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.
"...anyone grappling with the sort of evil cryptics with no black squares will appreciate its power." - The Sunday Times
$4.99
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 Advanced Crossword Solver: map the core Reference 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 clue database
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: No community features
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Static answers without explanations
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No offline functionality
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.
"...anyone grappling with the sort of evil cryptics with no black squares will appreciate its power." - The Sunday Times The Advanced Crossword Solver is a combination of a powerful regular expression-style word matcher and a user-customisable database of nearly 300,000 words and phrases. It is specifically designed to help with solving advanced thematic crosswords such as The Times’ Listener and The Sunday Telegraph’s Enigmatic Variations, but is also useful for word games such as Scrabble and Boggle, and indeed for any other word puzzles or games, for logic problems and as an aid to crossword setting. Unlike most crossword solving programs, this is far more than a simple pattern matcher for unknown letters. It can be used as a pattern matcher, and can solve simple anagrams, but in addition, some of its more powerful features include: • search for a combined pattern and anagram, when you know the answer is an anagram, and you also know where some of the letters are. • search with wildcards, when you know that an answer includes a particular letter or string of letters, but not where in the word they are. • solve partial anagrams, when you know that some of the letters of an answer are an anagram, but other letters are unknown. • solve subset anagrams, when you want to find the longest word you can make from a given set of letters. • search with multiple possibilities for letters, when you know a letter is one of a few possibilities, but not which one it is. • search with letter variables, when you know that several letters are the same, but not which letter it is. • search with vowel and consonant symbols, when you know that a letter is either a vowel or a consonant, but not which letter it is. • search for all the words which are one misprinted letter away from another word. • search for words which match a given pattern but which have one or more misprinted letters. • search for pairs of words (across and down) which cross at an unknown letter. Using the simple input syntax, complex combinations of the above can be searched to quickly narrow down to a solution. Even the most complex search takes no more than a few seconds, and results are clearly presented in a scrollable list. Tapping on a result from the solver shows a menu which allows the result to be looked up in a choice of iPhone dictionary and thesaurus applications, including Chambers and WordWeb, or online. This menu can be customised to add your own choice of applications and websites. (Note that in order to link to a dictionary, it must offer a URL that can be used by other apps - check with the publisher of your chosen dictionary that this is the case.) The word list used by the Solver is a combination of the UK Advanced Cryptics Dictionary (UKACD) and the Enhanced North American Benchmark LExicon (ENABLE). The UKACD is compiled by a crossword puzzle enthusiast from the words and phrases that are found in typical British advanced cryptic puzzles. ENABLE is an authoritative list of Scrabble words valid in both US and UK games. Between the two lists, the program searches a database of over 298,000 words and phrases. The word list used by the solver is stored as plain text files, and the files can be accessed via iTunes to allow them to be customised to your own requirements - words can be added or removed, or the entire word list can be replaced if desired. In addition, the symbols used to denote the input syntax can also be changed, making the entire operation of the solver customisable to your own requirements. If your taste in puzzles extends to the truly challenging, this is the application for you.
Written user reviews are not shown here. Check current App Store reviews >
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.