Introduction Building a functional ARKit app is one challenge — building one that performs smoothly at 60fps, feels natural to users, and passes App Store review is another. After years of delivering iOS AR projects, the GSoft Technologies mobile development team has collected the tips, patterns, and hard-won lessons that separate good AR apps from great ones. Here are 10 actionable ARKit and RealityKit tips for better iOS AR apps in 2026. What is ARKit and RealityKit? ARKit is Apple’s core augmented reality framework handling world tracking, plane detection, LiDAR scene reconstruction, image recognition, and face tracking. RealityKit is the high-level rendering and simulation framework built on top of ARKit and Metal, providing physically-based rendering, an entity-component system, physics simulation, and spatial audio. Together, they form the complete iOS AR development stack for Swift developers targeting iPhone and iPad in mobile app development projects. Key Features / Why It Matters Tight hardware integration: Apple controls both hardware and software, allowing ARKit to leverage LiDAR, TrueDepth, and the Neural Engine with APIs unavailable on cross-platform AR frameworks. Rapid capability evolution: Each iOS release ships meaningful ARKit improvements — visionOS spatial computing is built on the same foundations. Reality Composer Pro tooling: The visual authoring pipeline dramatically reduces iteration time for AR scene construction. App Store scale: With over a billion active iOS devices, ARKit-powered features reach a massive, hardware-capable audience. 10 ARKit and RealityKit Tips for 2026 Tip 1 — Always Use ARCoachingOverlayView: let coachingOverlay = ARCoachingOverlayView()coachingOverlay.session = arView.sessioncoachingOverlay.goal = .horizontalPlanecoachingOverlay.delegate = selfarView.addSubview(coachingOverlay)coachingOverlay.setActive(true, animated: true) Tip 2 — Adapt Quality to Device Capability: let config = ARWorldTrackingConfiguration()if ARWorldTrackingConfiguration.supportsSceneReconstruction(.meshWithClassification) { config.sceneReconstruction = .meshWithClassification arView.environment.sceneUnderstanding.options = [.collision, .physics, .occlusion]}arView.session.run(config) Tip 3 — Load Assets Asynchronously: Task { do { let model = try await ModelEntity.loadModel(named: "product") await MainActor.run { placeEntity(model) } } catch { print("Asset load failed: (error.localizedDescription)") }} Tip 4 — Install Gestures for Free Manipulation: modelEntity.generateCollisionShapes(recursive: true)arView.installGestures([.translation, .rotation, .scale], for: modelEntity) Tip 5 — Pause the Session in Background: Register for UIApplication.didEnterBackgroundNotification and pause the session to prevent camera resource locks and save battery. Resume on foreground return. Tip 6 — Use Snapshot for App Store Screenshots: ARKit does not work in Simulator. Use arView.snapshot(saveToHDR: false) to programmatically capture screenshots from a real device during development. Tip 7 — Limit Active Anchor Count: Each active anchor consumes tracking resources. Remove anchors no longer needed with arView.scene.removeAnchor(anchor) . Use a single AnchorEntity with multiple child entities rather than one anchor per object. Tip 8 — Debug with AR Debug Options: #if DEBUGarView.debugOptions = [ .showFeaturePoints, .showAnchorOrigins, .showSceneUnderstanding]#endif Tip 9 — Use Environment Texturing for Realism: Set config.environmentTexturing = .automatic so RealityKit samples the real environment for reflections — metallic and glossy objects will look dramatically more realistic with zero extra code. Tip 10 — Validate with Reality Composer Pro Before Shipping: Run your AR scene through Reality Composer Pro’s simulator view and check for polygon count warnings, texture memory warnings, and animation issues before submitting to App Store review. Best Practices The most common performance issues in iOS AR apps come from oversiz