Touch-friendly, memory-honest
Why a tab instead of another editor app
App Store collage clones want storage, tracking SDKs, and weekly updates. This studio is the same React component on iPhone Safari, Android Chrome, iPad, Windows Edge, macOS Safari, and Linux Firefox. Bookmark it. You need a network connection to load the page; you do not upload the photographs. Feature parity is literal: slide count, ratios, ZIP export. The layout strip still hides in Carousel mode on every device.
HEIC, Photos placeholders, and fingers
iPhone originals are often HEIC — convert before the picker cooperates. Android camera JPEG usually just works. If Google Photos offers a cloud-only item, wait until it is on disk. Focus pan uses pointer events; a finger works, a mouse is more precise on mixed tight crops. The preview scales the entire strip to fit; that can feel tiny on a phone — pinch the page zoom if you must, but judge composition after export, not from a 4-inch-wide filmstrip thumbnail.
When to hand off to a computer
Sixteen-slide 16:9 PNG capture walks a lot of DOM. Low-power mode plus twenty other tabs is how Safari reloads and you lose the working set (save first). Five-square Instagram packs are a train job. Client 16:9 proofs are a laptop job. We will not ship a “lite mobile editor” that silently drops to 720 px — the canvas is the same, the device is the variable.