RZ Timecode Calculator vs HDRI Prep
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RZ Timecode Calculator
This tool assists with timecode calculations for video editing and animation. It's designed for field use when built-in editing software functions are not readily available. A simple and useful utility for creative professionals.
- Timecode calculations
- Video editing assistance
- Animation support
- Field use utility
- Simple interface
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I used to have a calculator called the FrameMaster. It was wonderful and useful for video editing and animation. Now this function is pretty much built in to the editing apps. However, you may find yourself in the field needing to do some simple timecode calculations, and then, THIS IS APP YOUR BEST FRIEND!
HDRI Prep
This utility helps visual effects professionals create HDRI bracketing sets for RICOH THETA 360 cameras. It allows for quick definition, organization, and reuse of bracket settings, streamlining on-set workflows for HDR photography.
- 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
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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
Screenshots
Verdict
The clearest difference is price: RZ Timecode Calculator at Free against HDRI Prep's $9.99. RZ Timecode Calculator also leads on iOS requirement (15.6 vs 17.0). On update cadence, 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
RZ Timecode Calculator is free to download; HDRI Prep costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
RZ Timecode Calculator ships an update every 10 months, HDRI Prep every 9 months. The most recent releases landed on September 16, 2026 and October 24, 2026 respectively.
| Parameter | RZ Timecode Calculator | HDRI Prep |
|---|---|---|
| Price | Free — better | $9.99 |
| Rating | 1.0 (2 ratings) — better | — |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 2 — better | — |
| Update frequency | Every 10 months | Every 9 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 1 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Robert L Zimmelman | Squirrel FX LLC |
Customer experience
RZ Timecode Calculator
HDRI Prep
In-app purchases
RZ Timecode Calculator
No in-app purchases
HDRI Prep
No in-app purchases
Questions
Is RZ Timecode Calculator free?
Is HDRI Prep free?
Do RZ Timecode Calculator or HDRI Prep have ads?
Which is updated more often, RZ Timecode Calculator or HDRI Prep?
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