Flashback

What this is

A film-look RAW editor for the Flashback One35 v2. It decodes your DNG, applies a film "stock" (a colour LUT) plus optical effects, and exports a finished JPEG or 16-bit TIFF. Everything runs on this device — your photos never leave the phone, and it works fully offline once installed.

Film vibes

Pick a stock from the strip at the bottom. Each is a different look:

• Natural — the developed raw, nothing added: no film look, no effects, no exposure lift. Just your exposure, white balance and tint. This is the default and the truest starting point.
• Gold — built-in warm, saturated film-style grade. An original interpretation — for an exact look, import a .cube via the ＋ button.
• Disposable — punchy, contrasty, heavy grain & vignette.
• Point & Shoot — balanced consumer-film look, gentle grain.
• Rangefinder — clean, fine-grained, restrained.
• Monochrome — black & white with strong grain.

Tap ＋ to save your current look as a preset or import a .cube LUT. Tap a custom preset to load it; press and hold it to delete.

Custom LUTs: tap ＋ → Import LUT to import a .cube file. It appears as a ◆ pill and replaces the current vibe's colour transform (effects stay). Press and hold the pill to delete.

Date stamp: toggle under Effects to burn the photo's capture date into the corner, 2000s-camera style. Applies to the preview and JPEG exports (TIFF stays clean).

Adjustments

• EXP — exposure (brightness), in stops.
• TEMP — white balance, cooler ↔ warmer.
• TINT — green ↔ magenta balance.

Effects (tap “Effects”)

• Grain — film grain texture.
• Halation — red/orange glow bleeding from highlights.
• Chrom. Ab. — colour fringing toward the frame edges.
• Softness — gentle overall blur.
• Sharpen — local contrast / edge crispness.
• Vignette — darkening toward the corners.
• Bloom — soft glow spreading from bright areas.
• LUT — the film colour transform itself (off = neutral).

Gestures

• Tap the photo — hide / show the controls (zen).
• Press & hold the photo — peek at the un-edited original.
• Pinch — zoom in; drag to pan; double-tap to fit.

Photo strip (multiple DNGs)

Opening several DNGs at once shows a filmstrip above the controls. Each thumbnail remembers its own profile, adjustments, crop, and rotation — switch between photos and your edits stay put. A small badge on each thumbnail shows which film vibe it's set to.

• Tap a thumbnail — switch to that photo (instant if you've viewed it before in this session).
• Long-press a thumbnail — exclude/include it from the batch export. Excluded photos dim and show a small ✕.
• Swipe up on a thumbnail — remove it from the queue entirely (asks for confirmation first). This only removes it from this session — it does not delete the file from your device.
• Apply adjustments to all photos (under Effects) stamps the current photo's profile, exposure, WB, and tint across the whole roll (rotation and crop stay per-photo).

Exporting

• JPEG — 8-bit, great for sharing. Quality is adjustable under Effects.
• TIFF — 16-bit, best for further editing.
• Both export at full resolution. Saving opens the share sheet — pick Save Image (Photos) or Save to Files.
• The Batch button develops every included photo (see Photo strip above) — each with its own profile and adjustments — then saves them together in one share sheet. The button label shows how many are included, e.g. Batch 4/6.

Getting photos onto the phone

Connect the One35 v2 via USB-C, copy the DNGs into the Files app (or iCloud Drive), then tap Open. Safari can't talk to the camera over USB directly.

Privacy & offline

All decoding and processing happen on your phone's GPU. The app only ever downloads its own code once; after that it runs offline. No account, no upload.

Credits

A browser port of the original flashback-raw-editor by lofilogic (Python + PySide6 + WebGPU), rebuilt as a Progressive Web App by deknared. Source code is published under the GPL-3.0 license.