App Overview

Astral - Harrius & Kerstein icon

Astral - Harrius & Kerstein

Marc Kerstein · Entertainment

Astral lets you force anything and produce any small object from your phone.

$59.99 · In-app purchases

PRICE
$59.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
5.0
14 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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Combine features and design from your favorite apps.

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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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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 Astral - Harrius & Kerstein: map the core Entertainment 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

Introduce more diverse celestial themes and content types.

Assumption to check: Limited content variety can lead to user fatigue.

Validate with people who use this workflow before building.

Hypothesis 2

Offer limited free content or lower-tier subscriptions.

Assumption to check: High subscription cost may deter potential users.

Validate with people who use this workflow before building.

Hypothesis 3

Implement personalized content suggestions based on viewing habits.

Assumption to check: Lack of personalization features for content recommendations.

Validate with people who use this workflow before building.

Hypothesis 4

Enhance offline capabilities for downloaded content.

Assumption to check: Offline viewing options are limited.

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

Astral lets you force anything and produce any small object from your phone. Created by Henry Harrius and Marc Kerstein, Astral includes *two* effects: the best way to force anything, and the best way to produce an object. These are even better when combined together. Unlike other object production effects, using Astral's force mode lets your spectator seemingly decide upon which object will be used, making the object's production seem even more impossible. Force anything: Astral uses a carefully developed forcing mechanism that feels totally natural, whilst ensuring the screen always remains in view. Make something appear: Whether you drag it or time it, Astral lets you make any small object appear in whichever way works best for you. Astral includes advanced but easy-to-use features, such as: * Advanced AI Cutting-edge AI automatically extracts any small object from a photo, making Astral super easy to use. * Quick Produce Mode Found a small item that would be perfect to produce? Astral's "Quick Produce Mode" combined with its AI image extraction ensures that you're ready to perform in no time. * Two Effects, One App Astral gives you the fairest selection process with the cleanest production. Combining these gives the feeling that *any* object could have been produced. And more... - Create and store multiple presets to customise your performance. - Force any object in a natural way before production. - Store separate force and production images the object. This app is for entertainment purposes only.

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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.