App Overview

Exchange rate converter icon

Exchange rate converter

Raphael Odermatt · Finance

Get a very popular and intuitive currency converter and access the latest exchange rates quickly and easily

$1.99 · In-app purchases

PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
4.8
26 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 included17 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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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 Exchange rate converter: map the core Finance 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

Include a wider range of currencies and real-time exchange rates.

Assumption to check: Limited currency options compared to competitors

Validate with people who use this workflow before building.

Hypothesis 2

Allow users to save frequently used conversions for quick access.

Assumption to check: No ability to save favorite conversions

Validate with people who use this workflow before building.

Hypothesis 3

Implement offline mode for recent conversions.

Assumption to check: Lack of offline functionality

Validate with people who use this workflow before building.

Hypothesis 4

Enhance UI with modern design elements and animations.

Assumption to check: Basic user interface

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

Get a very popular and intuitive currency converter and access the latest exchange rates quickly and easily. The converter features exchange rates for over 150 countries and commodities. Create your personal currency list and have them a first glance, even offline. Use the built in calculator to verify all your business. We bring currency exchange rates to your Apple Watch. Access and convert currencies directly on your Watch. CURRENCY RATES AND CHARTS ● Major world currencies, crypto-currencies and precious metals (150+) ● Graphs for historical exchange rates (week, month, 3 months, year and 10 years) ● Push notifications ● Intuitive and efficient user interface ● Switch base currency with one click ● Export charts CALCULATOR ● Full featured built-in calculator ● Verify prices manually PERSONALIZE YOUR SETTINGS ● Configure your currency list ● Thresholds for notifications ● Set the precision you need OFFLINE ● Use without internet ● Access the rates from the latest update ● No roaming fees APPLE WATCH ● Convert on your Apple Watch CURRENCIES ● EUR, USD, CHF, GBP, JPY, AED, AFN, ALL, AMD, ANG, AOA, ARS, AUD, AWG, AZN, BAM, BBD, BDT, BGN, BHD, BIF, BMD, BND, BOB, BRL, BSD, BTN, BWP, BYR, BZD, CAD, CLP, CNY, COP, CRC, CUC, CUP, CVE, CZK, DJF, DKK, DOP, DZD, ECS, EEK, EGP, ERN, ETB, FJD, FKP, GHS, GIP, GMD, GNF, GTQ, GYD, HKD, HNL, HRK, HTG, HUF, IDR, ILS, INR, IQD, IRR, ISK, JMD, JOD, KES, KHR, KMF, KPW, KRW, KWD, KYD, KZT, LAK, LBP, LKR, LRD, LSL, LTL, LVL, LYD, MAD, MDL, MKD, MMK, MNT, MOP, MRO, MTL, MUR, MVR, MWK, MXN, MYR, MZN, NAD, NGN, NIO, NOK, NPR, NZD, OMR, PAB, PEN, PGK, PHP, PKR, PLN, PYG, QAR, RON, RSD, RUB, RWF, SAR, SBD, SCR, SDG, SEK, SGD, SHP, SIT, SKK, SLL, SOS, STD, SVC, SYP, SZL, THB, TND, TOP, TRY, TTD, TWD, TZS, UAH, UGX, UYU, VEF, VND, VUV, WST, XAF, XAG, XAL, XAU, XCD, XCP, XOF, XPD, XPF, XPT, YER, ZAR, ZMK, ZWD --------------------------------------------------------------- Thank you for all your feedback! If you miss something, let us know: [email protected] ---------------------------------------------------------------

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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 Native
Expo
React Navigation
Redux
React Native Vector Icons
Axios
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.