[gaudat]

yau mou yan taai dak ming lei duen yeh

Hope that keyboard supports this kind of input.

That's what comes to my mind for informal phonetic input of Cantonese.

[inkyoto]

Yes, there is one for iOS: https://apps.apple.com/au/app/%E5%BB%A3%E6%9D%B1%E8%A9%B1%E8...

It uses the British spelling of Cantonese that is still in use in HK for the personal and street name transliteration.

[calyth2018]

tai dak ming. gau ging hai ng hai jyutping, or ng ji.

taai duc ming. gao ging hai ng hai jyutping, or ng ji.