Spelling and written tones
Use the dictionary tones, including a mark or number for first tone. For a neutral syllable, leave the tone unmarked or use 5 or 0. For ü, you can enter ü, v or u:.
These answers check Pinyin spelling, not your spoken pronunciation. In nǐ hǎo, both written tones are third tones even though the first is normally pronounced with a rising tone.
Listen uses an installed local Mandarin voice when available. A device voice is a study aid and may pronounce connected-speech tone changes.