Best Fitness App in the Netherlands and Belgium (2026)

What is the best fitness app in the Netherlands and Belgium?

The best fitness app for someone in the Netherlands or Belgium is one that works in Dutch or French, is priced in euros, treats your health data under GDPR rules, and fits how you train: alone, with a gym, or with a personal trainer. App use is already the norm: 68% of Dutch sporters used an app and/or a device while sporting in 2025, up from 39% in 2016 (Mulier Instituut).

There is no single winner for everyone. This guide gives you the criteria, a comparison of the main app types, and an honest look at what Trainera offers, with its euro prices for both countries.

How many people in the Netherlands use fitness apps?

Two out of three Dutch sporters aged 18 to 80 use an app or a device, according to the Mulier Instituut, the Dutch national sport research institute (published 19 August 2025).

Mulier names no app brands, and we found no comparable official statistic for Belgium. What the numbers do show: apps are now ordinary training equipment, and more than a third of sporters use them to learn exercises, not only to count steps.

What to look for in a fitness app as a Dutch or Belgian user

Five criteria separate a useful app from one you delete after two weeks.

1. Language. The interface, the exercise instructions and the plan itself should be in Dutch, or in French for Brussels and Wallonia. An English-only app works for many people, but exercise cues are easier to follow in your own language.
2. Euro pricing and a real free tier. Look for prices shown in euros including VAT, and check what the free version actually lets you do before you subscribe.
3. Training plus nutrition. Two apps (one for workouts, one for food) mean two subscriptions and data in two places.
4. Exercise videos. A plan with names only ("Bulgarian split squat, 3 x 10") is hard to follow for beginners. Videos for every exercise make a difference.
5. A path to a human. If you ever want a trainer or your gym to see your progress, an app they also use saves you from starting over.

A common mistake is picking the app with the longest feature list. In practice, the app you open three times a week is the one where today's workout is one tap away.

Privacy: why fitness data counts as health data under GDPR

Under the GDPR, data about your health is special-category data, so an app needs both a normal legal basis and a specific condition, usually your explicit consent, to process it.

That follows from Articles 6 and 9 of the General Data Protection Regulation, which applies in both the Netherlands and Belgium. Weight, injuries, medical conditions, pregnancy and often body measurements fall into this category. Biometric data used to identify you is special-category data too.

Before you enter injuries or medical details in any fitness app, check four things in its privacy policy:

• who the controller of your data is (the app, your gym or your trainer);
• whether health data is shared with third parties, such as advertisers;
• how you can export or delete your data;
• whether you are asked for explicit consent before health details are stored.

If you train with a gym or a trainer through their app, they are usually the controller of what you share with them. That is a reason to ask them directly how they handle it.

Fitness app types compared

Most apps people in the Netherlands and Belgium use fall into four types, each good at a different job.

If you use a wearable app for daily activity and want a second app for structured training and food, check that the second one can read your Apple Health or Google Fit data. For more detail on specific needs, see our guides to the best fitness app for beginners and the best app to track workouts and nutrition together.

Which app fits which situation

The right choice follows from how you train today, so here are the most common situations and what to pick.

• You train alone at a budget gym, three times a week. You need a plan with progression and videos more than class booking. A workout app or a coaching app used on your own fits; the gym's own app covers your membership card.
• You run and want to add two strength sessions. Keep your running watch app for runs. Add an app that builds strength sessions around your running days and reads Apple Health or Google Fit.
• You want a meal plan with food rules, such as lactose-free, halal or vegetarian. Look for an app where those rules apply to every meal, not a recipe list you filter by hand.
• You train at home with dumbbells or bands only. Check that the app lets you set your equipment, so it does not program barbell lifts you cannot do.
• You work with a personal trainer, or plan to. Use the app your trainer coaches in. Your plans, check-ins and chat then live in one place, and you do not pay for a second app.

A mistake to avoid: paying for a generic workout app, then hiring a trainer who uses a different app, and ending up with two plans. Ask a trainer which app they use before you subscribe.

What a fitness app costs compared with a gym or trainer

A paid fitness app costs a fraction of a gym membership or a personal trainer, so it is the cheapest form of structured training in both countries.

The full trainer numbers are in the sibling guides on personal trainer costs in the Netherlands and personal trainer costs in Belgium.

Where Trainera fits

Trainera is a coaching platform with a free client app for iOS, Android and web, so the same app works whether you train alone, with a gym or with a personal trainer.

Prices as shown on trainera.fit/pricing for the Netherlands and Belgium (October 2026).

• Languages: the app runs in 26 languages, including Dutch and French, and plans can be written in Dutch or French.
• Library: more than 1,800 exercises with video and more than 1,100 recipes.
• Training alone: on Pro and Premium, TRAI builds and saves training and nutrition plans in your account from what you tell it. Food rules you give it, such as lactose-free, are treated as hard constraints. Replacing an existing plan is confirmed first.
• With a trainer: you use the app free and get the features your trainer's plan includes: plans, check-ins, habits and chat. You can find a trainer on the Trainera marketplace.
• With a gym on Trainera: you get a digital member card with QR check-in. Gym members do not get the TRAI assistant.

What it does not do: it is not a wearable, it does not replace medical advice, and TRAI does not read PDF files or take voice input. On privacy, read Trainera's privacy policy yourself; if you train through a gym or trainer, they are the controller of the data you share with them. More on AI-based apps in our roundup of the best AI fitness apps.

A short checklist for choosing your app

1. Open the app in Dutch or French. Are the exercise instructions translated too?
2. Check the euro price and what the free tier really includes.
3. Look for training and nutrition in one place, with videos.
4. Read how health data is handled and how to delete it.
5. Ask yourself whether you might want a trainer later, and pick an app a trainer can work in.

Try the free version for two weeks of real training before paying. If you are still opening it on day 14, it is the right one.

Start with the free client app in Dutch or French: see Trainera for clients.