CHROIA

Where are my photos saved?

Every photo you capture is saved directly to your device's Photos app, inside a dedicated "Chroia" album. You can find, edit, or share them from the system Photos app.

What's free, and what needs Full Unlock?

Since version 1.4.0, you can preview and adjust all seven mechanisms for free — live and on imported photos. Saving with Photocopy is free; Full Unlock is a one-time purchase that lets you save with the other six: Riso Duotone, Flat Screenprint, Offset Newsprint, Engraving, Mimeograph, and Spot Color Halftone. A PROOF stamp on the preview and a lock on the shutter show when a look needs Full Unlock to save.

Can I use Chroia on photos I've already taken?

Yes (version 1.4.0 and later). Tap the photo button to the left of the shutter and pick a photo — it opens with the same mechanisms, Adjust panel, and a COMPARE before/after split. Tap SAVE to save the print as a new photo in the "Chroia" album; your original is never changed. No extra permission is needed — you choose the photo in Apple's own photo picker.

Is Full Unlock a subscription?

No — Full Unlock is a single one-time purchase ($5.99). There is no recurring charge and nothing to cancel.

How do I restore a purchase?

Open Settings in the App and tap Restore Purchases. Make sure you're signed in to the App Store with the same Apple ID used for the original purchase.

Why does my captured photo look different from the live preview?

Only Offset Newsprint differs: to keep the preview smooth, its live viewfinder shows one representative CMY ink plate, and the full three-plate overprint — plus the intentional plate misregistration — is composited at the moment you press the shutter, so the saved photo can look darker or busier than what you saw live. A small "+ OVERPRINT AT CAPTURE" tag appears on the viewfinder as a reminder. Every other mechanism — including the two-plate Riso Duotone (since version 1.3.0) — previews exactly what is saved.

What does the Misregistration slider do?

Real risograph and offset printing rarely lines up its color plates perfectly — that slight offset is part of the look. The Misregistration slider (available for Riso Duotone and Offset Newsprint) controls how far the plates drift apart — live in the viewfinder for Riso Duotone, at capture for Offset Newsprint; set it to 0 for perfectly aligned plates, or higher for a more visibly "off-register" print effect.

How do I mix my own ink color?

Open Adjust and tap the MIX chip at the end of the ink row, then set H (hue), S (saturation), and B (brightness). Tap DONE to return to the other controls; your last mix is remembered and comes back the next time you tap MIX. MIX is available for every mechanism with an ink color except Offset Newsprint, whose inks are tied to its cyan/magenta/yellow channels.

What do the "LOW CONTRAST" and "TOO CLOSE TO COBALT" warnings mean?

They're hints, not blocks — you can still shoot. LOW CONTRAST means your mix is so pale it's close to the paper tone, so your subject may disappear into the page. TOO CLOSE TO COBALT appears only on Riso Duotone: its second plate is always cobalt, so a mix with nearly the same hue makes the captured duotone read as a single color.

Does Chroia support Camera Control (the physical button on iPhone 16 and later)?

Not in this version — every control is on-screen touch (tap a mechanism in the carousel, tap Adjust for ink color — including your own MIX ink — angle/dot width/misregistration/color threshold), so the app works identically across all supported devices.

Does Chroia capture video?

No — Chroia is a photo-only camera by design. Video capture is out of scope.

What format are photos saved in?

Photos save as HEIC, with the mechanism name used recorded in the photo's EXIF/TIFF metadata.

What languages does Chroia support?

English, Japanese, and Korean (the in-app Japanese and Korean UI arrived in version 1.4.0). The app follows your device's language setting automatically. Mechanism names such as "Riso Duotone" stay in English in every language.

Will my photos be deleted if I delete the app?

No. Your photos live in your device's Photos Library, entirely independent of the App. Uninstalling Chroia has no effect on photos you've already saved.