SpektraLab for iPhone and iPad

Not a filter.
A print, in your pocket.

Every photo is exposed onto a measured film, developed, and printed on a measured paper, with light traced from 380 to 780 nanometres in 81 steps. On your iPhone and iPad, with no account and nothing collected.

Free · iOS 17 or later · One app for iPhone and iPad · Works offline

SpektraLab on iPad, landscape, in Develop: a harbour town at dusk, with the film and paper cards in the column on the left and the roll on the right.
SpektraLab on iPhone in Develop: the same harbour town, with Print, Decode, Placement, Curve and Format under the thumb.

The darkroom, by hand

Every move, made again from the negative.

A preset moves colours around. SpektraLab moves light: through the film's dye layers, then through the paper's. Grain, halation and the colour in the shadows come out of that process, so every photo responds the way film would.

  • Change the enlarger's colour, the exposure and the contrast, and the whole print is computed again. Nothing stacks.
  • Pick a film and its paper comes with it. Colour negative, slide, cine and black-and-white, each a measured profile.
  • Adjust, Darkroom and Crop each sit on the step of the process that owns them.
SpektraLab on iPhone: a city skyline across the water at night, in Develop.

Film Edge and Date Back

The film itself.

Your frame printed on its own strip: rebate, perforations, edge code and frame numbers, set by format, free for everyone. With Plus, Date Back exposes the date into the negative the way a camera back did, and the edge prints a name of your own.

Film Edge on iPad: the night skyline framed on a 135 strip with its perforations and edge print, and the steps Film, Frame, Edge and Date beside it.
Film Edge on iPhone: the same frame on its strip, with a straighten dial and the picture's size against the film's.
SpektraLab on iPad, landscape, in the Library: All, Photos, RAW, Developing, the Light Table, films, dates and sources down the left, the picture in the middle, the browser on the right.

Built for iPad

Room to look.

Turn the iPad on its side and SpektraLab is laid out like the Mac: the library down the left, the picture in the middle, the browser on the right, and Library, Develop and Edit along the top. The column holds the whole process: Print, Decode, Placement, Curve, Format, Film Edge, Date Back and Effects.

  • One app for iPhone and iPad, with one Plus.
  • The same Library, Develop and Edit as the Mac app, sized for touch.

And the rest of the lab

From the shutter to the light table.

Load a film. Then shoot.

On iPhone, choose the roll before you press the shutter. Every frame lands in your library, ready to develop. Camera Control and the Lock Screen bring you straight to it.

Your photos, where they are.

Open RAW, Apple ProRAW, HEIF and JPEG from your Photos library. The original is never changed: SpektraLab reads it in place and keeps its develops beside it.

Lay it out on the light table.

Your roll at actual size. Pick the keepers the way you would with a loupe.

Two frames. One piece of film. Plus

Half-frame pairs, each side metered, developed and printed on its own.

Exported from the original. Plus

JPEG and HEIF in every colour space at 12 MP are free. Plus exports full size, up to what your device allows, in PNG and 16-bit TIFF too, and the RAWs you bring in.

Private by design.

No account. No tracking. No analytics. Every develop runs on your device, and the app works offline. It goes online only when you buy Plus through the App Store.

SpektraLab Plus

Free to develop. Plus goes further.

Free stays free: every colour film and paper, every Develop and Edit tool, your Photos, Film Edge, the Light Table, 12 MP, JPEG and HEIF in every colour. Plus opens the rest, monthly, yearly, or bought once for good.

  • 48 MP captureProRAW and HEIF at 48 MP, where this iPhone has them
  • Full size, PNG and TIFFUp to what your iPhone or iPad allows · PNG and 16-bit TIFF
  • Files, folders and RAW exportBring in from Files and your disks; export the RAWs you bring in
  • Your words on the film edgePrint your own name for a film along its edge
  • Date BackA date exposed onto the negative, every face
  • Half-frame pairTwo frames side by side on one piece of film
  • SpektraLab's black and whiteFour black-and-white films of our own, more to come
  • ExperimentsRemove the anti-halation layer, and what comes next

SpektraLab for iPhone and iPad

Version 1.2.1 · Free

iOS 17 or later. One app for iPhone and iPad, built on the same mathematics, with an engine reimplemented for mobile.