# HDRI Prep: VFX HDR Brackets — Bracket management For THETAs

> HDRI bracketing set management for RICOH THETA 360 cameras. (iPhone/iPad app by Squirrel FX LLC.)

- Source: https://appshunter.io/ios/app/hdri-prep-vfx-hdr-brackets/id1616103466 (this page in markdown: same URL + `.md`)
- Developer: [Squirrel FX LLC](https://appshunter.io/developer/1557764202)
- Category: Photo & Video, Utilities
- Price: $9.99
- Age rating: 4+
- Requires: iOS 17.0 · 11 MB
- Languages: American English
- Released: 2022-12-28
- Data updated: 2026-10-24
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/hdri-prep-vfx-hdr-brackets/id1616103466/reviews.md

## What is HDRI Prep?

Build a library of HDRI exposure brackets for your RICOH THETA V, Z1 or X, and fire them off on set in seconds.

The THETA can shoot multi-exposure brackets, but setting them up in the official app is slow, and you can't save them to reuse later. HDRI Prep fixes that. Set up a bracket once, name it, file it under your show, and call it up whenever the lighting calls for it.

BUILD BRACKETS THE WAY YOU THINK
• Choose 3 to 19 photos, 1 to 3 stops apart. No need to set each exposure by hand.
• Pick a center shutter speed, and the bracket spreads evenly above and below it.
• Set aperture, ISO and color temperature for the whole bracket at once. Choices are limited to what your camera can actually do.

ORGANIZED FOR PRODUCTION
• Name brackets, group them by show, drag to reorder, and copy or move them between shows.
• Each bracket is tinted by its color temperature, so tungsten and daylight setups stand out at a glance.

ON SET
• Live View, flat or as a 360° view you can drag around, to check the frame before you shoot.
• A shot counter and timer while the bracket runs, and Cancel if you need to stop.
• View the photos from that bracket the moment it finishes.
• Browse the camera's photos, inspect them full screen or in 360°, share them to Photos, Files or AirDrop, or delete them from the camera.
• Find nearby THETAs and join their Wi-Fi from the app. Cameras you've used are remembered.
• Adjust the camera's shutter volume and sleep delay.

TRY IT WITHOUT A CAMERA
Demo Mode loads sample 360° brackets so you can explore every feature before you plug in a THETA.

Works on iPhone, iPad and iPhone Duo, and includes a built-in Manual.

GOOD TO KNOW
• HDRI Prep connects over the camera's own Wi-Fi (the camera's access-point mode).
• Shutter volume and sleep delay are saved to the camera itself, so they stay set even when HDRI Prep isn't running.
• HDRI Prep focuses on bracketing. It isn't a replacement for the official THETA app, which works well alongside it.

Built by a VFX artist for VFX artists. If "HDRI" and "THETA" mean something to you, this was made for you.

HDRI Prep is not affiliated with or endorsed by RICOH. RICOH THETA is a trademark of Ricoh Company, Ltd.

Site and Privacy Policy: https://squirrelfx.llc/hdri-prep.html

## Key features

- Define custom bracket sets (3-19 photos, 1-3 stops apart)
- Set Aperture, ISO, and Color Temperature for all photos at once
- Define Center Shutter Speed to extend exposures
- Name, organize, and reorder brackets by show
- Duplicate and move bracket sets between shows
- View photos read directly from the camera
- Quickly adjust camera speaker volume and auto-sleep time

## Is HDRI Prep safe?

Not enough ratings yet to assess HDRI Prep.

## Is HDRI Prep legit?

HDRI Prep: VFX HDR Brackets appears to be a legitimate app. The AppsHunter Legitimacy Score for HDRI Prep is 90 out of 100 points across 7 verification signals from App Store and developer data.

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/hdri-prep-vfx-hdr-brackets/id1616103466/reviews.md

### 5/5 — Z1 it works

*2026-09-22*

Unlike standard options or plugins, this is hands down best solution for capturing HDRIs. In the past I could use plugins but some don’t support iPhone, additionally I had issues that certain ev ranges at the bottom end would not go darker and instead add more noise. 

This just works

## Frequently asked questions about HDRI Prep

### What cameras does HDRI Prep support?

HDRI Prep is designed for RICOH THETA 360 cameras, specifically the V, Z1, and X models. It requires a direct WiFi connection to the camera, assuming the IP address is 192.168.1.1.

### How many photos can be included in a bracket set?

You can define bracket sets to include between 3 and 19 photos. These numbers must always be odd to ensure symmetrical exposure bracketing.

### Can I save and reuse bracket settings with HDRI Prep?

Yes, a key feature of HDRI Prep is the ability to custom name brackets, organize them by show, and easily reuse them for different projects. You can also drag and drop to reorder them or move them between shows.

### Does HDRI Prep handle downloading and deleting images?

No, HDRI Prep focuses on bracket management. Image viewing is minimal, and you will need to use other apps like the official THETA app or Image Capture on Mac for downloading and deleting images.

### What are the limitations of HDRI Prep?

Currently, it only works with a direct WiFi connection to the camera and has minimal image viewing capabilities. Adjusting camera settings like volume or sleep time overwrites previous settings on the camera.

### Is HDRI Prep a replacement for the official THETA app?

No, HDRI Prep is a specialized utility designed to fill a specific functional gap in the official THETA app. It is not intended to be a full-featured replacement and is best used in conjunction with other apps.

### How often is HDRI Prep updated?

The app was last updated on December 12, 2025, with version 20251211.1. Future features may be added, but no specific update schedule is promised.

### What is the price of HDRI Prep?

HDRI Prep is a paid application, available for $9.99. There are no in-app purchases or subscriptions associated with this app.

## Version history (last 5 releases)

### 20261020.02 — 2026-10-21

New in this release:

      • Demo Mode: no camera handy?  Tap Try Demo Mode on the Camera Connection screen to explore the app with sample 360° brackets.  Capture, Live View, Pictures and sharing all work.  It ends when you connect a THETA.

      • Manual: a guide to every screen, in Settings.

      • Fixed: brackets more than 1 stop apart are now centered on the Center Shutter Speed.  Before, they came out darker than intended.

      • Shot counter: the Capture button counts the photos as they're taken, with a tap and a flash for each exposure.

      • View Photos: after a bracket, opens just the photos it took.

      • Color temperature: each bracket is tinted with its color temperature, orange for warm light and blue for cool, in the list and the editor.

      • Liquid Glass Capture, Cancel and View Photos buttons that no longer cover the bracket's settings.

      • New camera status icon on the main screen, and a new app icon.

      • A standard Close button on every sheet, and a clearer highlight for the selected bracket on iPad and iPhone Duo.

      • VoiceOver and spelling fixes.

      • Requires iOS 17 or later.

### 20251211.1 — 2025-12-12

iOS 26 Age Verification Compatibility.

### 20250922.1 — 2025-09-24

iOS 26 Compatibility

### 20230913.01 — 2023-09-21

• iOS 17 compatability.

### 20221229.01 — 2022-12-29

Updated email in About

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## More apps by Squirrel FX LLC

- [Alarum: Gentle Alarm Clock](https://appshunter.io/ios/app/alarum-gentle-alarm-clock/id1557764200)
- [Screen Prep: VFX Track Marks](https://appshunter.io/ios/app/screen-prep-vfx-track-marks/id1587599450)

All apps by Squirrel FX LLC: https://appshunter.io/developer/1557764202

## Related topics

[hdri prep](https://appshunter.io/ios/topics/hdri-prep) · [ricoh theta hdr](https://appshunter.io/ios/topics/ricoh-theta-hdr)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-24.*