App Overview

Japanese Birds icon

Japanese Birds

Enwit Inc. · Reference

This app provides information on 250 species of birds in Japan, complete with photographs, descriptions, and sounds

$28.99 · In-app purchases

PRICE
$28.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet

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.

Build your own version

Build Kit

Make this idea yours

A product spec, screen plans, and build steps for your coding agent.

First kit free with a verified email

Add to a Remix

Combine features and design from your favorite apps.

Kit ready. Verify your email to download it.

What's included16 files

A product spec, phased build plan, differentiation notes, and screen references.

  • START_HERE
  • AGENTS
  • EVIDENCE
  • SPEC
  • BUILD_PLAN
  • DIFFERENTIATION
  • skills/
  • screens/
Preview a sample Build Kit No email needed

Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.

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.

Screen plan

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.

Differentiate and validate

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.

JavaScript is required to complete mailbox verification.

Free quick prompt For a smaller starting point

Quick prompt

> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
Rork plan preview for Japanese Birds: map the core Reference workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
            

Preview ready. Verify your email to reveal and copy the full prompt.

JavaScript is required to complete mailbox verification. Return to this prompt preview.

Continue in Rork copies the full prompt to your clipboard first, then opens Rork in a new tab.

Continue in Rork >

Affiliate link: CloneChart may earn a commission at no extra cost

Opportunities

AI-GENERATED OPPORTUNITY HYPOTHESES

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

Include detailed descriptions, sounds, and native habitats.

Assumption to check: Limited bird information compared to other reference apps

Validate with people who use this workflow before building.

Hypothesis 2

Implement a more streamlined navigation structure.

Assumption to check: Navigation can be cumbersome

Validate with people who use this workflow before building.

Hypothesis 3

Clarify payment options and provide a clear value proposition for premium features.

Assumption to check: In-app purchase confusion

Validate with people who use this workflow before building.

Hypothesis 4

Integrate social sharing and user reviews for species.

Assumption to check: Lack of user community features

Validate with people who use this workflow before building.

App evidence

Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.

App Store description

This app provides information on 250 species of birds in Japan, complete with photographs, descriptions, and sounds. There are 364 sounds—including songs, calls, and drumming. Beautiful birdsong, passionate canzone, the melancholy melody of a love song, intense drumming, birdcall as daily communication—enjoy the diverse world of wild birds. You can look up birds anytime, anywhere with this app installed on your iPhone/iPod touch. No more having to lug heavy guidebooks around. When you encounter a bird, you can listen to its pleasing birdsong, then you can let this app work for you. You can browse by name alphabetically or by family, or search by common name, scientific name, or Japanese name. Japanese name could be convenience when you talk to Japanese bird watcher. e.g. “Red-crowned Crane” is “Tan-cho” in Japanese name. It has also glossary and terminology in Japanese and English. If you do not remember or cannot even guess at part of the bird's name, you can use the search function to search by color, size, habitat, or distribution. You can browse through the quickly returned search results, which are sorted by size. Color or habitat search conditions can be set as a filter as you wish. To play a sound, simply tap on the sound play button or on the phonetic spelling text. Photographs, life descriptions, and phonetic spelling for voices help you to understand birds effortlessly. In addition, you can let the link function work for you so you do not miss similar sounds. You can make your own lists of favorite birds, by season, by site, or in any manner you like. Included are sample lists for Hokkaido(endemic to Hokkaido) and Okinawa(endemic to Okinawa). The player function plays sounds from your own list or by family. You can use it to simply appreciate your favorite sounds, or to train your ear using blind mode. Text size for menus and descriptions can be set to small or large as you wish. This app is bilingual in Japanese and English, allowing you to enjoy international communication through wild birds. The photographs are by Takuya Kanouchi, and the sound recordings and text are by Hideo Ueda. Between them, they have taken a massive number of photographs and recorded many, many sounds over several decades. Now this wealth of information is in your hands, and with this treasured library you can go out into the field of wild birds. Some of the contents of this app were originally published as a book (see left picture). This app includes a glossary and terminology for parts of a bird taken from the book. When you use this app to play sounds outdoors, please use headphones or turn the volume down if using a speaker. Your consideration in not disturbing other birdwatchers is appreciated. ******Update History***** 1.4.1 - Build for iOS 15 - Fixed bugs of display on some devices. 1.3.0 -Fixed corrupted layout in iOS7 -Fixed corrupted layout with using link from SmartBirding -Revise stability of player with play list has large number of sounds. -Fixed some bugs by improved memory management. 1.2.1 -Fixed wrong sort in alphabetic. -Revise message about detecting of mute. -Place name index has link to GoogleMap. 1.2.0 -Support screen size of iPhone 5 and iOS 6. -This version is based on Check-list of Japanese Birds, 7th revised edition by The Ornithological Society of Japan (Preference selects 6th edition or 7th.) -Access to another species of same family in detail screen. -Photos is positioned on horizontal scroll. -Play by speaker mode over mute added. Default mode is not play by speaker if OS set to mute. In field play by speaker is sensitive to another bird watcher and wild birds. -Link to Wikipedia -Link to Smart Birding, movie app. ***************************

Written user reviews are not shown here. Check current App Store reviews >

Screenshots

< Scroll to see more >

Build scope

Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.

Define the first version

Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.

Set boundaries

Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.

Check the hard parts

Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.

SUGGESTED BUILD STACK
React Native
Expo
Supabase
React Navigation
Axios
React Native Paper
BUILD KIT DIFFICULTY
Intermediate

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.