What is the best alternative to Imposter Game - Who's the Spy? on iPhone?

WePlay - Game and Party, S tier, #1 in spy party game.

Is there a free alternative to Imposter Game - Who's the Spy??

Yes: WePlay - Game and Party (S tier, #1) is free to download, with in-app purchases.

Yes. 2 apps rank above it in spy party game: WePlay - Game and Party (#1), Spy: Find the Imposter (#2).

Imposter Game - Who's the Spy? is S tier, #3 of 8 in spy party game. Here is everything that competes with it on iPhone, in tier order.

1
WePlay - Game and PartyS
Free + IAP · ★ 4.6 · 245,890 ratings · score 95
Free party game app with voice interaction and casual multiplayer games like Who's the Spy, Space Werewolf, Mic Grab.
2
Spy: Find the ImposterS
Free + IAP · ★ 4.8 · 10,098 ratings · score 94
A social deduction party game where players pass one phone to find the spy hidden among them, using a shared secret.
4
Imposter Game - FakeitS
Free + IAP · ★ 4.7 · 27,253 ratings · score 91
A social deduction word game where most players see a secret word and the imposters must bluff, hint, and vote them out.
5
Imposter Who? - Word GameA
Free + IAP · ★ 4.8 · 31,260 ratings · score 89
A party word game where one player is the imposter and must bluff without knowing the secret word.
6
Imposter Game - Party EditionA
Free + IAP · ★ 4.8 · 94,182 ratings · score 87
A party word game where one player secretly gets only IMPOSTER and bluffs while the others give clues and try to find.
7
Undercover™: Word Party GameA
Free + IAP · ★ 4.8 · 3,182 ratings · score 85
A group word game where most players share a secret word and a few have a different word or none, and everyone tries to.
8
Out of the LoopF
Free + IAP · ★ 4.8 · 15,343 ratings · score 50
One-phone party game for 3 to 9 players where one player is Out of the Loop and must work out the group's secret word.

What is the best alternative to Imposter Game - Who's the Spy? on iPhone?: WePlay - Game and Party, S tier, #1 in spy party game.
Is there a free alternative to Imposter Game - Who's the Spy??: Yes: WePlay - Game and Party (S tier, #1) is free to download, with in-app purchases.
Does anything rank above Imposter Game - Who's the Spy??: Yes. 2 apps rank above it in spy party game: WePlay - Game and Party (#1), Spy: Find the Imposter (#2).