RAW2HDR vs GridFix
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RAW2HDR
Transform your camera's RAW files into stunning 10-bit HDR images with over a billion colors. Enhance brightness, shadows, and color depth for photos that truly pop. Includes professional editing tools, black & white conversion, and customizable frames.
- RAW to 10-bit HDR conversion
- Enhanced color depth and dynamic range
- Professional editing tools
- Black & white conversion
- Customizable picture frames and borders
- LUT and style simulations
- Universal RAW file support
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Unlock the True Potential of Your Photos : raw2hdr transforms your camera's RAW files into stunning 10-bit HDR images that bring your photography to life. Whether you're shooting with a Sony, Fujifilm, Canon, or Leica, this app unlocks the full dynamic range hiding in your RAW files. What is 10-bit HDR? Standard photos are limited to 8-bit color (16 million colors). 10-bit HDR images contain over 1 billion colors — that's 64 times more color information! This means: * Brighter whites that truly shine without washing out * Deeper shadows with visible detail instead of pure black * Richer colors that match what your eyes actually saw * Glowing highlights in sunsets, city lights, and reflections Think of it like viewing your photos through a professional slide projector instead of looking at a print — everything has depth, luminance, and presence that jumps off the screen. The HDR Difference You Can See When you view HDR images on modern iPhones, iPads, or HDR-enabled displays, you'll notice: * Sunsets actually glow with warm radiance * City lights sparkle like real life * Black & white photos show brilliant whites that feel illuminated from within * Picture frames make your images pop off the screen with dimensional depth Perfect for Social Media - Share your HDR masterpieces where they'll shine: * Instagram - HDR photos stand out in feeds with eye-catching vibrancy * Threads - Your HDR images will stop the scroll * iMessage - Send HDR photos that look stunning on recipients' HDR screens * iPhone Photos - Full HDR viewing with the HDR badge Professional Editing Tools : * Histogram, Crop mode, Exposure, Contrast, Black Point, White Balance, Shadow Recovery, Lens Correction, Noise Reduction Black & White Conversion : * Transform your photos into luminous black & white images where whites actually glow brighter than standard photos. In HDR, monochrome photography reaches a new level — imagine viewing Ansel Adams prints with a backlight. Picture Frames & Borders : * Borders in any size with any colors * Custom aspect ratios (65:24 x-pan, 16:9, 4:3, 3:2, 1:1, or original) * Flexible alignment * HDR frames create a gallery presentation effect — like matted prints in a professional exhibition Simulations & LUTs: * Adding styles into your images in both SDR / HDR from ranges of 50+ styles Universal RAW Support - Apple's CIRAWFilter for professional-grade RAW processing Works with RAW files from major camera brands: * Sony (ARW) * Fujifilm (RAF) — including X-Trans sensors * Canon (CR2, CR3) * Leica, Apple, DJI, Google, Sigma, Ricoh (DNG) * Panasonic (RAW, RW2) * Hasselblad (3FR) * Olympus (ORF) * Pentax (PEF) * Nikon (NEF) * And many more... The Value of Converting to HDR : Your camera captures far more light information than what standard 8-bit photos can display. RAW files contain this "hidden" data, but you need HDR to actually see it. Standard Photo: Clipped highlights, crushed shadows, compressed colors HDR Conversion: Full dynamic range, glowing lights, rich shadows, true-to-life colors It's like the difference between looking through a dirty window vs. standing outside — suddenly everything is vivid, dimensional, and real. How It Works : 1. Import your RAW photos from anywhere 2. Convert to 10-bit HDR HEIC with a single tap 3. Editing with adjustments, add elegant frames, experimenting with film simulations 4. Share to Instagram, Threads, or save to Photos 5. Experience your photos in stunning HDR on compatible displays See the Difference : The difference between standard photos and HDR is impossible to describe — you have to see it. Once you experience HDR images on an HDR display, standard photos will feel flat and lifeless by comparison.
GridFix
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Tilt your camera up at a building and the verticals lean inward. Let your hand tip and the horizon goes crooked. GridFix fixes this the most intuitive way possible: draw guide lines along the edges that should be straight, and the app computes the perspective correction that makes them truly vertical and horizontal. And now, you can get it right at the moment you shoot. LIVE-CORRECTED CAMERA - The corrected image shows live in the viewfinder. What you see is what you get, no guesswork afterwards - A tilt readout shows your pitch and roll at all times - Correct verticals only, or auto-level the horizon as well - Pinch to zoom, EV compensation scale, long-press AE/AF lock, self-timer, volume-button shutter - Level sensor calibration: a fixed offset from your case or sensor tolerance is measured once and subtracted from then on - The session gallery lets you review shots, compare with the original, or send one straight into the editor EDIT IMPORTED PHOTOS - Guide-line correction: no blind slider fiddling, just show the app which lines should be straight - Double-tap to zoom: magnify right where you are working and trace window frames and beams precisely - A loupe keeps the edge visible while you drag, positioned for right- or left-handed use - Lens distortion correction: fixes the outward bow of ultra-wide edges, which perspective correction alone cannot fix - Fine-tuning: adjust every axis manually after the correction - Crop, rotate, flip, and auto-trim the blank edges correction leaves behind - Edit history: every session is saved automatically, so you can reopen and continue any time IMPORT AND EXPORT - Import from Photos, Files and iCloud Drive, or share into GridFix from any other app - Export JPEG, HEIF, PNG or TIFF, at original resolution or a custom size - Everything runs on your device: no account, no network, your photos never leave your phone FREE AND SUBSCRIPTION Every correction tool is free: guide lines, lens distortion, fine-tune sliders, cropping and the live-corrected camera are all fully usable, with unlimited viewfinder time. The limits are only on output: 3 editor exports a day, 10 camera saves a day, both at up to 2048px on the long edge, JPEG, without capture info or location (the capture date and orientation are kept). Subscribing unlocks: - Unlimited exports and unlimited camera saves - Original-resolution export (up to 48MP; the free tier caps the long edge at 2048px) - RAW import (ProRAW, DNG); PNG, TIFF and HEIF export at maximum encoder quality - Full EXIF kept on exports and captures (lens, exposure, location) - Live-corrected video recording (high-bitrate HEVC) GridFix does one thing well: it makes crooked lines straight. No color grading, no filters, no object removal. Available in English, Traditional Chinese, Simplified Chinese, Japanese, Korean, German, French and Spanish. Privacy Policy: https://gridfixapp.com/policy/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is update cadence: GridFix at every 4 days against RAW2HDR's every 2 weeks. RAW2HDR's advantage is iOS requirement (13.0 vs 18.0). On price, ads, in-app purchases and device support 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
Both are free to download. RAW2HDR sells 1 one-off in-app purchase and GridFix sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
RAW2HDR ships an update every 2 weeks, GridFix every 4 days. The most recent releases landed on September 22, 2026 and September 8, 2026 respectively.
| Parameter | RAW2HDR | GridFix |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (4 ratings) — better | — |
| Positive reviews | 66.7% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 2 weeks | Every 4 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 183 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Chris chi-fu HUANG | PEI-CHUN CHAO |
In-app purchases
RAW2HDR
- raw2hdr Pro Unlimited$2.99
GridFix
- GridFix 訂閱(月繳)$2.991 Month
- GridFix 訂閱(年繳)$14.991 Year
- GridFix 終身買斷$39.99









