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Mergius: HDR Photo & Tone map

Mergius: HDR Photo & Tone map

HDR, tone mapp, photo adjust

0 ratings
2 reviews
🔧 Utilities
📷 Photo & Video
Free
In-App Purchases

Details

  • Released
  • Updated
  • August 13, 2025
  • November 22, 2025

Features

Developer

Roman Sisik
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About

Effortlessly merge multiple exposures into stunning High Dynamic Range images with professional-grade tools. Achieve perfect alignment and advanced tone mapping for breathtaking results. Supports professional file formats for a precise workflow.

✓HDR and Exposure Fusion
✓Automatic Image Alignment
✓Pro File Support (.exr, .hdr)
✓Advanced Tone Mapping Operators
✓Final Adjustments (White Balance, Brightness)
✓Flexible Export Options
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What's New in Mergius

1.5

November 22, 2025

- fixed crashes - fixed swapped colors

Subscription plans

Mergius Pro (Annual)

Unlimited access to premium features

$29.991 Year
How to cancel Mergius subscription ⁉️

User reviews

Most RecentHighest RatedLowest Rated

Doesn’t work

Kept crashing when I’d try to add photos
SuperdoopermanSuperdooperman

Response from developer

I'm not able to replicate your issue on my devices. Can you provide more information? What was the format and size of the image files. What exactly did you tap inside the app? Were there any error messages? If possible, can you provide the image samples? You can reply directly to my email roman@sisik.eu

Pretty Dismal

Doesn’t export.
ChildrensWriterChildrensWriter

Response from developer

Don't understand. Is the export to radiance hdr or OpenEXR not working for you? Can you provide more information about your issue? Is there an error message? What exactly are you trying to do? You can send information directly roman@sisik.eu. If I find any issues, I'll try to fix those as soon as possible.

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FAQ

What is Mergius used for?

Mergius is used to merge multiple photos into a single High Dynamic Range (HDR) image and apply advanced tone mapping for professional-looking results. It also supports professional file formats like OpenEXR and Radiance.

Does Mergius offer a free trial?

Yes, Mergius offers a free trial for its premium features. The 'Unlock Premium Features' subscription plan includes a 3-day free trial before the $4.99/week charge.

What are the paid features in Mergius?

Paid features include automatic image alignment, the Robertson HDR algorithm, specific tone-mapping algorithms (Reinhard, Drago, Mantiuk), Auto White Balance, saturation adjustment, shadow/highlight controls, and export to .exr/.hdr formats.

How often is Mergius updated?

The app was last updated on November 22, 2025, indicating a recent update. The latest version is 1.5.

What devices is Mergius available on?

Mergius is available on iPhone and iPad devices, as indicated by the supported devices list.

What is the age rating for Mergius?

Mergius has an age rating of 4+, making it suitable for a wide range of users.

Can I cancel my Mergius subscription?

Yes, users can typically cancel subscriptions through their device's app store settings. The subscription plans are billed weekly or annually.

Does Mergius have ads?

No, Mergius does not contain advertisements. The app is free to download with optional in-app purchases for premium features.