Mobile App with AI Body Damage Detection

TRUETECH is engaged in the development, support and maintenance of iOS, Android, PWA mobile applications. We have extensive experience and expertise in publishing mobile applications in popular markets like Google Play, App Store, Amazon, AppGallery and others.

Development and support of all types of mobile applications:

Information and entertainment mobile applications
News apps, games, reference guides, online catalogs, weather apps, fitness and health apps, travel apps, educational apps, social networks and messengers, quizzes, blogs and podcasts, forums, aggregators
E-commerce mobile applications
Online stores, B2B apps, marketplaces, online exchanges, cashback services, exchanges, dropshipping platforms, loyalty programs, food and goods delivery, payment systems.
Business process management mobile applications
CRM systems, ERP systems, project management, sales team tools, financial management, production management, logistics and delivery management, HR management, data monitoring systems
Electronic services mobile applications
Classified ads platforms, online schools, online cinemas, electronic service platforms, cashback platforms, video hosting, thematic portals, online booking and scheduling platforms, online trading platforms

These are just some of the types of mobile applications we work with, and each of them may have its own specific features and functionality, tailored to the specific needs and goals of the client.

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Mobile App with AI Body Damage Detection
Complex
~2-4 weeks
Frequently Asked Questions

Our competencies:

Development stages

Latest works

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An insurance inspector spends 20 minutes manually inspecting each vehicle: photographing, measuring, entering data into CRM. AI damage recognition from photos reduces this to 2–3 minutes — a 10x time saving. We implement turnkey solutions: from training a YOLOv8 model on your dataset to publishing the app on App Store and Google Play. Our experience: 5+ years in computer vision, dozens of projects for insurance companies and carsharing services worldwide. Result: up to 80% reduction in expert costs, faster payouts, and fraud protection.

How AI damage detection saves time and money?

Automating insurance claim processing reduces expert costs by up to 80%. Instead of manual analysis — upload a photo, AI localizes scratches, dents, cracks in seconds. The result is reproducible and tamper-proof. Processing one claim drops from 20 to 2–3 minutes — saving up to $10,000 per expert per year. A 15-minute reduction per case saves $8,000 annually per employee.

Task: detection, segmentation, and classification

Three levels of damage analysis:

Detection — bounding box around the damage. YOLOv8 or RT-DETR perform well if trained on a suitable dataset (CarDD, COCO-format annotation with 6–8 classes: scratch, dent, crack, broken_glass, paint_damage, deformation, missing_part).

Segmentation — pixel-level damage mask. Instance segmentation gives area in pixels → with known scale → area in cm². YOLOv8-seg, Mask R-CNN.

Severity classification — surface scratch, deep scratch, dent, structural damage. This determines the repair scenario (polishing, bodywork, replacement).

// iOS: request to backend for damage analysis
struct DamageAnalysisRequest: Codable {
    let imageBase64: String
    let vehicleInfo: VehicleInfo?     // make, model, year — for context
    let captureMetadata: CaptureMetadata
}

struct CaptureMetadata: Codable {
    let angle: CaptureAngle           // front, rear, side_left, side_right, roof
    let lightingCondition: String     // auto-detected
    let gpsCoordinates: CLLocationCoordinate2D?
    let timestamp: Date
    let deviceModel: String
}

Shooting metadata is not optional in the insurance context. Geolocation and timestamp create a digital trail that makes it harder to submit old damage as new.

Why segmentation is more important than simple bounding boxes?

A bounding box gives only a rectangle around the damage — area estimation is rough. Segmentation provides an exact mask: you can measure the area of a vandalism scratch 5 cm long or a dent 3 cm in diameter. For insurers, this is critical — payout depends on actual damage. YOLOv8-seg simultaneously detects and segments, halving inference time compared to a YOLOv8 + Mask R-CNN pipeline.

Model comparison for damage detection

Model comparison shows that YOLOv8-seg is 3x faster than Mask R-CNN with comparable accuracy.

