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Been catching up on my CodeProject daily news and came across your question.
I did some work a couple of years ago on a single-page application written in ember.js and we had a requirement for the application to work in an "offline" mode. Once the user had logged onto the system they could enter offline mode and only offline modules would be available.
We used node.js to host a local rest api that would then be able to access local resources to save the relevant messages/data since we had the same issue with localstorage being cleared and couldn't have our messages disappear. The SPA was then also locally hosted and communicated with the node rest api (we used restify).
It appears as though node.js is available for mobile devices now also so perhaps you could consider something along the lines of a locally hosted web-site that uses the rest api as a store-and-forward mechanism.
The daily Bing image[^], of course
I have an app that puts the image on my desktop's background.
This particular one made me scratch my head.
For a minute there I thought the building had a sticker or a painting of trees on the concrete below it.
The thought even crossed my mind that this was some very poor PaintShop job.
Then I realized there's no concrete at all and what I'm looking at is just the background under a bridge!
Interesting. It appears to be dependent on which end of the train you are looking at. If I look at the farthest end, it's moving away, but if I look at the closest end, it's moving toward me.
"When you are dead, you won't even know that you are dead. It's a pain only felt by others; same thing when you are stupid."
Ignorant - An individual without knowledge, but is willing to learn. Stupid - An individual without knowledge and is incapable of learning. Idiot - An individual without knowledge and allows social media to do the thinking for them.
Interesting concept. By limiting the animation to two frames, each super-imposeable but with alternate coloration, you can see it either way as, without intermediate images there is no implied directionalality.
I have taken some richly colored photos, myself. One, of a (no actual sun, though) sunset (with certain props so it just wasn't yet another sunset) has the sky look like impressionist painting (a side effect the focal point being about 20cm away instead of the sky. Some others, now and then.
But nothing like the eyesores that I see posted every which way. The beauty comes from the subtlety. Nature's particularly good at that.