Best apps like G21

7+ similar apps compared and reviewed

4.4 avg rating
7 free apps
Updated August 2026
G21
G21
Gravity 21 Fort Lauderdale, LLC

Looking for something like G21? We've analyzed 7+ similar apps to help you find the best alternative. Each app is compared by ratings, features, and real user reviews, so you can make the right choice.

Top Alternatives to G21

Gravity Fitness and Tennis#1

Gravity Fitness and Tennis by Gravity, LLC Idaho

Editor's Choice
💪 Health & Fitness
5.0(2 ratings)
FreeAds
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Gravity Fitness and Tennis screenshot 3

Plan and schedule fitness and tennis classes directly from your mobile device. View class schedules, sign up for sessions, and access club location details. Optimize your time and enjoy the convenience of managing your bookings on the go.