App Overview

ConvertDroid: Unit Converter icon

ConvertDroid: Unit Converter

The Zardoz Group LLC · Reference

Convert almost anything, instantly

$0.99 · In-app purchases

PRICE
$0.99
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.

Build your own version

Build Kit

Make this idea yours

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

First kit free with a verified email

Add to a Remix

Combine features and design from your favorite apps.

Kit ready. Verify your email to download it.

What's included13 files

A product spec, phased build plan, differentiation notes, and screen references.

  • START_HERE
  • AGENTS
  • EVIDENCE
  • SPEC
  • BUILD_PLAN
  • DIFFERENTIATION
  • skills/
  • screens/
Preview a sample Build Kit No email needed

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.

JavaScript is required to complete mailbox verification.

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 ConvertDroid: Unit Converter: map the core Reference workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
            

Preview ready. Verify your email to reveal and copy the full prompt.

JavaScript is required to complete mailbox verification. Return to this prompt preview.

Continue in Rork copies the full prompt to your clipboard first, then opens Rork in a new tab.

Continue in Rork >

Affiliate link: CloneChart may earn a commission at no extra cost

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

Include a wider variety of measurement types.

Assumption to check: Limited unit options compared to competitors

Validate with people who use this workflow before building.

Hypothesis 2

Implement a favorites feature for quick access.

Assumption to check: No ability to save favorite conversions

Validate with people who use this workflow before building.

Hypothesis 3

Modernize the UI with current design trends.

Assumption to check: User interface feels outdated

Validate with people who use this workflow before building.

Hypothesis 4

Allow users to customize settings like themes and units.

Assumption to check: Not enough customization options for users

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

Convert almost anything, instantly. ConvertDroid packs 444 units across 46 categories into one clean, fast, offline unit converter — no ads, no account, no fumbling through menus. EVERY UNIT YOU'LL ACTUALLY NEED - Length, mass, area, volume, temperature, pressure, speed, density, force, torque, angle, angular speed, volumetric flow - Energy, power, electrical resistance, frequency, and time period - Luminance, illuminance, radioactivity, and Carbon-14 dating - Data storage, data transfer rate, transfer-time estimates, video timecode & frame rates, video file size, and numeral systems (binary, octal, hex, Base-36, RGB, Unicode) - Everyday time, fuel economy (US, UK & metric mpg), navigation bearings, and SI prefixes - International clothing & size charts: men's and women's suits, shirts, shoes, socks, dresses, blouses, stockings, bra band & cup sizes, ring sizes, and hat sizes — across US, UK, EU, Japanese, French, Italian, and Australian systems BUILT TO ACTUALLY USE, NOT JUST BROWSE - Custom in-app keypad — no clumsy system keyboard - Search across all 316 units to jump straight to what you need - Star up to 12 favorites for one-tap access - Automatic history of your last 50 conversions - Adjustable decimal precision and thousands separator (comma or space) DESIGNED WITH CARE A warm, neubrutalist look — bold borders, hard shadows, a cream-and-orange palette — built for phone and tablet alike, with a dedicated landscape and iPad layout including a persistent category sidebar. PRIVATE BY DESIGN Everything runs on your device. No account, no tracking, no network calls required — your conversions stay yours. Whether you're cooking, studying physics, buying shoes abroad, reading a datasheet's resistor bands, or figuring out how long a 4K file takes to transfer over USB, ConvertDroid has the unit for it.

Written user reviews are not shown here. Check current App Store reviews >

Screenshots

< Scroll to see more >

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
Redux
React Navigation
Axios
AsyncStorage
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.