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.
Whaile — yes, like the whale
$24.99
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 Whaile: Large File Log Viewer: map the core Developer Tools 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: Expensive subscription
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Missing features
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Poor performance
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.
Whaile — yes, like the whale. It swallows files whole: the multi-gigabyte text and log files that crash TextEdit and choke VS Code open in about a second, the ones you'd normally only dare to touch from the terminal. Built native for Mac and iPad, Whaile memory-maps the file instead of loading it into RAM, so an 8 GB log opens instantly and scrolls without a single dropped frame. No spinner. No "file too large." No waiting. WHY WHAILE • Open huge files fast — 1 GB, 8 GB, or bigger, ready in seconds • Smooth, native scrolling with zero lag, even at the end of a billion-line file • Search the whole file in seconds, not minutes • Jump straight to any line number, instantly • Tiny memory footprint — the system pages data in and out, your RAM stays free • Fully sandboxed and offline — your files never leave your device BUILT FOR • SREs and platform engineers triaging giant nginx, syslog and crash logs • Data engineers spot-checking 2 GB JSONL, NDJSON and CSV dumps before the real pipeline • Anyone handed a log or export far too big for a normal editor LET YOUR AI READ THE FILE Whaile works with a free, open-source companion MCP server, so AI assistants like Claude can search and read your huge files directly — without blowing past the context window. Point your agent at a 10 GB incident log and ask it what went wrong, instead of scrolling by hand. FAST BECAUSE OF HOW IT'S BUILT • Memory-mapped file access — no full load, no copy • Sparse line index built in the background for instant jump-to-line • Byte-level search tuned for files that don't fit in memory Whaile is a read-only viewer, on purpose: it's the fastest way to open, read, and search a file that's simply too big for everything else.
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.