No ads Read books and listen to books without ads. The ReadEra app for reading books and viewing PDF documents neither contains ads nor imposes internal purchases. No registration We’ve made a fast, reliable reader that doesn't compel users to use any specific services. The book reader works offline and is entirely free. Read books for free and listen to books for free (TTS), without limits! Text to Speech (TTS) Read text aloud with voice (TTS) – allows you to read text aloud and listen to all your books, PDF files and documents for free. With the Text to Speech (TTS) function, all your books and documents turn into audiobooks at the tap of the "Read aloud" button. TTS turns your book library into a personal audio library, making reading more flexible and enjoyable. This is especially useful for those who prefer the audio format or want to listen to books in situations where reading is impossible. You can read foreign books and at the same time listen to the pronunciation of words and sentences. You can choose a voice, adjust the speech speed, turn on repeating text to voice of the selected text, word or sentence. Listen to books and documents with ReadEra while doing your things – on the go, working out, before bed and even when sleeping. Read books of all formats ReadEra is a set of reading apps in one app, which reads well multiple types of formats: book Epub, Kindle (MOBI, AZW3), Fb2; business PDF, Djvu; office Microsoft Word (DOC, DOCX, RTF), ODT; text TXT and others. Reading books, viewing Microsoft Word documents and PDF files from zip archives. The reader for books, ReadEra, reads all popular formats of books, journals, articles and other documents in one app. Best book manager for your library Auto-detection of books and documents. Grouping books into lists: To Read, Have Read, Favorites. Sorting by name, file format, the last time read, etc. Quickly search for books, PDF files and documents in your library. Navigation through a book Quick access to reading settings, table of contents, your bookmarks, quotes, notes and other eBook options. Navigate through the book using the page index or the progress bar line. Convenient reading settings Auto-saving the current reading page. Comfortable color themes when reading books: day, night, sepia, console. Horizontal or vertical page flipping mode. Brightness and page margins adjustment, including PDF and DjVu. Separate settings for text and graphic formats. Adjustable type font, size, boldness, line spacing and hyphenation for Microsoft Word, Epub, Kindle (Mobi, Azw3), Fb2, TXT and ODT. Zoom in option for reading PDF and Djvu files. Quotes and Notes Create quotes and add notes to text. Highlight text in books, PDF files and documents, add personal notes to the highlighted text. A well-thought-out and simple algorithm for working with quotes and notes. All your quotes and notes in a book are conveniently gathered in one place—in the “About Document” section. Bookmarks Add bookmarks to save your favorite spots in books with a single tap. Just tap the upper-right corner while reading to quickly add a bookmark. All bookmarks for the book are conveniently gathered in one place—in the "About Document" section. Text Translation ReadEra supports integration with the iOS system “Translate” app for seamless text translation. Instantly translate text in books, PDFs, and documents using the built-in translator on your device. Read books and Listen to books easily and for free with ReadEra!
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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.