Disclosure - I worked at Swype and was part of the acquisition.
https://www.theverge.com/2011/10/06/confirmed-nuance-acquire...
https://techcrunch.com/2018/02/20/nuance-ends-development-of...
Swype was _by far_ the best keyboard for all-screen smartphones, and I miss it very much. It was markedly better than any other swiping keyboard implementation, as well as a substantially better feature set.
If MS silently switched Swype recognition and features into its Swiftkey product, but maybe kept Swiftkey's prediction engine – the only good thing about it – I would be happy to buy it again.
EDIT: Yep- Just checked and downloaded the app & the german language pack successfully, will be fun swiping again. Neither swiftkey or gboard could replicate how good swype used to do it.
But I got an iPhone 6S+ about 3Y ago – and the last time I owned an iPhone was before iOS supported replacement keyboards. After a lot of fussing around, I managed to copy a friend's installation onto it, but every time I restarted the phone, he had to authenticate it with _his_ Apple Store ID and password. Not convenient at all.
Also, AFAICS, the iOS version misses 2 crucial features from the Android version:
• it doesn't seem to have the edit-keys screen, with a cursor square and dedicated keys for delete forwards, delete backwards, cut, copy and paste;
• or the dialling-keypad screen (with the numerals in a phone-style square, as distinct from the numbers-and-symbols screen).
I've not seen any other Android keyboard with these. Some other swiping keyboards now support looping over a letter to double it (very handy in English, which is full of double letters – e.g. "cuter"/"cutter", "planing"/"planning"). I don't think I've seen any others which used swiping upwards off the screen to capitalise a word. Nor can any other I've seen handle swiping down to a punctuation mark to include it and keep going: "cant"/"can't", "were"/"we're", "ill"/"I'll", for example.