Comparison

KIRI Engine vs HDRI Studio

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

KIRI Engine

Easily create high-quality 3D models from photos or videos directly on your phone. Offers advanced scanning technologies for detailed results, with editing and export options for various platforms. Ideal for artists, designers, and 3D printing enthusiasts.

Highlights
  • Photogrammetry 3D scanning
  • Neural Surface Reconstruction (NSR)
  • 3D Gaussian Splatting
  • Auto Object Masking
  • Augmented Reality preview
  • Multiple export formats (OBJ, STL, GLTF)
  • AI PBR Material Generation (Pro)
Features
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3D scanning has never been simpler with KIRI Engine: create high-quality 3D models on your phone within minutes. Dive into 3D scanning and modeling tailored for artists, designers, engineers, and 3D printing enthusiasts. Unleash the Power of 3D Scanning: • Photogrammetry: 3D scan with Photo Scan to transform your photos into high-quality 3D models. • NSR (Neural Surface Reconstruction): 3D Scan featureless/shiny objects with a video processed by Neural Radiance Fields (NeRF) integrated Featureless Object Scan. • 3D Gaussian Splatting: Obtain full 3D visualizations with a video, scan and capture all elements in your scene, including reflections. Create Your Own 3D Model through a Delightful Experience: • Capturing: Snapping photos replaces your 3D modeling process, obtain a detailed 3D mesh in just minutes from scanning to generating. • Functional Free Version: Dive into the world of photogrammetry without paying a cent for subscriptions, a LiDAR sensor, or an expensive 3D Scanner. Upload unlimited 3D scans and export at least 3 times per week. Edit, Refine, and Personalize Your Creations: • Edit: Refine 3D models with editing tools; adjust your files in Photo Scan, Featureless Object Scan, and 3D gaussian splats. • Precision: Choose specific photos for processing to ensure detailed, high-quality 3D models. • Cleanup: Auto Object Masking for noise-free, clean models during capture by eliminating background elements. This feature also allows the object to be moved during the capture. • Preview: Employ the 3D viewer and augmented reality panels to directly visualize and adjust your completed 3D model. Share, Export, and Make Use of Your 3D Models: • For Free: free registration and unlimited scanning, with at least 3 exports weekly. • Share: On various platforms such as Sketchfab, Thingiverse, GeoScan, and more. • Formats: Export in OBJ, STL, FBX, GLTF, GLB, USDZ, PLY, XYZ, compatible with Blender 3D, Unreal Engine, Autodesk Maya, etc. • Wide usage: For game development, VFX, VR/AR 3D content creation, 3D printing, 3D visualization, and many more. • Precision Without LiDAR: KIRI’s advanced algorithms provide scanning quality that is on par with LiDAR sensors. KIRI Engine Pro – For Those Who Demand More: • Upload: Pro users can leverage camera rolls, ensuring a flexible 3D scanning experience. • Quad-Mesh Retopology: Refine scanned 3D models with automatic quad-mesh adjustment. • AI PBR Material Generation: Attain lifelike textures with AI-generated PBR materials. • Advanced Camera System: Perfect each shot with fine-tuned camera settings for impeccable 3D scans. • Featureless Object Scan: Utilizes Neural Surface Reconstruction (NSR) for scanning shiny/reflective surfaces, a first in practical 3D scanning with KIRI Engine. • 3D Gaussian Splatting: Experience the future of 3D scanning and capture accurate 3D scenes with a short video; edit using tools like sphere/plane cutters and brushes. Export in native format or OBJ. • WEB Version Access: KIRI Engine WEB offers professional-grade model creation from DSLR photo sets or drone scans, enhancing accuracy in mappings and drone-based 3D surveys. Engage with Our Caring Community: Join our Discord community for sharing, feature voting, giveaways, and engaging with fellow enthusiasts. Dive into 3D Scanning with KIRI Engine Today! Download the KIRI Engine 3D Scanner app and embark on your 3D scanning journey with your device. Available in these languages:  English: KIRI Engine: 3D Scanner App Chinese (中文): 3D 扫描仪App Japanese (日本語): 3Dスキャナーアプリ French (Français): Application Scanner 3D Russian (Русский): Приложение 3D-сканера Privacy Policy: https://www.kiriengine.app/privacy-policy Terms Of Service: https://www.kiriengine.app/user-agreement

