Bolt.new AI and HealthKit integration: Step-by-Step Guide 2025

The short direct answer is: Bolt.new cannot integrate directly with Apple HealthKit because HealthKit data never leaves the user’s iPhone and there is no public cloud API for HealthKit. To integrate them, you must build an iOS app (or a small Swift helper app) that reads HealthKit data locally on the device, then send that data to your Bolt.new backend through your own API endpoint.

HealthKit is strictly on‑device for privacy, so the only correct and real-world pattern is: iOS app with HealthKit → your backend API → Bolt.new workspace logic.

 

What’s actually possible and how it works

 

To make this integration real, you need three moving parts:

• An iOS app with permission from the user to read HealthKit data.
• A backend API endpoint that receives data from the iOS app. This endpoint can live inside your Bolt.new project.
• Logic inside Bolt.new that stores, processes, or uses the incoming data.

HealthKit does not allow any cloud service (including Bolt.new) to request data directly. The user’s device is the only actor that can read it, with explicit permission.

 

Step-by-step: How to integrate HealthKit with Bolt.new

 

Here is the practical, real integration flow used by mobile engineers:

• Build a minimal Swift iOS helper app. It can be tiny — just enough to read HealthKit data you need.
• Request HealthKit permissions on the device.
• Read HealthKit data (for example, steps, heart rate, or workouts).
• Send the data to your Bolt.new backend using a normal HTTP request.
• Expose an API route in Bolt.new (Node, Python, or whatever you're using in your workspace) that accepts POST requests.
• Use environment variables in Bolt.new for API keys or tokens so you can authenticate the mobile-to-backend request.

This is the only real, secure, and Apple-approved way.

 

iOS code example (REAL code) to read steps from HealthKit and POST to your Bolt.new backend

 

import HealthKit
import Foundation

let healthStore = HKHealthStore()

func requestPermissions() {
    let stepType = HKQuantityType.quantityType(forIdentifier: .stepCount)!
    
    healthStore.requestAuthorization(toShare: [], read: [stepType]) { success, error in
        if !success {
            print("Permission denied: \(error?.localizedDescription ?? "Unknown error")")
        }
    }
}

func fetchStepsAndSend() {
    let stepType = HKQuantityType.quantityType(forIdentifier: .stepCount)!
    
    let start = Calendar.current.startOfDay(for: Date())
    let predicate = HKQuery.predicateForSamples(withStart: start, end: Date(), options: [])
    
    let query = HKStatisticsQuery(quantityType: stepType, quantitySamplePredicate: predicate, options: .cumulativeSum) { _, result, _ in
        if let sum = result?.sumQuantity() {
            let steps = sum.doubleValue(for: HKUnit.count())
            sendToBackend(steps: steps)
        }
    }
    
    healthStore.execute(query)
}

func sendToBackend(steps: Double) {
    guard let url = URL(string: "https://your-bolt-backend-url.com/api/healthkit/steps") else { return }
    
    var req = URLRequest(url: url)
    req.httpMethod = "POST"
    req.addValue("application/json", forHTTPHeaderField: "Content-Type")
    
    // Include an API key stored in your Bolt.new environment variables
    req.addValue("YOUR_API_KEY", forHTTPHeaderField: "x-api-key")
    
    let body = ["steps": steps]
    req.httpBody = try? JSONSerialization.data(withJSONObject: body)
    
    URLSession.shared.dataTask(with: req).resume()
}

 

Bolt.new backend route example (Node.js)

 

// Example Express route inside your Bolt.new backend

app.post("/api/healthkit/steps", async (req, res) => {
  const apiKey = req.headers["x-api-key"];

  // Validate API key from env variable
  if (apiKey !== process.env.HEALTHKIT_INGEST_KEY) {
    return res.status(403).json({ error: "Unauthorized" });
  }

  const steps = req.body.steps;

  console.log("Received HealthKit steps:", steps);

  // Store or process data here
  // e.g., write to database, trigger analysis, etc.

  res.json({ status: "ok" });
});

 

Important constraints

 

• HealthKit data NEVER leaves the phone unless the user’s device sends it.
• Bolt.new cannot pull HealthKit data directly.
• You must have an iOS component to read HealthKit — this is mandatory.
• Your backend must be HTTPS (Bolt.new provides this), or iOS will block the request.

This is the real, production-correct pattern used across all apps integrating with HealthKit (including big health/wellness apps). It’s the only technically and legally valid way.