App Overview

Komi Reader - TXT & PDF icon

Komi Reader - TXT & PDF

kim juyoung · Books

Text files and images contained in compressed files

$3.99 · In-app purchases

PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
4.8
194 ratings · Top 5%

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.

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What's included18 files

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

  • START_HERE
  • AGENTS
  • EVIDENCE
  • SPEC
  • BUILD_PLAN
  • DIFFERENTIATION
  • skills/
  • screens/
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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.

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> SELECT BUILD PLATFORM:

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

// RORK SYSTEM PROMPT
Rork plan preview for Komi Reader - TXT & PDF: map the core Books workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
            

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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 support for more formats like EPUB and DOCX.

Assumption to check: Limited file format support beyond TXT and PDF

Validate with people who use this workflow before building.

Hypothesis 2

Implement a more streamlined design with better organization.

Assumption to check: User interface can be cluttered

Validate with people who use this workflow before building.

Hypothesis 3

Simplify the subscription process with clearer options and guidance.

Assumption to check: In-app purchase process can be confusing

Validate with people who use this workflow before building.

Hypothesis 4

Introduce cloud sync options for document access on multiple devices.

Assumption to check: Lack of cloud sync

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

Text files and images contained in compressed files Apps that all can see in one app Also supports PDF Put text and zipped files in your app Apps that can be viewed in one app See comics and novels in one app. iPhone, iPad, Mac (Apple Silicon) support * Some functions may not be supported on Mac Previously integrated Komi Viewer and Text Viewer app. You can also try using the Komi Viewer or Text Viewer in the App Store before purchasing the app. ** Characteristic ** - You can view the text file and the image included in the compressed file. - zip, rar, 7z, cbz, cbr, cb7 compressed files are supported (png, jpeg, jpg, gif, bmp, tif, tiff, webp, jxl, heif extension images are included) - Support for locked files (zip, rar, 7z, pdf) - PDF file - TIF/TIFF file - ePub file , only text in ePub to display the same (with the same function) as the existing txt file. (No media such as audio, no chapter function) - both landscape and portrait - iPad multitasking - iPhone, iPad, Mac(Apple Silicon) - Upload via PC web browser (WIFI) - Import of files from iCloud, Dropbox, One Drive, Box, and other cloud apps (cbr, cbz, cb7 are not supported in the cloud service, please upload in other ways.) - FTP/SFTP support (FTPS not supported) - Upload files to iTunes file share - Text font, color, left margin, background can be changed - Show status bar - App lock, file lock - Image/PDF Night Mode: Invert Color / Image Brightness (1 ~ 3 steps) - Screen off option: When set to ON, the screen automatically turns off at the time the device turns off. - Last file view, On / Off in setting - Bluetooth keyboard: Supports page switching and screen closing function, direction key (asdw) page switch, ESC key viewer screen close - Pad text file viewer "Two-page view" support: left-right, right-left page orientation can also be selected, please adjust the page interval to "left and right margin" value. - Text file autoscrolling: Text files can now be autoranged vertically (down). Sets the total amount of time a page goes from 1 second (fast) to 30 seconds (slow) Now you do not have to manually scroll the text file. - Vertical scrolling added: Vertical scrolling can be dragged by the user. You can change it in the setting screen. The existing "vertical touch" does not work. - Image next page Zoom-in keep-alive function: Apply the previous book's zoom-in status in the following book. Please change your settings. - Next book auto-switching options: If you automatically change the next book switching option in Settings, tabs on the last page will automatically switch to the next book. (Default manual) - Image / PDF Automatic page turnover and auto scroll: Automatically flips to the next page after a certain amount of time. If it is zoomed in, it will automatically scroll down. Speed settable (in-app purchase required) - Text file underline function: 3 kinds of underline can be selected, and underlining transparency can be set on iOS 11 or higher - A function that changes to the next page when the volume is changed. (The sound size will change as well. Please be careful. ON / OFF in setting.) - Convert copied text to clipboard into txt file - iCloud Sync : Synchronize the information (read location) of the read file and open the same file on another device (signed in with the same iCloud account) so that you can see it again. (The bookmark information in the text file is also synchronized.) (iOS 11+) - Font file (ttf, otf) registration: After adding the file, you can register by clicking the file in the app. You can enable it in the "Font - Type" item of the setting. - Blink: Recognizes eye blinks to switch pages (iPhone only, iOS 18+) - Automatic Image Crop: Automatically crops the empty space on all four sides of images with a white background. (iOS 16+) - Content Color: Changes and unifies the content (pictures or text) within the image to a single color Please send bugs or suggestions to [email protected] at the top right of the setting screen.

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Screenshots

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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.

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BUILD KIT DIFFICULTY
Advanced

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.