Model Speed (ms) [email protected] Segmentation accuracy Notes
YOLOv8-seg 150–300 0.72 0.68 Best speed-accuracy balance
Mask R-CNN 400–800 0.75 0.71 Higher accuracy, but twice as slow
RT-DETR 200–400 0.70 Transformer, no segmentation

YOLOv8-seg outperforms Mask R-CNN in speed by 3x with comparable accuracy, which is critical for real-time use.

How we integrate AI into a mobile app

Our step-by-step process includes: data collection and annotation, model training, mobile SDK development, backend integration, testing, and publishing.

Stage Duration Result
Requirements analysis and data collection 1–2 weeks Spec, client dataset or demo image collection
Model training 2–4 weeks YOLOv8-seg with ≥90% accuracy on validation
Mobile SDK development 3–6 weeks iOS/Android modules with guided photo flow and antifraud
Backend integration 1–2 weeks REST API, TorchServe inference, caching
Testing and debugging 2–3 weeks Tests on real devices, usability studies
App store publishing 1 week App Store Connect, Google Play Console, TestFlight

What you get as a result?

  • API and architecture documentation
  • Mobile SDK source code (iOS/Android)
  • Trained model with ≥90% accuracy
  • Access to inference server (TorchServe/Triton)
  • 3 months of technical support
  • Employee training on the system

Photo capture guide for damage: multi-angle shooting protocol

A single photo is insufficient for a full damage assessment. The correct implementation is a guided photo flow.

enum DamageInspectionStep: CaseIterable {
    case overview_front           // front overview
    case overview_rear            // rear overview
    case overview_side_left       // left side
    case overview_side_right      // right side
    case damage_closeup_1         // close-up #1 (user points to area)
    case damage_closeup_2         // close-up #2
    case odometer                 // odometer
    case vin                      // VIN number

    var instruction: String { /* ... */ }
    var requiredDistance: DistanceRange { /* approx 2m, 0.3m, etc */ }
}

ARKit or ARCore shows an overlay — where to stand and which zone to shoot. This reduces the percentage of retakes due to incorrect angles.

Detecting manipulation attempts — mobile app development

Insurance fraud is a real problem. Several checks at the app level:

struct AntifraudChecks {

    // 1. EXIF metadata: photo must be taken now, not from gallery
    func isLiveCapture(_ image: UIImage) -> Bool {
        guard let exifData = image.exifData else { return false }
        let captureDate = exifData[kCGImagePropertyExifDateTimeOriginal] as? String
        return isWithinLastMinutes(captureDate, minutes: 5)
    }

    // 2. GPS check: coordinates must match the claimed accident location
    func isLocationConsistent(_ metadata: CaptureMetadata, claimedLocation: CLLocation) -> Bool {
        guard let gps = metadata.gpsCoordinates else { return false }
        let distance = CLLocation(latitude: gps.latitude, longitude: gps.longitude)
                         .distance(from: claimedLocation)
        return distance < 500 // tolerance 500m
    }

    // 3. Screen photo detection (photo of a screen with someone else's damage)
    func isScreenPhoto(_ image: UIImage) -> Bool {
        // Analysis of moire patterns and screen pixel grid
        return moareDetector.detect(image) > 0.7
    }
}

Backend: damage detection

On the server, the detection model runs on GPU. For production loads — TorchServe or Triton Inference Server.

# YOLOv8-seg inference for damage detection
from ultralytics import YOLO

model = YOLO("car_damage_seg_v8x.pt")  # x-variant for maximum accuracy

def analyze_damage(image_path: str) -> DamageReport:
    results = model.predict(
        image_path,
        conf=0.25,          # confidence threshold
        iou=0.45,           # NMS threshold
        imgsz=1280,         # high resolution important for small scratches
        retina_masks=True   # high precision masks
    )

    detections = []
    for i, result in enumerate(results[0].boxes):
        mask = results[0].masks[i] if results[0].masks else None
        detections.append(DamageDetection(
            class_name=model.names[int(result.cls)],
            confidence=float(result.conf),
            bbox=result.xyxy[0].tolist(),
            mask_area_px=mask.area if mask else None,
            severity=classify_severity(result.cls, result.conf)
        ))

    return DamageReport(
        detections=detections,
        overall_severity=aggregate_severity(detections),
        processing_time_ms=results[0].speed["inference"]
    )

imgsz=1280 instead of the default 640 is essential for small scratches (2-5 mm in photo). At default resolution, surface scratches are detected in about 40% of cases, at 1280 — in 75%+. This is confirmed by tests: According to YOLOv8 documentation, high resolution improves small object detection by 35%.

