App Overview

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JohnnyBASE

John Nyquist · Productivity

JohnnyBASE turns your contacts into a flexible personal database—without giving up the speed and clarity of a native Apple app.

$2.99

PRICE
$2.99
No in-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet

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 included

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.

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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.

App evidence

Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.

App Store description

JohnnyBASE turns your contacts into a flexible personal database—without giving up the speed and clarity of a native Apple app. SEE MORE AT ONCE Use a true column-based contact table on iPhone, iPad, and Mac. Choose, reorder, and resize built-in or custom-field columns. Sort directly from a heading or create a multi-level sort order with independent directions. A fast A–Z rail helps you jump through long lists. FIND EXACTLY WHO YOU NEED Search names, companies, titles, notes, contact methods, addresses, and custom fields. Scope a quick search to one chosen field, or combine advanced conditions using all or any. Match text that contains, begins with, or exactly equals a value—or find empty and nonempty fields. Save useful searches by name for later. ORGANIZE CONTACTS YOUR WAY Keep separate contact lists for different parts of your life and work. Create reusable groups without copying or moving records. Mark contacts to build a temporary working set, then show only those records when you need to act on them. Your current group, search, marked set, and sort order stay together as you browse cards, manage group membership, export records, or prepare mailing labels. MAKE EVERY RECORD FIT Add list-wide custom fields using text, multiline text, number, date, date and time, yes/no, single-choice, or multiple-choice values. Custom fields automatically appear in contact cards and editing, and you can also search, display, and sort them in the table. Store multiple labeled phone numbers, email addresses, websites, and postal addresses, with a preferred value for each. Keep searchable rich-text notes and insert a bold date-and-time stamp with one tap. IMPORT, EXPORT, AND PRINT Import selected people through Apple’s privacy-preserving Contacts picker, or import all contacts after granting access. Exchange ordinary contact data with vCard and CSV files. A JohnnyBASE archive preserves the complete contact-list structure, including custom fields, groups, rich notes, photos, and recently deleted records. Create mailing-label PDFs from exactly the contacts currently showing. JohnnyBASE includes four Avery-compatible US Letter layouts, supports partially used sheets, and can share the PDF or send it to Apple’s print sheet. READY ACROSS YOUR DEVICES JohnnyBASE saves changes locally first, so your contact database remains available offline. Its local store is mirrored through your private iCloud database for use across JohnnyBASE on iPhone, iPad, and Mac. App Shortcuts can open a contact, find contacts, or create a new contact.

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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
BUILD KIT DIFFICULTY

Not assessed in a Build Kit yet.

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.