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The official Gain & Sustain Fitness online coaching app. Everything you need under one roof.
* App access requires paid coaching plan
Terms of use: https://kahunas.io/terms-conditions
Privacy policy: https://kahunas.io/privacy
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What's New in GSF
2.7.1
June 16, 2025
Reply faster with swipe-to-reply. Check-ins, workouts, and food logs are smoother than ever. This one’s all about better flow.
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Monthly Coaching
Monthly Subscription
$300.001 Month
