What is the best alternative to Locker | Shopping Wishlist on iPhone?

GoWish - Your Digital Wishlist, S tier, #1 in wish list.

Is there a free alternative to Locker | Shopping Wishlist?

Yes: GoWish - Your Digital Wishlist (S tier, #1) is free, with no in-app purchases.

Yes. 3 apps rank above it in wish list: GoWish - Your Digital Wishlist (#1), Wishlists - online wishlist (#2), Listful - Wishlist Maker (#3).

Locker | Shopping Wishlist is A tier, #4 of 7 in wish list. Here is everything that competes with it on iPhone, in tier order.

1
GoWish - Your Digital WishlistShigher tier
Free · ★ 4.8 · 195,661 ratings · score 96
A free digital wishlist app for saving wishes from online stores and sharing them so friends and family can reserve.
2
Wishlists - online wishlistShigher tier
Free + IAP · ★ 4.8 · 2,633 ratings · score 93
Saves wishes added in the app or shared from other apps, and lets you browse other people's public wishlists.
3
Listful - Wishlist MakerShigher tier
Free + IAP · ★ 4.8 · 24,210 ratings · score 92
IOS app for saving items from online stores into wishlists that can be shared by link and reserved by others.
5
Giftster: The Family Wish ListA
Free · ★ 4.8 · 19,376 ratings · score 88
Family wish list app for creating and sharing gift lists, marking items as claimed, and running Secret Santa drawings.
6
Wishlist Maker - MoonsiftB
Free · ★ 4.8 · 2,048 ratings · score 75
Free app to collect products from any website into shareable wishlists and gift registries.
7
Giftful - Wishlist & RegistryB
Free · ★ 4.8 · 98,464 ratings · score 72
Saves product wishlists from any online store, compares prices, and lets friends and family privately claim gifts.

What is the best alternative to Locker | Shopping Wishlist on iPhone?: GoWish - Your Digital Wishlist, S tier, #1 in wish list.
Is there a free alternative to Locker | Shopping Wishlist?: Yes: GoWish - Your Digital Wishlist (S tier, #1) is free, with no in-app purchases.
Does anything rank above Locker | Shopping Wishlist?: Yes. 3 apps rank above it in wish list: GoWish - Your Digital Wishlist (#1), Wishlists - online wishlist (#2), Listful - Wishlist Maker (#3).