Comparison

Biyoree vs Gain Map HDR Converter

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

Biyoree

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Biyoree is a camera and photo editor for enjoying carefully crafted film color and texture. Preview your final look in real time before you shoot, then capture photos and videos with the atmosphere of the moment intact. You can also import photos from your library and edit them afterward. โ–  Dozens of Original Film Looks Choose from dozens of color and black-and-white film looks. Find a tone that fits the light, skin, scenery, shadows, and feeling of each photo. โ–  Films Crafted One by One Each film is designed beyond color alone, with its own contrast, grain, texture, highlights, and shadows. Instead of getting lost in small adjustments, choose the film that fits the moment and let the look come together. โ–  Real-Time Film Camera Shoot photos and videos while previewing the selected film look. Register up to five favorite looks and switch between them quickly. โ–  Expressive Blur Adjust blur strength and create a more dimensional finish while keeping people clear. โ–  Frames That Complete the Photo Choose from slim, classic, Polaroid-style, gallery, and other layouts. Customize margins, color, aspect ratio, and photo placement. โ–  Titles and EXIF Layouts Beautifully place titles, subtitles, film names, dates, camera, lens, and shooting settings on your photos. โ–  Flexible Ratios and Cropping Supports 1:1, 4:5, 16:9, 9:16, and more. Drag, pinch, and rotate to adjust photo placement intuitively. โ–  Before / After Comparison Compare the original and edited photo with a slider while choosing the film color and texture that fit best. Everyday moments, travel memories, and time with people you care about. Turn them into photos worth remembering with Biyoree.

About

Gain Map HDR Converter

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
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Your display can show far more light than your photos ever use. Gain Map HDR puts it to work. Every photo on your iPhone was captured with a range of brightness that standard displays simply clip away. Gain Map HDR rebuilds that range and writes it as a true HDR gain map, so highlights glow on your iPhone, iPad and Mac โ€” while the image still looks right everywhere else. HOW IT WORKS - Import from your photo library or from Files - Choose HDR or GLOW and dial in the exact intensity - Compare against the original at any time - Save back to Photos or export to a folder BUILT ON STANDARDS - True ISO 21496-1 gain map โ€” the open HDR standard, not a filter - 10-bit HEIF output for smooth gradients with no banding - Display P3 wide-gamut color - Graceful fallback: on non-HDR screens your photo looks exactly as it should MADE FOR PHOTOGRAPHERS - Author, copyright, IPTC and GPS metadata preserved - Batch processing for entire shoots - 4:5 crop, ready for social - Full-width editing in landscape, with every control in reach PRIVATE BY DESIGN Everything happens on your iPhone. No cloud processing, no account, no uploads. Your photos never leave your device. Gain Map HDR doesn't invent detail or push saturation. It rebuilds the brightness range your camera already captured, and writes it in the format Apple devices are built to read.

Screenshots

Biyoree4 screens
Gain Map HDR Converter4 screens

Verdict

The call

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.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

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.

UpkeepUpdate frequency

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.

Scorecard2 real differences ยท 6 level
Biyoree versus Gain Map HDR Converter: the parameters behind the verdict, then further details
ParameterBiyoreeGain Map HDR Converter
PriceFree โ€” better$3.99
Positive reviewsโ€”100.0% of reviews
Update frequencyEvery 4 days โ€” betterEvery 2 weeks
AdsNoNo
In-app purchasesNoNo
Monetizationโ€”Paid
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.2 โ€” better18.6
Further details โ€” not scored
Size26 MB7 MB
Age rating4+4+
DeveloperTakuma YamamotoMARCELO PITZ ESPINDOLA

In-app purchases

None

Biyoree

No in-app purchases

None

Gain Map HDR Converter

No in-app purchases

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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