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
AnyFont
*** COMPATIBLE WITH WORD, EXCEL AND POWERPOINT FOR IOS ***
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.6
26,157 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.
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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for AnyFont: map the core Utilities 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
Offer a wider variety of fonts and user-generated uploads.
Assumption to check: Limited font options compared to desktop alternatives
Validate with people who use this workflow before building.
Hypothesis 2
Simplify the installation flow with clearer instructions.
Assumption to check: Some users find the installation process confusing
Validate with people who use this workflow before building.
Hypothesis 3
Optimize performance for handling larger font files.
Assumption to check: Occasional app crashes when loading large font files
Validate with people who use this workflow before building.
Hypothesis 4
Add categorization and tagging features for better font management.
Assumption to check: Missing font management features like organizing fonts
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
*** COMPATIBLE WITH WORD, EXCEL AND POWERPOINT FOR IOS *** With AnyFont it is finally possible to install any additional font in TrueTypeFont- (.ttf), OpenTypeFont- (.otf) or TrueType Collection- (.ttc) format on your iPhone or iPad. These fonts can then be used throughout the system in other apps like Word, PowerPoint, Pages, Keynote and many more. No more unexpectedly replaced fonts in presentations because the iPhone or iPad does not know them. The perfect solution for everybody who creates presentations on a Mac or PC to show them on their iPad. Extremely easy to use. An extensive FAQ and an introductory tutorial help you to understand the app. Check out this video tutorial: https://www.youtube.com/@AnyFont-iOS Features: - Add new fonts as .ttf, .ttc or .otf file using iTunes file sharing or the „Open in…“ dialog from other apps like Mail or Dropbox - Add single fonts or multiple fonts as a ZIP- or TTC-file - Install single fonts or multiple fonts at once - Preview your fonts in AnyFont’s storage - Access FontBundles.net from within AnyFont - Optional bundle of 1,000+ fonts (In-App Purchase) - Complete list of all installed fonts on the device - Support for Dark Mode (requires iOS 13) Working with: - Word, Excel and PowerPoint - Numbers, Keynote and Pages - Cricut Design Space - Office Suite Pro - Office²HD - and many other apps! AnyFont website: https://www.anyfont.app Tutorial Video: https://www.youtube.com/@AnyFont-iOS NOTE: It is not possible to change the system-font on your device with AnyFont. With AnyFont you can install additional fonts on your device which can then be used by other apps which make use of the device's font book. NOTE II: Some fonts using Cyrillic or Asian characters may not be supported by this way of installing fonts due to their size. The maximum size of a configuration profile for a font is 20 MB. NOTE III: You don't have to purchase the optional font bundle to use AnyFont. You can always add your own fonts to install them on your device.
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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 Navigation
Expo Font
Axios
React Native Vector Icons
Zustand
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.
