HDRI Prep vs VoxScan
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HDRI Prep
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HDRI Prep is a small utility for use in visual effects for creating HDRI bracketing sets for RICOH THETA 360 cameras, specifically, the V, Z1 and X. (If you don't know what all that is than this app probably isn't for you.) Different bracket settings are needed for different production situations. The THETA cameras does do multi-image exposure bracketing that you can set with the iPhone THETA app, but modifying them is painfully slow and difficult and you can't save sets and reuse them later. I wrote this to fill that need and speed up use of the THETA on set for taking HDRIs. With HDRI Prep you can: • Define brackets as X number of photos (3 to 19, always odd numbers) taken X stops apart (1 to 3) rather than setting each photo’s parameters individually • Pick the camera and you can set the Aperture, ISO and Color Temperature for all the photos at once with the settings limited to what the camera can actually execute • Pick a Center Shutter Speed and the bracket extends exposures equally higher and lower • Custom name brackets, organize by show, drag and drop reorder them, move between shows, and duplicate them as needed • View the photos taken read from the camera Quickly modify the Camera’s speaker volume and time it takes to auto-sleep (up to 60 minutes so watch your battery) HDRI Prep is not intended to be a full featured replacement for other THETA iPhone apps. It is designed only to fill a hole in the current functionality of the official THETA app (and what 3rd party apps I've played with): to make a library of Bracket settings, a method of organizing them, and a way to call them up and use them quickly on set. As such you will find it is missing various functions of the official THETA app. Those extended features may be added at some later date, but I make no promises. I recommend using it in conjunction with other apps as needed. Some limitations of the app: • Currently this only works with a direct Wifi connection to the camera (camera hosting Wifi) and it assumes the ip address is 192.168.1.1. • Image viewing is minimal. You can see what is on the camera (heads up, it's slow to load) but I am leaving the downloading and deleting of images up to other apps. You can use the official THETA app or you can manage them on a Mac using Image Capture (you're on your own with Windows). • Be aware that adjusting the camera shutter sound volume and the sleep delay time writes these changes to the camera, overwriting any previous camera setting. If you change the sleep time to 10 minutes it will stay that way even when HDRI Prep isn't connected or running. • If you want to see a live count of the images as they are taken you can actually switch to the official THETA app after beginning a capture. I hope to add this to my interface in the future.
VoxScan
This app allows users to capture and export 3D models using LiDAR technology, with support for various file formats. It also enables USDZ import for creating voxel models, even on devices without LiDAR. Compatibility extends to Apple Vision Pro for experiencing creations.
- LiDAR 3D model capture
- Export in .vox, .ply, .usdz, .stl, .glTF, .obj
- USDZ import for voxel creation
- Apple Vision Pro compatibility
- iOS 17+ and LiDAR camera required for capture
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Key Features: Capture and Export Functionality: VoxScan seamlessly captures and exports your creations in various formats, including .vox, .ply, .usdz, .stl, .glTF, and .obj, offering versatility for your 3D modeling projects. USDZ Import Service: Explore new dimensions by importing USDZ 3D file formats, enabling Voxel Model creation even on iPhone models without LiDAR cameras. Apple Vision Pro Compatibility: VoxScan extends its support to Apple Vision Pro, supporting only functionality to experience the Voxel Model Creation feature. Capture Feature Requirements: To utilize the capture feature, iOS 17+ and an iPhone with a LiDAR camera are essential. Apple Vision Pro and Other iPhone Models(Without LiDAR Camera Support) Note: Please be aware that on Apple Vision Pro and other iPhone models without LiDAR camera support, only the input feature will be functional. Supported Input Format: The exclusive supported input format is USDZ. Particularly effective are 3D models created through object capture using Photogrammetry. However, please note that importing USDZ files containing complex 3D models, such as those with separated objects, excessively large or small mesh data, and animated objects, may result in display issues, including the possibility of rendering nothing in the space. Exercise caution when importing such files. Supported Export Formats: Export your creations in diverse file formats, including .vox, .ply, .usdz, .stl, .glTF, and .obj. Tested on: VoxScan has undergone successful testing on iPhone 12 Pro and 15 Pro models. MagicaVoxel Note: Please note that the model's color will be based on the default MagicaVoxel color palette, resulting in a different appearance compared to our app. Unlock the potential of 3D modeling with VoxScan – Download now and bring your creations to life!
Screenshots
Verdict
The clearest difference is price: VoxScan at Free against HDRI Prep's $9.99. VoxScan also leads on update cadence (every 5 weeks vs every 6 months). HDRI Prep's advantage is iOS requirement (15.0 vs 17.0). On ads, in-app purchases and device support 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
VoxScan is free to download; HDRI Prep costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
HDRI Prep ships an update every 6 months, VoxScan every 5 weeks. The most recent releases landed on September 10, 2026 and June 1, 2026 respectively.
| Parameter | HDRI Prep | VoxScan |
|---|---|---|
| Price | $9.99 | Free — better |
| Positive reviews | — | 0.0% of reviews |
| Update frequency | Every 6 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, Vision Pro |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 1 MB | 27 MB |
| Age rating | 4+ | 4+ |
| Developer | Squirrel FX LLC | Yasuo Hasegawa |
In-app purchases
HDRI Prep
No in-app purchases
VoxScan
No in-app purchases









