Looking on the internet deeply has found these results:

I added is the most popular phrase on the web.

I have added 1645,000 results on the web	I added 158,700,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Perfect. I have added you have added he has added we have added you have added they have added. Past. I added you added he added we added you added Oct 19, 2010 ... One is a contraction for "I have added" while the other is "I added." The emphasis is in a slightly different place, depending on your usage. Either is acceptable depending on usage: I have added an extra place setting because Aunt Ada is coming for dinner. You could afford the trip if you had added ... I have added a person in past but not accepted.but now she is not able to add me . Sharing & Connecting. Friends. A friend and I didnt add each other in past ...	So I added a few syllables and whatnot. I added a little surprise cocktail to your IV. I added some long I added a little levity to the learning. lasting henna ink. I added some ginger and laurel leaves. Recently, I added something to my list. I added some ranch for zip.

I have added

1645,000 results on the web

I added

158,700,000 results on the web

More popular!

Perfect. I have added you have added he has added we have added you have added they have added. Past. I added you added he added we added you added
Oct 19, 2010 ... One is a contraction for "I have added" while the other is "I added." The emphasis is in a slightly different place, depending on your usage.
Either is acceptable depending on usage: I have added an extra place setting because Aunt Ada is coming for dinner. You could afford the trip if you had added ...
I have added a person in past but not accepted.but now she is not able to add me . Sharing & Connecting. Friends. A friend and I didnt add each other in past ...