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]#endifTip 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 oversized assets, too many concurrent anchors, and blocking the main thread during asset loading. Profile with Xcode’s Instruments on real hardware before every major release. Keep polygon counts as low as visually acceptable — typical consumer AR objects target 5,000–50,000 polygons. Compress textures using ASTC format for optimal GPU memory on Apple Silicon. Write unit tests for your AR logic even though the ARSession itself cannot be unit tested.
Real-World Use Cases at GSoft Technologies
These 10 tips emerged directly from GSoft Technologies’ iOS mobile development practice. Tip 2 (adaptive LiDAR quality) saved a retail client’s app after it crashed on iPhone SE devices during beta testing. Tip 7 (limiting anchor count) resolved a severe performance regression in a museum AR tour app. Tip 8 (debug options) helped identify a plane detection issue in a real estate app that only manifested on certain floor textures. The cumulative impact of applying all 10 tips consistently is the difference between a 3-star AR experience and a 5-star one on the App Store.
Conclusion
Great ARKit and RealityKit development is as much about discipline and polish as technical capability. These 10 tips — adaptive quality, async loading, coaching overlays, session lifecycle management, and robust debugging — form a practical checklist for every iOS AR project in 2026. Contact GSoft Technologies to build your next Swift/iOS AR project — we bring the deep expertise to make your app shine on the App Store.