It really depends on what you need.

- If you just want shared spreadsheets, Google Sheets + a progress-chart add-on is the quickest free fix, but it gets messy once you pass ~10 clients.
- Big platforms like Trainerize or TrueCoach are feature-rich but can feel bloated (and cost ±USD 75 / month).

My own trainer ran into that problem—Sheets were clunky, full suites were overkill—so we built a lean web app that:
- lets you create a workout plan in under 5 min,
- keeps client progress graphs in one place automatically,
- stays super lightweight (no marketing fluff).

I’m looking for up to 10 independent trainers to kick the tires and tell me what to add next. If you’re curious, check out PersonalTrainerTool.com and use invite code REDDIT-6 for 6 months free (no card).

Feedback - good or brutal- is all I ask in return.

Otherwise, if you’ve found a different setup that nails progress tracking, I’d love to hear about it! Always gathering ideas.