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.
Most apps flatten what you draw into pixels the moment you lift the Pencil
$12.99
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.
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.
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Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Most apps flatten what you draw into pixels the moment you lift the Pencil. Rindraw doesn't. Every stroke stays a stroke: recolor it next week, bend it, scale it up, and it stays sharp, because Rindraw draws it again instead of stretching it. Your history stays too. Quit, come back days later, and undo still goes back. And it's yours in plainer ways: you pay once for iPad, iPhone and Mac, each drawing is a file you can see in Files, there's no account, and your drawings never come to us. PAY ONCE One purchase covers iPad, iPhone and Mac. There's no subscription and no account, your drawings and who you are never come to us, and an update never changes how your tools work unless you say so. YOUR FILES Each drawing is a file, kept on your device, in iCloud Drive so every device has the same library, or in a folder you choose in Files. Your undo history is saved in the file, so you can undo after quitting. Deleted drawings stay in Recently Deleted for 30 days. EDITABLE STROKES Rindraw saves every stroke as you drew it, not as pixels. Recolor or restyle a stroke later, and move, rotate, scale, distort or warp your art without it going soft, because Rindraw redraws the strokes instead of stretching pixels. BRUSHES Ink, pencil, graphite, marker, chalk, dry brush, spatter, airbrush and more, with paper grain, textured tips, and Apple Pencil pressure, tilt and barrel roll. Wet paint, pigment mixing and a mixer brush blend color on the canvas, and a blending brush can pick up color from the layers below. Edit any brush in the Brush Editor, save your own, and import brushes from Procreate and Photoshop. STEADY LINES A lazy string, stroke stabilization and motion filtering smooth your lines as you draw. A line never moves once it's on the canvas. LAYERS Groups, blend modes, clipping, masks, adjustment layers and live filters, all editable at any time. Rindraw opens Procreate and Photoshop files with their layers, and exports PSD with the layers kept. ANIMATION AND 3D Animate frame by frame, on tracks of frames that play at once along a timeline, with onion skins and sound. Keyframes move, scale, fade, blur and recolor a track, eased in or out, or you can perform the moves live while it plays. Add video, record your voice, and export animated GIF, animated PNG, HEVC or ProRes video, or a picture for each frame. You can also paint on 3D models in OBJ and USDZ and light them with up to four lights. PAGES Lay out frames on one canvas for comics, storyboards, zines or portfolios, and export a PDF with a page per frame. AND MORE • Timelapse replay of every drawing, exportable as video • A History panel with snapshots, to go back to any earlier step • A Quick Menu with six actions you choose • Your own keyboard shortcuts, and game controller buttons • Stacks you can lock with Face ID • Export as PNG, JPEG, HEIC, JPEG XL or 16-bit TIFF, with Display P3 color in HEIC and TIFF, and CMYK for print Rindraw is made by Sawir Studio, an independent studio.
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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.
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.