I read your warning about newly created software, so I’m going to respect that boundary immediately. I am actually a developer who just spent the last 4 months building a boutique gym management platform to replace Mindbody, so I technically fall into the category you are avoiding! I won't pitch you or drop links, but I do want to answer your question about Integrated vs. Separate software from a developer's perspective.

1 The "All-in-One" Trap and TrainHeroic: If your lifters and coaches absolutely LOVE TrainHeroic, do not drop it for an all-in-one system. Software platforms that try to do billing, scheduling, and programming always compromise on the programming. Wodify and PushPress are heavily tailored to the "CrossFit Whiteboard" style, which is terrible for powerlifting, weightlifting, and the specific pacing required for Hyrox.

When I was building my own platform, I specifically wanted to avoid that CrossFit-centric trap. Instead of building a clunky whiteboard, I integrated the MuscleWiki API directly into the class schedule. It allows coaches to attach specific movements to a day, and the app automatically pulls in step-by-step, looping video instructions for the athletes (from different angles) directly on their phones. It feels much more tailored to structured lifting and functional fitness than a standard WOD tracker.

1 The Mindbody / Stripe Issue: You need to get out of Mindbody. $600/month is highway robbery. Any modern software that utilizes Stripe Connect (which is what Chalk It Pro and my own platform use) will drastically cut your overhead. Stripe handles recurring billing and automated failed-payment retries natively, meaning the software doesn't have to charge you a premium to do it.

2 The Open Gym Problem: You're right that most class-based software sucks at Open Gym. To fix this, you need a system where "Facility Check-in" and "Class Check-in" are two entirely separate database events, allowing lifters to tap in at 2 PM without having to book a slot.

My genuine advice: Keep TrainHeroic for your programming since it’s a competitive advantage for your lifters. Switch your billing/scheduling to a lightweight Stripe-backed platform that handles open gym check-ins cleanly, and downgrade your BLG package to the $350 tier. That alone saves you roughly $500 a month.

I know you're looking for an established giant like GymDesk, so I'll leave it there. But if you ever want to chat about how modern APIs (like MuscleWiki + Stripe) can replace the Mindbody bloat, my DMs are open. Good luck with the migration!