What is the best alternative to RoomSync on iPhone?

SpareRoom, S tier, #1 in roommate finding.

Is there a free alternative to RoomSync?

Yes: SpareRoom (S tier, #1) is free to download.

Yes. 4 apps rank above it in roommate finding: SpareRoom (#1), Roomie: Roommates & Rentals (#2), SpareRoom US (#3) and more.

RoomSync is A tier, #5 of 6 in roommate finding. Here is everything that competes with it on iPhone, in tier order.

1
SpareRoomShigher tier
Free download · ★ 4.7 · 4,186 ratings · score 95
Flatshare app for finding a room or a flatmate across the UK, with search tools and customer support by email or phone.
2
Roomie: Roommates & RentalsA
Free download · ★ 4.6 · 10,318 ratings · score 90
App for finding a roommate or listing a room for rent, with verified profiles and location and university filters.
3
SpareRoom USA
Free download · ★ 4.6 · 5,848 ratings · score 89
Free app for finding roommates or room shares across the US, with filters for lifestyle and household preferences.
4
WG-Gesucht - Flats & RoomsA
Free · ★ 4.8 · 2,501 ratings · score 82
Free iOS app for finding or advertising flatshares, 1-room flats, flats and coliving rooms, with search filters and.
6
RoomsterB
Free + IAP · ★ 4.0 · 21,828 ratings · score 80
Free app for finding rooms to rent and compatible roommates in over 192 countries.

What is the best alternative to RoomSync on iPhone?: SpareRoom, S tier, #1 in roommate finding.
Is there a free alternative to RoomSync?: Yes: SpareRoom (S tier, #1) is free to download.
Does anything rank above RoomSync?: Yes. 4 apps rank above it in roommate finding: SpareRoom (#1), Roomie: Roommates & Rentals (#2), SpareRoom US (#3) and more.