There are a handful of clever developers who have come up with ways to do this example. Source: over 1 year ago

This doesn’t mention the API used, and the best Google gives me (via https://stackoverflow.com/questions/18680028/prevent-screen-capture-in-an-ios-app) is https://developer.apple.com/documentation/uikit/uitextinputtraits/1624427-issecuretextentry: “A Boolean value that indicates whether a text object disables copying, and in some cases, prevents recording/broadcasting and also hides the text.” ⇒ it seems... - Source: Hacker News / over 1 year ago

Here's a SDK that prevents screenshots, it does seem like you need to contact them for access though. https://screenshieldkit.com. Source: over 2 years ago

JPEGLI = A small JPEG The suffix -li is used in Swiss German dialects. It forms a diminutive of the root word, by adding -li to the end of the root word to convey the smallness of the object and to convey a sense of intimacy or endearment. This obviously comes out of Google Zürich. Other notable Google projects using Swiss German: https://github.com/google/gipfeli perceptual JPEG encoder Guetzli = Cookie... - Source: Hacker News / 2 months ago

A JPEG encoder developed by Jyrki Alakujala, Robert Obryk, and Zoltán Szabadka, and released by Google in 2017. Guetzli specializes in high-end image quality where it is claimed to produce significantly smaller files than prior encoders at equivalent quality, albeit at very low speed. It is named after the Swiss German expression for biscuits, in line with the names of other compression technology from Google.... - Source: dev.to / over 1 year ago

I'm a huge fan of AV1 for video, but for images JPEG-XL is simply the better codec than AVIF. If you've not actually looked closely at a comparison and are just on the side of AVIF in this debate because it's based on AV1 (and maybe you hate HEVC / HEIC), I'd urge you to look closer. Jpeg XL is pretty unrelated to Jpeg, Jpeg 2000 and Jpeg XR and instead a successor of Google Guetzli, FLIF and newer research. Source: over 1 year ago

Guetzli. Looks like development has stalled? Perhaps for just that reason. https://github.com/google/guetzli. - Source: Hacker News / almost 2 years ago

I've never had much luck using jpegoptim. In most cases it's only removing the metadata, which isn't much on high-res files. Guetzli is nice, if you don't have too many images to recompress (quite slow): https://github.com/google/guetzli. - Source: Hacker News / almost 2 years ago