Nexo Kinetics vs TrueCoach, Trainerize, Harbiz, Mynter, and Excel: Which Is the Best Software for Personal Trainers?

Introduction

Time is a personal trainer’s scarcest resource. Every hour you spend building Excel spreadsheets, answering WhatsApp messages, or searching for exercise videos on YouTube is an hour you’re not coaching, selling, or resting.

Coaching software exists to solve exactly that problem. But the market is full of options, and choosing the wrong one means paying for features you don’t use, or missing the ones you actually need.

In this guide, we compare Nexo Kinetics with TrueCoach, Trainerize, Harbiz, Mynter, and the classic Excel/Google Sheets, so you know exactly where each one fits.

The Problem With Excel (and WhatsApp as a CRM)

Let’s be honest: most trainers start with Excel. It’s free, flexible, and you already know it. But as you grow, it becomes a problem:

  • Every plan is a separate spreadsheet you have to build from scratch or copy and paste
  • The athlete receives the plan via WhatsApp or email and has no easy way to log their performance
  • You have no centralized history for any athlete
  • If an athlete asks how they’ve progressed over the last 3 months, it takes you 20 minutes to find the answer
  • There is zero connection between assessment data and programming

The Market Alternatives

TrueCoach

TrueCoach is a North American platform very popular among strength and CrossFit coaches. It has a clean interface and a good athlete experience.

  • Price: monthly subscription that scales with the number of clients
  • Exercise library: yes, with videos
  • Athlete app: yes
  • Athlete chat: yes
  • Sports assessment integration: no
  • Test-data-based recommendations: no
  • Load undulation / fatigue management: no
  • Language: English

It’s a good option if you work with English-speaking athletes and don’t need to connect assessments with programming. The price climbs quickly as your client base scales.

Trainerize

Trainerize is a Canadian platform focused on the mass fitness and nutrition market. Widely used by gyms and online trainers.

  • Price: accessible entry plan, scales per client
  • Exercise library: yes, extensive
  • Athlete app: yes, with good notifications
  • Integrated nutrition: yes (differentiator)
  • Sports assessment integration: no
  • Performance-science-based recommendations: no
  • Load undulation: no
  • Language: mainly English

A good option for trainers who also do nutrition coaching. For sports performance coaches, it lacks depth on the programming side and has no connection whatsoever with physical assessment data.

Harbiz

Harbiz is a Spanish-language platform with a presence in the Ibero-American market. It targets the online trainer with a focus on client experience.

  • Price: plans oriented toward the European market
  • Exercise library: yes
  • Athlete app: yes
  • Progress tracking: basic
  • Sports assessment integration: no
  • Science-based recommendations: no
  • Fatigue management / undulation: no

An interesting option for the Spanish market, but without depth on the sports performance side or connection with assessment tools.

Mynter

Mynter is a relatively new platform in the Spanish-speaking market with a focus on user experience and business management.

  • Price: competitive for its local market
  • Payment and finance management: yes (differentiator)
  • Exercise library: yes, with videos
  • Nutrition plans: yes
  • Athlete app: yes, with the option of a branded app of your own
  • Assessment integration: no
  • Data-based training recommendations: no
  • Load undulation / fatigue management: no

Useful if you need to manage billing, nutrition, and client communication in one place. It’s not designed for sports performance programming.

Nexo Kinetics: Built for Performance, Not Just Fitness

The fundamental difference between Nexo Kinetics and all the options above is a single one: Nexo Kinetics connects sports assessment with training programming automatically. No other app in this comparison does that.

Nexo Kinetics helps you create the right plan for each athlete, track their training, and keep them motivated.

Up to 50 Athletes on the Coach Plan

The Nexo Kinetics Coach plan includes up to 50 athletes, and the basic plan up to 10. Compared with platforms that charge per client or raise the price as your base grows, the economics are very clear for growing trainers.

Integrated Load Undulation and Fatigue Management

These are advanced periodization features that normally only exist in high-performance software (at prohibitive prices). In Nexo Kinetics, they’re included in the Coach plan and connect directly with each athlete’s assessment data.

In-App Chat

Communication with the athlete is integrated directly into the platform. No more WhatsApp to send plans, ask how it went, or remind them of sessions. Everything in one place, with training context.

Exercise Library With Your Own Videos From Your Phone

You can upload your own exercises with video directly from your phone, no computer needed, or you can add YouTube videos. Your methodology, your library, your brand. On top of the 400+ exercises included in the platform.

Science-Based Training Recommendations

The Nexo Kinetics algorithm analyzes each athlete’s assessment results and generates personalized recommendations based on scientific research. It’s not a generic suggestion, it’s a prescription based on that person’s real data.

No other platform in this comparison has this functionality. TrueCoach, Trainerize, Harbiz, and Mynter are plan-delivery tools, not data-based plan-generation tools.

Quick Comparison

Summary of the most important points:

  • Nexo Kinetics: Up to 50 athletes on the Coach plan ✓ | Science-based recommendations ✓ | Load undulation ✓ | Fatigue management ✓ | Chat ✓ | Your own videos ✓ | Assessment integration ✓
  • TrueCoach: Price scales with clients | No science-based recommendations | No undulation | No assessment integration
  • Trainerize: Price varies per client | With nutrition | No science-based recommendations | No assessment integration
  • Harbiz: Oriented toward the European market | No science-based recommendations | No assessment integration
  • Mynter: With payment management and nutrition | No science-based recommendations | No assessment integration
  • Excel: Free | None of the above

Who Is Nexo Kinetics For?

Nexo Kinetics is the right choice if:

  • You’re a trainer, physical therapist, or S&C coach focused on sports performance
  • You work or want to work with 10 to 50 athletes and need to scale without losing quality
  • You want assessment data to directly inform programming
  • You need to justify the value of your work with concrete progress data

If your focus is general fitness, nutrition, or billing management, Trainerize or Mynter can complement your workflow. But if you coach with a performance mindset, Nexo Kinetics is the only option in this comparison that closes the full loop.

Conclusion

The software you use isn’t an expense, it’s an investment in the quality of your work and in the time you get back every week.

Nexo Kinetics doesn’t compete only on price or isolated features. It competes on a different concept: that assessment and programming aren’t two separate steps, but one. And that changes the way you coach your athletes.

Turn every test into a training plan

Nexo Jump measures vertical jump, contact time and RSI with millimetre precision — and the software turns that data into programs for your athletes.