What is the best alternative to Sittsy - Pet Sitter & Walkers on iPhone?

Rover - Pet Sitters, S tier, #1 in pet sitting.

Is there a free alternative to Sittsy - Pet Sitter & Walkers?

Yes: Rover - Pet Sitters (S tier, #1) is free, with no in-app purchases.

Yes. 4 apps rank above it in pet sitting: Rover - Pet Sitters (#1), TrustedHousesitters (#2), Wag! - Dog Walkers & Sitters (#3) and more.

Sittsy - Pet Sitter & Walkers is C tier, #5 of the 6 tiered apps in pet sitting. Here is everything that competes with it on iPhone, in tier order.

1
Rover - Pet SittersShigher tier
Free download · ★ 4.9 · 603,488 ratings · score 96
Finds local pet sitters and dog walkers for dogs and cats, with booking, secure payments and updates during stays.
2
TrustedHousesittersShigher tier
Free download · ★ 4.8 · 37,550 ratings · score 95
Connects pet owners with verified house sitters who care for pets at home in exchange for a place to stay.
3
Wag! - Dog Walkers & SittersAhigher tier
Free download · ★ 4.8 · 67,686 ratings · score 82
App for booking dog walking, dog sitting, and dog boarding with local caregivers who are listed as screened.
4
Meowtel: In-Home Cat SittingBhigher tier
Free download · ★ 4.9 · 4,682 ratings · score 79
Connects cat parents with background-checked sitters for in-home cat care, from drop-in visits to overnight stays.
6
Westchase SittersD
Free download · ★ 5.0 · 2 ratings · score 59
Business app from Westchase Sitters to find and manage child and pet care sitters in one place.

What is the best alternative to Sittsy - Pet Sitter & Walkers on iPhone?: Rover - Pet Sitters, S tier, #1 in pet sitting.
Is there a free alternative to Sittsy - Pet Sitter & Walkers?: Yes: Rover - Pet Sitters (S tier, #1) is free, with no in-app purchases.
Does anything rank above Sittsy - Pet Sitter & Walkers?: Yes. 4 apps rank above it in pet sitting: Rover - Pet Sitters (#1), TrustedHousesitters (#2), Wag! - Dog Walkers & Sitters (#3) and more.