About

HDRI Studio

Features
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Light your 3D scenes with the real light of any place. HDRI Studio turns your iPhone into a 360° HDRI camera: follow the dots and get a 32-bit EXR for Blender, Unreal Engine, Nuke and more. No 360 camera, chrome ball or tripod. HOW IT WORKS • Follow 18 dots, or 26 in tight spaces • Hold still on each dot and the app shoots a RAW exposure bracket • Add one ground photo to help remove your feet from the floor • Render online, then save the .exr to Files WHAT YOU GET • 32-bit float OpenEXR, scene-linear Rec.709, relative brightness • Exact 2:1 equirectangular 360° panorama • 4K (4096 × 2048), or 8K (8192 × 4096) where available • Real lighting and reflections for 3D, VFX, archviz and product renders CHECK YOUR RESULT • Look around in the 360° viewer with touch or gyro, and pinch to zoom • Change the preview exposure from −4 to +6 EV without touching the file • Read the size, peak and mean brightness, and contrast in EV • Open compatible .exr files from Files and review every shot in the gallery • Render a saved capture again at another available resolution • Keep finished EXRs in your private iCloud Drive with iCloud Library WORKS WITH Blender, Unreal Engine, Nuke, Houdini, Cinema 4D, Maya and other tools that read OpenEXR. Use your captures in personal and commercial projects. PRICING No account needed. Capturing, your Library and viewing are free, and two render credits are included. More renders use one-time credits or Pro. 4K uses 1 credit and 8K uses 4. Pro gives 20 render credits every month and exports the complete original RAW bracket set plus capture metadata. Failed or cancelled renders return their credits. GOOD TO KNOW • Needs iOS 17 or later and an iPhone with a RAW-capable ultra-wide camera • Rendering needs an internet connection • Captures and downloaded EXRs stay on your iPhone until you delete them • With iCloud Library on, finished EXRs also go to your private iCloud Drive. RAW brackets stay on your iPhone • Hosted results are kept privately for up to 30 days so interrupted downloads can resume Privacy Policy: https://hdristudio.app/privacy Terms of Use: https://hdristudio.app/terms Apple Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

KIRI Engine4 screens
HDRI Studio4 screens

Verdict

The call

The clearest difference is update cadence: HDRI Studio at weekly against KIRI Engine's every 3 weeks. KIRI Engine's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. KIRI Engine sells 10 in-app purchases, starting at $9.99 per month and HDRI Studio sells 3 in-app purchases, starting at $19.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

KIRI Engine ships an update every 3 weeks, HDRI Studio weekly. The most recent releases landed on November 7, 2026 and November 10, 2026 respectively.

Scorecard3 real differences · 7 level
KIRI Engine versus HDRI Studio: the parameters behind the verdict, then further details
ParameterKIRI EngineHDRI Studio
PriceFreeFree
Rating4.4 (1.3K ratings) — better—
Positive reviews62.1% of reviews—
Number of ratings1.3K — better—
Update frequencyEvery 3 weeksWeekly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better17.0
Further details — not scored
Size135 MB72 MB
Age rating4+4+
DeveloperKIRI Innovation (Hongkong) LimitedGianluca Gatto

In-app purchases

10 purchases

KIRI Engine

Subscriptions10
  • KIRI Pro Monthly Renewal$9.991 Month
  • KIRI Pro Monthly Renewal$14.991 Month
  • KIRI Pro Monthly Renewal$17.991 Month
Show 7 more
  • KIRI Pro Annual Renewal Sale23$29.991 Year
  • KIRI Pro Yearly Renewal Sale25$35.991 Year
  • KIRI Pro Yearly Renewal Sale24$35.991 Year
  • KIRI Pro Yearly Renewal Newbie$35.991 Year
  • KIRI Pro Yearly Renewal Return$47.991 Year
  • KIRI Pro Yearly Renewal Newbie$47.991 Year
  • KIRI Pro Yearly Renewal7 Days trial$79.991 Year
3 purchases

HDRI Studio

Subscriptions1
  • Pro$19.991 Month
One-time2
  • 4K Render Credit$2.99
  • 8K Render Credit$7.99

Questions

Is KIRI Engine free?
KIRI Engine is free to download, with in-app purchases available.
Is HDRI Studio free?
HDRI Studio is free to download, with in-app purchases available.
Do KIRI Engine or HDRI Studio have ads?
Neither KIRI Engine nor HDRI Studio shows ads.
Which is updated more often, KIRI Engine or HDRI Studio?
KIRI Engine ships an update every 3 weeks, and HDRI Studio weekly. Most recently, KIRI Engine was updated on November 7, 2026 and HDRI Studio on November 10, 2026.

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