Choosing personal training software is a decision that directly impacts your day-to-day as a professional. Harbiz and CatalysFit are two relevant options in the Spanish-speaking market, but with very different approaches. This article compares both platforms fairly so you can choose the one that best fits your business.
Quick Summary#
Harbiz is a platform born in Spain, with more than 6,000 professionals using it. Its most notable proposal: it offers a branded app with your own brand for your clients to download. It is established in the Spanish market and has an active community.
CatalysFit is a new-generation platform with artificial intelligence integrated at the core of how it works. It generates periodized workouts automatically from each client's real data, detects plateaus with AI, and offers tools like the Content Studio and Research Feed.
This isn't about which is "better" in the abstract, but which one better matches your way of working.
Comparison Table#
| Feature | CatalysFit | Harbiz |
|---|---|---|
| AI Workout Generation | ✅ Generates complete periodized programs | ❌ Manual creation |
| Intelligent Periodization (macrocycles) | ✅ Macrocycles, deload, 4 phases | ❌ Not available |
| Plateau Detection | ✅ Automatic AI alerts | ❌ Not available |
| Research Feed (PubMed) | ✅ AI scientific summaries | ❌ Not available |
| Content Studio (AI posts) | ✅ Generates social media posts | ❌ Not available |
| Trainer-branded app | ❌ Web portal (no download) | ✅ Native app with your brand |
| Unlimited Clients | ✅ All plans | ❌ By tiers (5, 50 clients) |
| Monthly Price | From €19/month (annual) | From €19/month (5 clients) |
| Exercise Library | 1,358+ with GIF | Included library |
| Multi-language | ✅ 4 languages (PT, FR, EN, ES) | ⚠️ Mainly Spanish |
| Integrated Payments | ✅ Stripe (card) | ✅ Integrated |
| Voice Input | ✅ AI transcription | ❌ Not available |
| Habit Tracking | ✅ Water, sleep, nutrition | ⚠️ Partial |
Where Harbiz Excels#
Let's be fair: Harbiz has real strengths.
Native App With Your Brand#
This is Harbiz's clearest advantage. Your clients download an app that carries your name, your logo, and your colors. For many trainers, this presence on the client's phone screen is an important differentiator. CatalysFit offers a web portal with white-label branding, but not a dedicated native app.
Established Spanish Ecosystem#
With more than 6,000 professionals, Harbiz has an active community in Spain. There is educational content, webinars, and a knowledge base designed for the Spanish-speaking market. If you value an established local community, this is a point in its favor.
Basic AI Features#
Harbiz has started to incorporate AI features into its platform, including assistance for workout creation. While it doesn't autonomously generate periodized programs like CatalysFit, it shows they are evolving.
Where CatalysFit Excels#
AI That Generates Real Workouts#
The most significant difference is AI workout generation. CatalysFit analyzes assessments, weekly check-ins, training history, and each client's goals to generate complete periodized programs — with macrocycles, deload weeks, and phase progression. You review, edit, and approve before the client sees anything.
With Harbiz, programming is still fundamentally manual: you create each workout exercise by exercise.
Unlimited Clients at a Fixed Price#
Here there is an important difference in the business model. CatalysFit charges a fixed fee with unlimited clients on all plans (from €19/month on the annual plan). Harbiz uses a tiered system: the Basic plan (€19/month) allows only 5 clients, and to manage 50 you need the Pro plan at €119/month.
If you have 30 or more clients, the cost difference is considerable.
Plateau Detection and Periodization#
CatalysFit monitors each client's progress and alerts you when someone is stuck, suggesting adjustments. Intelligent periodization generates complete macrocycles with progressive overload. These tools don't exist in Harbiz.
Research Feed and Content Studio#
The AI research feed summarizes relevant PubMed studies for your practice. The Content Studio generates social media posts automatically. These are unique tools that save time in your day-to-day professional work.
Pricing Model#
| Plan | CatalysFit | Harbiz |
|---|---|---|
| Basic | €27/month (unlimited clients) | €19/month (5 clients) |
| Annual | €19/month (unlimited clients) | ~€19/month Basic, ~€119/month Pro |
| Lifetime | €897 (one-time payment) | Not available |
| Free Trial | 14 days, no card | 14 days |
Which One Is for You?#
Choose Harbiz if:
- You value having your own native app with your brand in the app stores
- You have few clients (5 or fewer) and the basic plan is enough
- You want a tool established in the Spanish market
- You don't need automatic AI workout generation
Choose CatalysFit if:
- You want AI to generate periodized workouts that you review and approve
- You have many clients and want a fixed price with no limits
- You value plateau detection, automatic periodization, and research tools
- You work with international clients (native multi-language)
- You want built-in content and marketing tools
Frequently Asked Questions#
Does CatalysFit have a mobile app? Currently, CatalysFit offers a responsive web portal that works on any device without requiring a download. The native mobile app is in development. Harbiz does offer a native app with the trainer's branding.
Can I migrate my clients from Harbiz to CatalysFit? Yes. CatalysFit allows importing client data. You can try CatalysFit free for 14 days without affecting your Harbiz account.
Does CatalysFit's AI replace the trainer? No. The AI generates workout proposals that you review, edit, and approve. Nothing reaches the client without your approval. The philosophy is "AI suggests — you decide."
Does CatalysFit work in Spanish? Yes. CatalysFit supports 4 native languages: Spanish, Portuguese, English, and French. The entire interface, client portal, and content adapt to the configured language.
What happens if I have more than 50 clients? With CatalysFit, there is no limit: all plans include unlimited clients. With Harbiz, the Pro plan allows up to 50 clients; beyond that requires custom negotiation.