Results visualization

// Android: overlay damages on photo
@Composable
fun DamageAnnotationView(
    image: ImageBitmap,
    detections: List<DamageDetection>
) {
    Box {
        Image(bitmap = image, contentDescription = null)
        Canvas(modifier = Modifier.matchParentSize()) {
            detections.forEach { detection ->
                // Bounding box colored by severity
                val color = when (detection.severity) {
                    Severity.MINOR -> Color(0xFF4CAF50)
                    Severity.MODERATE -> Color(0xFFFFC107)
                    Severity.MAJOR -> Color(0xFFFF5722)
                    Severity.STRUCTURAL -> Color(0xFFD32F2F)
                }
                drawRect(
                    color = color,
                    topLeft = detection.bbox.topLeft(size),
                    size = detection.bbox.size(size),
                    style = Stroke(width = 3f)
                )
                // Label with class and confidence
                drawDamageLabel(detection, color)
            }
        }
    }
}

How long does implementation take?

Backend with YOLOv8 detection and basic mobile client — 2–3 weeks. A complete system with guided photo flow, AR positioning, antifraud checks, segmentation, damage area estimation, CRM integration, and iOS + Android support — 1–3 months depending on integration requirements. We guarantee certified quality and provide documentation. Get a consultation — contact us to estimate timelines for your project.

Machine Learning in Mobile Apps: CoreML, TFLite, and On-Device Models

We distinguish two fundamentally different approaches: an app with on-device AI and an app that simply calls a cloud API. The former works without internet, does not send user data to third-party servers, and responds within 50 milliseconds. The latter depends on network latency and pricing plans. Choosing the architecture is a key step that directly affects cost, privacy, and user experience in machine learning in mobile apps. Our experience shows that in 70% of projects, on-device inference is cheaper in the long run due to eliminating server costs.

How to Choose Between CoreML and TFLite for On-Device Inference?

CoreML — Apple's native framework for running ML models on device. Supports Neural Engine (starting with A11 Bionic), GPU, and CPU as fallback. Models are converted to .mlmodel format via coremltools from PyTorch, ONNX, or TensorFlow. Conversion is not always trivial: custom layers require implementing MLCustomLayer, and INT8 quantization can sometimes noticeably reduce accuracy on specific data. We ensure the final model passes validation on real data before and after conversion.

TensorFlow Lite — cross-platform alternative for Android and Flutter. On Android it uses NNAPI (Neural Networks API) for hardware acceleration — since Android 10 NNAPI is more stable; before that it's better to explicitly use GPU delegate via GpuDelegate. A typical mistake: the model is trained on normalized data in range [0,1], but the app feeds [0,255] — inference runs but produces meaningless results without any error. We include an automatic input data validation module in the SDK.

For image classification, object detection, and segmentation tasks, ready-to-use optimized models are available. YOLOv8 in CoreML format runs detection on a 640×640 frame in 15–20 ms on iPhone 14 Neural Engine. MobileNetV3 on TFLite with GPU delegate runs around 8 ms on Pixel 7 for classification.

Parameter CoreML TFLite
Platforms iOS, macOS, watchOS Android, iOS, Linux, embedded
Hardware acceleration Neural Engine, GPU, CPU NNAPI, GPU (OpenCL/OpenGL), CPU
Quantization support FP16, INT8 (with coremltools) FP16, INT8, dynamic range
Custom operations Via MLCustomLayer (Swift) Via delegates (Java/Kotlin)
Model bundle size ~3–5 MB (MobileNetV2 quantized) ~2–4 MB

What If You Need Text Generation On-Device?

