# Biyoree vs Gain Map HDR Converter

The clearest difference is price: Biyoree at Free against Gain Map HDR Converter's $3.99. Biyoree also leads on update cadence (every 4 days vs every 2 weeks). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Biyoree is free to download; Gain Map HDR Converter costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Biyoree ships an update every 4 days, Gain Map HDR Converter every 2 weeks. The most recent releases landed on November 5, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Biyoree | Gain Map HDR Converter |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 2 weeks |
| Monetization | — | Paid |
| Size | 26 MB | 7 MB |
| Requires iOS | **18.2** | 18.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Takuma Yamamoto](https://appshunter.io/developer/1841030936) | [MARCELO PITZ ESPINDOLA](https://appshunter.io/developer/1820969307) |

## What reviewers say

### Biyoree

[App page](https://appshunter.io/ios/app/biyoree/id6782320195)

**In-app purchases:** none


### Gain Map HDR Converter

[App page](https://appshunter.io/ios/app/gain-map-hdr-converter/id6794502526)

Enhance your photos by rebuilding their brightness range to create true HDR images. This app preserves metadata and offers batch processing, making your highlights glow on compatible devices while looking great everywhere else.

**Highlights:** Create true HDR gain maps, Preserves metadata, Batch processing, 10-bit HEIF output, Supports Display P3 color, Private by design

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Biyoree free?

Biyoree is free to download, with no in-app purchases.

### Is Gain Map HDR Converter free?

Gain Map HDR Converter costs $3.99, with no in-app purchases.

### Do Biyoree or Gain Map HDR Converter have ads?

Neither Biyoree nor Gain Map HDR Converter shows ads.

### Which is updated more often, Biyoree or Gain Map HDR Converter?

Biyoree ships an update every 4 days, and Gain Map HDR Converter every 2 weeks. Most recently, Biyoree was updated on November 5, 2026 and Gain Map HDR Converter on November 6, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*