App Overview

BiorhythmΩ icon

BiorhythmΩ

Jeonghwan Kim · Lifestyle

◉ Protect yourself by checking biorhythm daily.

$0.99 · In-app purchases

PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
4.7
498 ratings · Top 15%

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

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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/
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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 BiorhythmΩ: map the core Lifestyle 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

Provide educational content and tips on interpreting biorhythm data.

Assumption to check: Users find it hard to understand the significance of biorhythms.

Validate with people who use this workflow before building.

Hypothesis 2

Allow users to customize charts and notifications.

Assumption to check: Lack of personalization options.

Validate with people who use this workflow before building.

Hypothesis 3

Simplify the purchase process and clarify the benefits of premium features.

Assumption to check: In-app purchases can be confusing.

Validate with people who use this workflow before building.

Hypothesis 4

Integrate with popular health tracking apps for better user experience.

Assumption to check: Limited integration with other health apps.

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

◉ Protect yourself by checking biorhythm daily. Stamina, judgment, emotion, etc. If you are not feeling well about the following measures, how about checking your biorhythm? If your biorhythm does not function appropriately, it is recommended to avoid unreasonable activities. Something might you don't want to happen. Biorhythm can be referenced in all areas of your life such as learning, sports and sales. ◉ It will advise your future. Suddenly, some of the celebrities faced traumas The cases showed that their biorhythms weren't good. Was it a coincidence? ◉ What is biorhythm? Biorhythm is the physiological cycle of a physical, emotional, and Intellectual. These three cycles are repeated in a uniform pattern based on your birthdays, and there is a difference in activity efficiency or ability depending on the combination of these patterns. The four rhythm cycles and calculations are as follows. d = number of days of living Physical rhythm: sin (2π d / 23) Emotional rhythm: sin (2π d / 28) Intellectual rhythm: sin (2π d / 33) Intuitive rhythm: sin (2π d / 38) Each rhythm has a value from -100 to +100, and this value indicates the status. Low stage: -100 to -1 High stage: +1 to +100 Dangerous Days: 0 (at the time of transition from + value to - value or from - value to + value) ◉ Explanation of Application function [Biorhythm] • Display the four rhythms of a user as values and graphs • Change dates easily to view biorhythms on multiple dates • Connect with analysis function [User] • Integrated management of multiple users' biorhythms • Connect to the biorhythm graph screen [Analysis] • List biorhythms of 31 days • Extracting dates for state classification • Performance analysis by biorhythm [Union] • Calculate the average of two or more users' biorhythms [Share] • Send biorhythm using messages or email [Information] • Summary of usage • Help • Contact the developer ◉ It is not a simple graph. • Accurate data using formal algorithms • Sophisticated and easy-to-see graphs • Send biorhythm using messages or email • Biorhythm integration management of multiple people • Additional features different from other biorhythm apps • Easy to use at anywhere, at anytime • Preview of future biorhythms ◉ Notification • If you have any questions, please use the email function on the app.

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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
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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.