Open-source alternatives to Picasa

I want to pick an open-source replacement for Picasa. Below is a list from Open Source Everything (CC BY-SA 4.0), in the order its website shows it. The order is a starting point, not a verdict. - qimgv: qimgv is a free program for looking at pictures on your computer. It is built for people who want a fast, simple viewer that also helps them sort and move photos between folders. [Easy setup; Windows; replaces fully; GPL-3.0; https://github.com/easymodo/qimgv] - digiKam: digiKam is a free program for organizing, sorting and lightly editing large collections of photos and videos on a computer. It is aimed at photographers and hobbyists who want to manage their pictures. [Easy setup; Windows · Mac · Linux; replaces fully; GPL-2.0-or-later; https://invent.kde.org/graphics/digikam] - Gwenview: Gwenview is a free program for viewing, browsing and lightly editing photos and images on a computer. It is made for everyday people who want to look through and sort their picture collections. [Easy setup; Linux; replaces fully; GPL-2.0; https://invent.kde.org/graphics/gwenview] - nomacs: nomacs is a free image viewer that opens most common picture formats, including camera RAW files and Photoshop files. It is for people who want to look through and sort photos on Windows, Linux, Mac and other systems. [Easy setup; Windows · Mac · Linux; replaces partly; GPL-3.0; https://github.com/nomacs/nomacs] - ImageGlass: ImageGlass is a free program for Windows, macOS and Linux that opens and browses pictures on your computer, supporting over 90 image file types. It is aimed at everyday users and designers who want a fast, simple photo viewer. [Easy setup; Windows · Mac · Linux; replaces partly; GPL-3.0-only; https://github.com/d2phap/ImageGlass] Setup rating: "Easy setup" means you can install it like a normal app, use it in a browser. "Advanced setup" means you must run it on your own server or use the command line, or it is a tool for developers. Full details: https://opensourceeverything.org/data/groups/image-viewers.json Before recommending anything, ask me these three questions (one at a time, in plain words): 1) Which device or devices will I use it on (Windows, Mac, Linux, Android, iPhone)? 2) How comfortable am I with technical setup: only installing apps from a store, happy to follow a step-by-step guide, or comfortable with servers and the command line? 3) What is my budget: free only, or willing to pay for hosting or support? Then recommend one to three projects from this list only, and for each say why, using how fully it replaces the app, its setup rating, and the devices it runs on. If nothing on the list fits me, say so plainly instead of stretching.

Read the list of open-source projects at https://opensourceeverything.org/data/groups/image-viewers.json. Compare it with my project or idea below. Tell me which projects overlap, what I could reuse instead of rewriting, and what mine does that none of them do. My project or idea: