Comparison

Instant HDR vs Glowroom

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

Head to head
About

Instant HDR

Features
Read full description

Instant HDR converts ordinary photos into real HDR JPEGs tuned for Instagram posting. Most HDR photo apps push a stronger effect before upload. But Instagram applies its own HDR processing, which can visibly alter the image after posting. Instant HDR is built around that behavior. Instead of chasing an exaggerated pre-upload preview, Instant HDR is tuned to preserve your photo’s intended look after Instagram upload, while still producing a bold HDR effect once the post goes live. Features: • One-tap HDR conversion • Tuned specifically for Instagram posting • Helps keep your SDR image stable after upload • Local on-device processing • Saves the converted HDR JPEG to your photo library • Optional subscription removes the export watermark Instant HDR is made for creators who want reliable HDR output — not a preview that falls apart after posting. Terms of Use: https://hdrguru.vercel.app/terms Privacy Policy: https://hdrguru.vercel.app/privacy

About

Glowroom

Transform your SDR photos into true HDR with brilliant highlights and enhanced detail. This app synthesizes HDR gain maps, allowing you to edit and relight images directly on your device. It offers precision editing tools and exports in HDR formats for stunning visuals on compatible displays.

Highlights
  • SDR to HDR conversion
  • Synthesized HDR gain maps
  • Precision editing tools
  • Live histogram
  • One-tap Auto correction
  • HDR export formats (HEIC, Adaptive HDR JPEG)
  • Photos extension for in-app editing
Features
Read full description

Shot in SDR? Convert it. Already HDR? Relight it. Glowroom turns any photo into true HDR. It synthesizes a real HDR gain map — the same technology behind iPhone HDR photos — so your images glow with brilliant highlights on HDR displays and still look great everywhere else. Glowroom does both, entirely on your device — free and private, no uploads. FIND YOUR NON-HDR PHOTOS Proprietary feature -- Glowroom scans your entire library to discover every SDR (Standard Dynamic Range) photo. Filter by date or device, omit screenshots, and collect them all into a single album with one tap. Your best candidates for HDR conversion. PRECISION EDITING • Levels correction with a live histogram — drag the black, white, and midtone points like a pro • One-tap Auto that reads the scene and fixes it naturally • Exposure, contrast, highlights, shadows, midtones, saturation, temperature, clarity, dehaze & more BUILT NATIVE for iOS. • Real gain-map export (HEIC & Adaptive HDR JPEG) • Live EDR preview — see the glow as you edit • Save a new copy, or update the original reversibly in the Photos App. • Edit right inside Photos with the Glowroom extension • Crop with social presets (Instagram, TikTok, YouTube, X…) and precise straightening BATCH EDITING. • Coming soon Free with reduced-resolution, watermarked saves. Glowroom Pro unlocks full-resolution, watermark-free exports, save-to-original, the Photos extension, and SDR Finder albums. Glowroom Pro is available as an auto-renewable monthly subscription ($3.99/month) or a one-time Lifetime purchase ($8.99). Payment is charged to your Apple ID at purchase confirmation. Monthly subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current period; manage or cancel anytime in your App Store account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://vlodkodesign.com/glowroom/privacy.html Make your photos brilliant!

Screenshots

Instant HDR4 screens
Glowroom4 screens

Verdict

The call

The clearest difference is iOS requirement: Instant HDR at 16.0 against Glowroom's 18.0. On price, update cadence, ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Instant HDR sells 1 in-app purchase, starting at $2.99 per month and Glowroom sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

Scorecard1 real difference · 9 level
Instant HDR versus Glowroom: the parameters behind the verdict, then further details
ParameterInstant HDRGlowroom
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 2 weeksEvery 2 weeks
AdsNoNo
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhoneiPhone, iPad — better
Requires iOS16.0 — better18.0
Further details — not scored
Size7 MB19 MB
Age rating4+4+
DeveloperAlexander ChaldryanMYKOLA KINDRATYSHYN

In-app purchases

1 purchases

Instant HDR

Subscriptions1
  • Instant HDR Premium$2.991 Month
2 purchases

Glowroom

Subscriptions1
  • HDR Photo Lab Pro$3.991 Month
One-time1
  • HDR Photo Lab Pro Lifetime$8.99

Questions

Is Instant HDR free?
Instant HDR is free to download, with in-app purchases available.
Is Glowroom free?
Glowroom is free to download, with in-app purchases available.
Do Instant HDR or Glowroom have ads?
Neither Instant HDR nor Glowroom shows ads.
Which is updated more often, Instant HDR or Glowroom?
Instant HDR ships an update every 2 weeks, and Glowroom every 2 weeks. Most recently, Instant HDR was updated on October 24, 2026 and Glowroom on October 31, 2026.

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