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.
App Overview
Homecoming for Mastodon
Homecoming for Mastodon is a Safari extension that makes it easy to open Mastodon pages in different instances.
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
5 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 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.
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
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Homecoming for Mastodon: map the core Social Networking 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
Incorporate interactive features like polls, quizzes, and events.
Assumption to check: Limited user engagement features compared to larger platforms
Validate with people who use this workflow before building.
Hypothesis 2
Enhance search and explore functionalities with personalized suggestions.
Assumption to check: Difficulty in discovering new users and content
Validate with people who use this workflow before building.
Hypothesis 3
Implement advanced filtering and grouping options for notifications.
Assumption to check: Managing notifications can become overwhelming
Validate with people who use this workflow before building.
Hypothesis 4
Allow more media types and sizes, including GIFs and longer videos.
Assumption to check: Limited media upload options
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
Homecoming for Mastodon is a Safari extension that makes it easy to open Mastodon pages in different instances. Just click the extension icon in the Safari toolbar to open a Mastodon page from another instance in your own instance. This makes it a lot easier to follow new accounts on Mastodon! You can also go in the reverse direction: click the toolbar icon to switch from your own instance to the page's original instance! These features work with both profiles and posts. Homecoming for Mastodon is a Universal Purchase for iOS and macOS. Made by indie developer Jeff Johnson. If you need support, please email me at [email protected] or visit the support site: https://underpassapp.com/homecoming/support.html To set up Homecoming for Mastodon, just enable the extension in Safari, click the extension icon in the toolbar, enter your Mastodon instance, and save.
Written user reviews are not shown here. Check current App Store reviews >
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
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BUILD KIT DIFFICULTY
Starter
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.
