What is the best alternative to 7 Minute Workout on iPhone?

HIIT | Down Dog, S tier, #1 in hiit workouts.

Is there a free alternative to 7 Minute Workout?

Yes: HIIT | Down Dog (S tier, #1) is free to download, with in-app purchases.

Yes. 1 app ranks above it in hiit workouts: HIIT | Down Dog (#1).

7 Minute Workout is S tier, #2 of 7 in hiit workouts. Here is everything that competes with it on iPhone, in tier order.

1
HIIT | Down DogS
Free + IAP · ★ 4.9 · 48,360 ratings · score 97
Generates HIIT workouts from over 1000 exercises, with adjustable length, intervals, difficulty and music.
3
Daily Cardio Workout - HIITA
Free download · ★ 4.7 · 1,917 ratings · score 88
Free app with two 5 to 10 minute cardio workouts, with video demonstrations, an on-screen timer, and offline use.
4
HIIT • Workouts & TimerA
Free + IAP · ★ 4.8 · 31,087 ratings · score 85
Free HIIT workout app with 4-minute Tabata interval workouts, custom timers, and progress tracking.
5
Barry’s X: Best HIIT TrainingB
Free download · ★ 4.9 · 2,197 ratings · score 79
Free Health & Fitness app with on-demand cardio, lifting, and stretch workouts led by Barry's instructors.
6
Keelo - Strength HIIT WorkoutsC
Free + IAP · ★ 4.8 · 5,977 ratings · score 67
Free strength and conditioning app with personalized workouts, HD demo videos, and optional paid Premium coaching.
7
7 Minute Workout ChallengeF
$3.99 · ★ 4.7 · 5,940 ratings · score 43
Guides a 7-minute workout of 12 bodyweight exercises, each done for 30 seconds with 10-second rests, with no equipment.

What is the best alternative to 7 Minute Workout on iPhone?: HIIT | Down Dog, S tier, #1 in hiit workouts.
Is there a free alternative to 7 Minute Workout?: Yes: HIIT | Down Dog (S tier, #1) is free to download, with in-app purchases.
Does anything rank above 7 Minute Workout?: Yes. 1 app ranks above it in hiit workouts: HIIT | Down Dog (#1).