Email app Spark adds a lot of new features to its iOS app, while introducing dark mode to its Android app. The iOS app gets rebuilt from the ground up to make it easier to use the app and read through your email threads. Spark adds avatar profile images so you can see at a glance which user or account sent you the message. You can now also customize your most used email actions and flow to the top those you use the most. Android users might not be getting these features yet, but like their iOS counterpart, dark mode is coming. You can read the full list of features available on this link.