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.
*** This mobile field guide includes all 871 bird species found in the Guianas covering the countries Suriname, Guyana, and French Guiana
$24.99 · In-app purchases
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 All Birds Guianas: 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 offline access to bird information.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: High price point compared to similar apps.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of community features for bird watchers.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: No interactive features like quizzes or challenges.
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.
*** This mobile field guide includes all 871 bird species found in the Guianas covering the countries Suriname, Guyana, and French Guiana. This makes this app the one and only to date bird guide to this region! The content is derived from Bloomsbury's Helm Guide "Birds of Northern South America". Covering 871 species with 3,100 superb illustrations and 2,000 songs and calls. All distinct plumages including all variations and subspecies are illustrated. *** *** Ornithomedia writes: "Ergonomie agréable et claire" *** The app is based on the renowned two volume reference work by Robin Restall, Clemencia Rodner, and Miguel Lentino. The creation of apps from the book is a co-production between Bloomsbury Plc and Sunbird Images. With over half a million downloads and over 100 apps published to date Sunbird Images became the true market leader in mobile field guides in recent years. SUNBIRD apps have been featured over 300 times by Apple in different countries, and appeared in many magazines, newspapers such as the Times, the Telegraph and described as "incredibly useful" by ITV's Seth Convey and "lovely" by Adam Vaughan of the Guardian. This app is part of the Sunbird Images BLUE LABEL series. Our BLUE LABEL series are top notch digital field guides which provide the most comprehensive data available for a region or taxon. They stand for completeness including even the very rare species and vagrants which have only been recorded once in a region. Even the rare species are illustrated and described in detail featured with a full species account. FEATURES: - Includes all 871 bird species of the Guianas occuring in Suriname, Guyana and French Guiana - Select species of each country seperately - 3,100 illustrations show all subspecies + geographic, age and sex variants - Most advanced Compare Mode of any bird app - compare up to 16 species images / songs / maps - 2,000 bird songs and calls - Sonograms of all songs + details where songs were recorded - Detailed distribution maps of Northern South America down to subspecies level - Introduction contains hints and links on bird watching in the Guianas - Create sighting lists and sort by place, date, group, and name - Automatically plots all birds on a map via GPS (editable) - Make notes for each bird spotted - A simple id key makes species identification easy - Sort and display species: A–Z, 6 different languages, taxonomically Choose between 6 bird name languages: English, Latin, Spanish, French, Dutch, German Narrow species down by foot colour, bill shape, tail length etc. leading to the bird searched for plus a choice of similar species. You can also look for fragments of a species name – the search for “finch“ shows all the species which include the word “finch“ in the species’ name. ***A graphically well-designed layout – easy to use with large lettering.*** Once downloaded no internet connection needed – just download the app and start birding! The app will be continuously developed further. All updates are free of charge. Visit our internet support site for more information www.sunbird.tv. We are happy, if you like our app. Please don't hesitate to email us if you have any questions or suggestions or comments at: [email protected]
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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.