Battery impact of dark mode in OLED screens

With both iOS and Android supporting dark mode, some interesting analyses on energy consumption savings of dark mode is now available.

Personally, the most interesting takeaway is that dark grey (with significant accessibility improvements) is about as battery efficient as ‘full black’ (which still has some accessibility concerns).

XDA has more to read

The fundamental cause seems to be the energy curve of OLED screens

Energy consumption v luminance

At the recommended 0.3% of luminance of white on a Oneplus Pro screen

Now, barring unique display profile / configuration of the OnePlus Pro screen, this is a good scientific observation (also backed up by 2 real world measurement experiments).

So, wonder why Apple is at least marketing pure black dark mode in the iOS 13 screenshots.

Whatsapp too gets hacked

The end in “end-to-end” sort of hides the fact there are several layers that exist before the data is fully encrypted, in a way that makes it invisible to the transport layer. First of all, you have to type it in to your phone, which exposes what you type to people (or cameras, mind you) around you. Even if your screen is covered, and keyboard, you are still leaking data from your keyboard, both visually and acoustically

But then there’s also the operating system that your app is running on; you simply rely on the fact that your keyboard isn’t logging things as you type them, your camera isn’t recording when it shouldn’t, so on and so-forth. There are a lot of “loose” ends before the end-to-end shrouds your messages in mathematical secrecy. And then, there’s the recipient. In most cases, you have no idea what situation the recipient is in or who he or she might be. For all you care, they might be just broadcasting your texts to the building across from them.

Encryption is just part of the puzzle, it is definitely not panacea.

https://ramblingspace.com/posts/whatsapp-too-gets-hacked/

On one side, I do not want people over at Menlo Park to peer through my chats on Facebook’s WhatsApp nor do I want people in Switzerland to go through my ProtonMail email. I am not sure if they cannot right now, but I know without E2E, they can. I’ll take that side of the deal, and you should too. Similarly, basic encryption protects you from a customs officer at the border having a bad day, or an ex-boyfriend that just wants some dirt. The same argument goes for mitigation dragnet surveillance. Not everyone, yet, can afford NSO Group’s software.

https://ramblingspace.com/posts/whatsapp-too-gets-hacked/

Yet, how do you explain to tens of Indians or Myanmar residents that you simply cannot control people’s behavior, when you are benefiting from the encryption mostly? Apple put on a brave face when it resisted FBI’s attempts, but will it be able to do the same if there was a bigger threat to national security? Will Microsoft? Would we even know that these companies cooperated with the government? If Google tomorrow drops a key logger on your phone, I am not sure if anyone would be the wiser.

https://ramblingspace.com/posts/whatsapp-too-gets-hacked/

iOS and landscape video

There’s simply no way around it — actually watching video using Apple’s native TV app is just an appalling user experience. Here’s how it works: if you’re watching a video on the TV app — presumably, one that you bought or rented on iTunes, streamed through one of Apple’s native partner channels, like HBO or Showtime, or whatever the method for using Apple TV Plus will be — on an iOS device, it will play in portrait. It also looks terrible.

The Verge

I agree that I find a lot more iOS video apps, especially Apple’s default to portrait video when the phone is rotation locked.

Harbour Air to test an all electric sea plane from Seattle

Source

The reason why we don’t have electricity driven planes –

A battery is nowhere near as energy-dense as a liquid fuel. Jet fuel, for example, has a specific energy of 11,890 watt-hours per kilogram. Top-tier lithium-ion batteries currently max out around 250 watt-hours per kilogram. That means you’ll need a far heavier amount of batteries to match the distance traveled with conventional aviation fuels.

Why Harbour Air?

But all of Harbour Air’s routes are less than 30 minutes, so there’s plenty of juice in the current and upcoming generation of batteries to meet the demand for these routes, and the planes don’t have to be quick.
Another consideration is that fuel is often the largest single expense for most airlines. Its price is volatile and spikes can hit small airlines especially hard. Electricity prices, on the other hand, are far more stable.