How to build a crypto portfolio tracker app for iOS
What a crypto portfolio tracker app needs
- Holdings entry: coin, amount, and optionally the buy price for cost basis
- Live prices from a crypto market data API, refreshed on a schedule
- Portfolio totals with profit and loss, in the user's chosen currency
- Per-coin detail with a price chart over common time ranges
- Price alerts using local notifications when a coin crosses a threshold
- A Home Screen and Lock Screen widget showing portfolio value or watched coins
- A server-side proxy that holds the market API key, so it never ships in the app
Keep the scope to tracking. Adding trading or buy and sell features pulls in heavy regulatory and App Review requirements, so a read-only tracker is the simpler and safer first version.
How to build it with AppFlight
Describe it in plain English, for example: "A crypto portfolio tracker where I add holdings by coin and amount with an optional buy price, see live prices and my total value with profit and loss, view a chart per coin, set price alerts that notify me, and show portfolio value in a Home Screen widget. Prices come through my backend so the market API key stays server-side." With AppFlight, the public client keys ship in the app while backend secrets like your market API key stay server-side in your own Supabase, and the generated app calls a backend function for prices. AppFlight generates native SwiftUI, wires the integrations and the widget, and launches it in a live simulator so you can add a holding and watch the totals update. You iterate in plain language, for example adding a watchlist or multiple portfolios.
Monetization for a crypto portfolio tracker app
The common model is a free tracker with a paid upgrade. Free users get one portfolio and basic prices; the subscription unlocks price alerts, multiple portfolios, longer history and charts, and widget styles. Add a RevenueCat paywall for subscriptions, and use Superwall to test paywall designs without shipping an update. A few dollars a month or a yearly plan fits finance utility apps. Keep the marketing and the features clearly about tracking, not advice, so the positioning stays clean for review.
Shipping it to the App Store
When the app is ready, AppFlight signs the build, uploads to TestFlight so you can test prices, alerts, and the widget on your own device, then submits to the App Store with metadata and screenshots from the simulator. Finance apps get extra scrutiny, so be clear that the app tracks holdings and is not financial advice, and avoid features that resemble trading unless you are prepared for the added requirements. If Apple rejects the build, AppFlight reads the reason, works on the fix, and resubmits. Apple reviews every app, so a submission is not the same as an approval.
FAQ
Do I need to code to build a crypto portfolio tracker?
No. You describe the app in plain English and AppFlight generates native Swift and SwiftUI. You connect a market data API for prices, with the API key kept server-side rather than in the app.
Where do live prices come from?
From a crypto market data API that returns current prices and historical data. The app calls your backend, which holds the API key and forwards the request, so the key never ships in the app. Prices refresh on a schedule and a widget can show them on the Home Screen.
How do crypto tracker apps make money?
A free tracker with a subscription for price alerts, multiple portfolios, more history, and widget styles is common. A RevenueCat or Superwall paywall handles billing. Avoid features that look like financial advice or trading, which Apple scrutinizes closely.