How can friends split payment for a gift online?

Hi,

I am getting ready a proposal for a potential client who will be selling gift items,

I found great gift registry apps; still, one of the functionality that he is looking for is that friends should be able to share a payment;

They want to buy together an expensive gift; usually, one should have to pay the full amount and then collect… instead, each should pay their share (including shipping, etc.) with a link,

I am looking for other options than this app Split ‑ Partial Payments.

Thanks for your help.