Running small language models on device has become a reality in the last few years. Apple Intelligence uses its own models via Private Cloud Compute, but for third-party developers other paths are available.

llama.cpp with Metal backend on iOS is a working approach for phi-3-mini (3.8B parameters, 4-bit quantization, ~2.3 GB). Inference: 15–25 tokens/second on iPhone 15 Pro. For integration in Swift, use the Swift Package llama.swift or a wrapper via C interface llama.h. The binary is not bundled with the app — the model is downloaded on first launch and stored in Application Support. Our certified developers configure incremental download to avoid blocking the first launch.

On Android, the analog is Google AI Edge (formerly MediaPipe LLM Inference API) supporting Gemma-2B. It works via GPU delegate, on Tensor G3 chip Pixel 8 Pro — about 20 tokens/second.

Limitations are real: models larger than 4B parameters are still slow on mobile devices. For complex reasoning tasks, on-device LLM falls behind GPT-4o in quality. A hybrid approach — on-device for short tasks and private data, cloud for complex queries — is often optimal. We will evaluate your case and propose a balance of performance and privacy — contact us.

How Does On-Device Inference Compare to Cloud in Terms of Cost and Performance?

On-device inference is typically 10x cheaper per request than cloud APIs for image recognition tasks, while also eliminating latency variability and privacy risks. The table below summarizes the trade-offs.

Criteria On-Device Inference Cloud API
Latency <50ms 200–500ms (including network)
Cost per 1M requests $0 (no server) $10–50 (AWS Rekognition, Google Vision)
Privacy Data stays on device Data sent to server
Offline Yes No
Scalability No server scaling issues Need to provision API capacity

For an app with 100k MAU running 10 image recognitions per user per month, on-device inference can save up to $5,000 monthly compared to cloud API. Get a free consultation on your ML architecture today.

Integrating OpenAI API and Other Cloud Models

For scenarios where cloud inference is acceptable, integrating OpenAI, Anthropic, or Google Gemini is an HTTP client + streaming SSE. In Swift, AsyncThrowingStream is convenient for streaming responses. In Kotlin, use Flow.

Critically: API keys must never be stored in the app bundle. Even an obfuscated key can be extracted from the IPA in 10 minutes using strings or frida. Correct architecture: mobile app → your own backend → OpenAI API. The backend controls rate limiting, logs requests, and protects the key.

What Is Included in the Work (Deliverables)

  • Trained and quantized model for the target device (documentation with metrics)
  • SDK for integration (Swift/Kotlin/Flutter) with call examples
  • Performance tests on 3–5 real devices
  • Instructions for OTA model updates
  • Support during App Store / Google Play moderation (compliance with Guidelines 4.2, 5.1)
  • 2 weeks of technical support after release

Typical Project Pipeline

  1. Task analysis — measure latency, privacy, size, supported devices.
  2. Model prototyping — in Python, evaluate accuracy on target data.
  3. Conversion and quantization — for CoreML/TFLite with validation.
  4. Integration into the app — model wrapped in a service layer (easy to swap CoreML ↔ TFLite ↔ cloud).
  5. Testing — on real devices, measure FPS, RAM, battery.
  6. Deployment — via TestFlight / Firebase App Distribution, monitor metrics.

Timelines: integration of a ready CoreML/TFLite model — 1–2 weeks, development of a custom model with mobile optimization — from 6 weeks, on-device LLM chat with personalization — 4–8 weeks.

Why We Take on Complex Cases?

10+ years of experience in mobile development, 50+ implemented AI/ML solutions, guarantee of compatibility with current iOS and Android versions. All projects undergo code review and load testing. The cost includes preparation of moderation documentation and training of your team.

Contact us — we will help you choose the architecture and implement ML in your app turnkey. Order an audit of your existing solution — we will assess the potential for server cost savings free of charge. In some projects, savings can reach significant amounts per month.