# HDR Transformer — HDR Simulation & Conversion

> HDR Simulation & Conversion (iPhone/iPad app by 栋 张.)

- Source: https://appshunter.io/ios/app/hdr-transformer/id6760416369 (this page in markdown: same URL + `.md`)
- Developer: [栋 张](https://appshunter.io/developer/1859653493)
- Category: Photo & Video, Utilities
- Price: $9.99
- Age rating: 4+
- Requires: iOS 18.0 · 61 MB
- Languages: American English, German (Germany), Chinese (Simplified, China)
- Released: 2026-03-23
- Data updated: 2026-08-31
- User reviews in markdown: https://appshunter.io/ios/app/hdr-transformer/id6760416369/reviews.md

## What is HDR Transformer?

HDR Converter is a derivative product of the Prismatik app, designed to create a professional, easy-to-use, clean, and aesthetically pleasing HDR simulation and conversion tool.

HDR Converter provides professional-grade HDR processing tools—from the brilliant transformation of SDR to HDR, to seamless conversion between multiple HDR formats—all completed offline on your device with 100% privacy protection. It is also optimized for Xiaohongshu (RedNote), making your posts stand out.

Core Features

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HDR Simulation — Breathe New Life into Every Image

Whether it's digital photography, classic artwork, or AI-generated content, HDR Simulation infuses images with realistic brightness and tonal depth. Built on Apple's official HDR Gain Map pipeline with targeted optimizations, it ensures every exported HDR photo has accurate luminance mapping and full metadata support.

Smart Algorithm, One-Tap Simulation: Default parameters are automatically calculated based on in-depth image analysis, preserving natural light relationships while enhancing depth, luster, and spatial presence.
Professional Manual Controls: Three core parameters—Highlight Boost, Highlight Range, and Peak Headroom—are provided, adhering to professional photography standards to reshape light with precision, not brute-force brightening.
Platform-Specific Optimization: Tailored for Xiaohongshu (RedNote) and Instagram, ensuring your HDR work retains its stunning visual impact after upload.
Efficient Batch Processing: Supports multi-task queue management, allowing you to add photos at any time and export individually or in batches.

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HDR Conversion — Break Down Format Barriers

Say goodbye to HDR format incompatibility. HDR Converter fully supports bidirectional conversion across all major HDR standards.

Supported formats include:

Apple HDR (HEIF / JPEG): Perfectly compatible with the Apple ecosystem.
Apple HDR (Compatible/HEIF): Optimized specifically for platforms like Xiaohongshu (RedNote), solving the issue of HDR loss after upload.
ISO Gain Map (HEIF): A universal mapping standard compliant with international specifications.
ISO HDR (PQ / HLG): Covers both broadcast-grade and consumer HDR standards—for example, .hif (HLG) files from Nikon Z cameras can be converted to Apple HDR (Compatible/HEIF) and shared directly to Xiaohongshu.
All conversion processes preserve original metadata and support both Display P3 and sRGB color gamuts, meeting every need from professional review to social sharing.

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Privacy & Security

We adhere to a strict "data localization" policy. All image processing is completed offline on your device—no uploads of any kind, no tracking components. Your work stays yours.


## Version history (last 3 releases)

### 1.2.0 — 2026-04-09

Added a new photo import method: from Files.
Improved HDR conversion support for TIFF-format HDR photos.
Optimized the UI and animation feedback on the HDR conversion page.
Enhanced performance and stability, especially for multitasking and exporting.
Now supports Nikon high-efficiency RAW files (system version needs to be updated to 26.4 or later).
Other bug fixes.

### 1.1.0 — 2026-03-26

Added Apple HDR (HEIF / compatible, boost) export option (Simulation & Conversion), compatible with Xiaohongshu.
Added support for exporting SDR/HDR comparison images (Stitched & Beveled), compatible with Xiaohongshu.

### 1.0 — 2026-03-23

No release notes.

## More apps by 栋 张

- [Prismatik](https://appshunter.io/ios/app/prismatik/id6756304471)
- [Imaging Console](https://appshunter.io/ios/app/imaging-console/id6768196167)
- [Imaging Console Lite](https://appshunter.io/ios/app/imaging-console-lite/id6788416417)

All apps by 栋 张: https://appshunter.io/developer/1859653493

## Related topics

[hdr to sdr](https://appshunter.io/ios/topics/hdr-to-sdr) · [vuer hdr](https://appshunter.io/ios/topics/vuer-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 2026-08-31.*