Assalāmu ‘alaikum wa Rahmatullāh,
All praise and thanks are due to Allāh (SWT), who blessed us with the Glorious Qur’ān. Abundant salutations be upon our beloved teacher and role model, the first haafidh, Nabi Muhammad (SAW).
Haafitha vs Haafidha: I have to get this spelling issue out of the way. Both are wrong. “Dh” is actually the transliteration for the letter ذ (thaal) and “th” is the transliteration for the letter ث (thaa). There is obviously no equivalent in the English alphabet for the letter ظ (dhaa) and I refuse to use the standard transliteration equivalent, ẓ, because people actually pronounce the letter as a zaa instead of a dhaa. This is the only down-side of having pretty good tajweed (Alhamdulillah), along with getting a bit edgy when standing behind an imaam with terrible tajweed, (edgy = wanna scream but restrain myself and attempt khushoo’). Conclusion: I opted to go with “dh” ‘cause I noticed it’s more widely used online.