App Overview

Sunrise Sunset Widget icon

Sunrise Sunset Widget

Bjorn Jenssen · Weather

Sunrise Sunset Widget is a beautiful Sun Tracker and Weather app that lets you explore the daily and seasonal cycles of the Sun in a stunning, interactive way.

Free · In-app purchases

PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
4.8
1,342 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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Build Kit

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

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What's included17 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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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 Sunrise Sunset Widget: map the core Weather 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

Allow users to customize the display format and colors.

Assumption to check: Limited customization for sunrise/sunset times display

Validate with people who use this workflow before building.

Hypothesis 2

Implement offline caching for locations and times.

Assumption to check: No offline mode

Validate with people who use this workflow before building.

Hypothesis 3

Enable GPS-based location detection for more accuracy.

Assumption to check: Limited location support

Validate with people who use this workflow before building.

Hypothesis 4

Offer an ad-free subscription tier with additional features.

Assumption to check: Ads in free version can be intrusive

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

Sunrise Sunset Widget is a beautiful Sun Tracker and Weather app that lets you explore the daily and seasonal cycles of the Sun in a stunning, interactive way. Spin the solar disk to move through the time of day or up to five days ahead, and instantly see sunrise and sunset times, day length, twilight, golden hour, solar power output, and even the UV Index — all visualized with precision and style. Switch to Weather Mode to view temperature, precipitation, wind speed, and humidity beautifully combined with the solar disk. If you’re into photography, enable Golden Hour and Blue Hour mode to easily see when this perfect light begins and ends. Customize your experience with a wide range of color themes, adjustable display modes, and fully configurable widgets. On the Calendar page, explore sunrise and sunset times for any date of the year, and tap a specific day to reveal more detailed solar information. The Places page lets you change your location instantly — the app works anywhere in the world. Enjoy elegant Home Screen and Lock Screen widgets that keep you updated at a glance with sunrise, sunset, and daylight times right on your device. Get notifications for sunrise and sunset, total day and night length, and see how the day changes compared to yesterday. Whether you’re a photographer, nature enthusiast, or simply love knowing where the Sun is, Sunrise Sunset Widget brings solar and weather insights beautifully to life. --- Information about Sunrsie Sunset Watch Full Access subscription: -At confirmation of purchase, or following the completion of a free-trial period, payment will be charged to your iTunes account. - Yearly subscriptions are available. - Payment will be charged to your iTunes account at confirmation of purchase. - Your subscription will automatically renew unless auto-renew is turned off at least 24-hours before the end of the current subscription period. - Your account will be charged for renewal within 24-hours prior to the end of the current subscription period. Automatic renewals will cost the same price you were originally charged for the subscription. - You can manage your subscriptions and turn off auto-renewal by going to your Account Settings on the App Store after purchase. -Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable Terms of Use: https://uv-index-worldwide.web.app/tos_bjorn_jenssen.html

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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.

SUGGESTED BUILD STACK
React Native
Expo
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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.