DisparaTimer vs FilmSlate Mobile

DisparaTimer is a mobile app that, when connected to a Raspberry Pico W/WH, can control the exposure time of a photographic enlarger using a power relay. The physical setup is inexpensive and easy to assemble. DisparaTimer has two operation modes. The first is a traditional timer mode, where you set a specific time for each exposure. The second is designed for creating test strips with constant fractional step increments over a base time. On iPad (iPadOS 17 and later), DisparaTimer includes a landscape-only notes panel that lets you add photos or images of your test strips and make handwritten or visual annotations directly on them.

FilmSlate ends the era of handwritten roll notes, lost negative sleeves, and "what camera did I shoot this on?" THE LOOP 1. Open the app. Type your roll's metadata — camera, film stock, ISO, lens, push/pull, project, notes. 2. Generate a digital slate — a photographable image with the metadata in editorial typography and a high-error-correction QR code at the bottom. 3. Photograph the slate on your film roll. 4. Shoot normally. 5. Get your roll back from the lab. Drag the folder of scans onto the FilmSlate Desktop app (free, at filmslateapp.com) and every image gets EXIF, IPTC, and XMP metadata embedded — Camera, Lens, Focal Length, ISO, Date, Location, Project, Keywords, Artist, Copyright. Lightroom (and Photos, and Capture One) instantly filter the entire roll. One photographed frame. A whole roll tagged. No accounts, no cloud, no monthly fee. WHAT YOU CAN STORE PER ROLL — Camera (Make + Model) — Lens (Make + Model + Focal Length) — Film Brand + Stock — curated catalog of 70+ stocks across 14 brands, plus custom — ISO, with push/pull stops — Project, Roll Name, Date, Location, Notes — Artist + Copyright — auto-stamped on every image in the roll Save reusable presets for cameras, lenses, and film stocks. The New Session form quick-fills from a single tap. SCAN EXISTING SLATES Already photographed a slate? Tap the Scan tab, point your camera at the QR, and it imports as a session on your phone. Useful for shared shoots, lab handoffs, or working across multiple devices. DESIGNED FOR FILM PHOTOGRAPHERS Built to feel like a darkroom apprentice — quiet, exact, and respectful of the craft of analog photography. DOES NOT REQUIRE — An account — A network connection (the QR is a self-contained payload — everything happens on your device) — Cloud storage of your photos (we don't see them) — A subscription LIGHTROOM-READY Every payload field maps to where Lightroom indexes it: Camera filter, Lens filter, Focal Length filter, ISO filter, Date filter, Location filter, Job ID, Keyword List, Creator, Copyright. Filter the whole roll by any combination, immediately, on import. THE COMPANION DESKTOP APP The metadata write-back happens on macOS. Free and simple — download it from filmslateapp.com. Drag-and-drop: drop a folder of scans, the app finds the slate frame, decodes the QR, and embeds metadata into every image in the folder. No subscription, no upload, no telemetry. FOR WORKING FILM PHOTOGRAPHERS If you shoot multiple cameras and film stocks, send to labs or scan at home, and live in Lightroom — this is the metadata bridge between analog and digital you've been keeping handwritten lists for.