And that's where the problem begins: almost all the available information about training platforms is written by the platforms themselves. Comparisons that happen to be won by whoever published them, feature lists without context, and very few people explaining which criteria actually matter when you're coaching real athletes.
This article tries to be the opposite: a list of criteria, with concrete examples from the market. There's no single right answer — it depends on how many athletes you have, how you work, and how much you want to pay.
1. The pricing model, and how it behaves as you grow
This is the criterion most people ignore, and the one that hurts most two years in.
There are basically two models. Flat subscription — you pay the same whether you have three athletes or thirty. Per-athlete pricing — you pay in proportion to the size of your group.
The difference matters most at the beginning and at the end. A flat fee of €40 a month is irrelevant if you're billing twenty athletes, but it stings if you coach three. Per-athlete pricing protects you at the start, but check whether the rate drops as your group grows: without tiers, reaching forty athletes can cost more than a flat subscription.
In practice, many platforms combine both. TrainingPeaks charges a base fee for the coach account (which steps up past a handful of athletes) and adds a charge for each athlete on a Premium plan, with the per-athlete price falling in larger groups. Final Surge and Today's Plan have their own variants of the same scheme. Good Coach App, the platform we build, has no base fee and charges only per athlete, with the price decreasing past certain thresholds. It's free for two athletes.
What to ask yourself: what do I pay in the first month, with the athletes I have today? And what will I pay if in two years I have three times as many? Do both calculations before you decide.
And a second question almost nobody asks: what happens if the group shrinks? It happens — a coach has a quieter season, or decides to take on fewer athletes because of other professional commitments. If the platform bills tiers annually and you lose five athletes in November, can you drop a tier or do you pay for the whole year?
2. Watch integrations — and who owns the platform
Your athletes use Garmin, Polar, Suunto, COROS, Amazfit, Apple Watch or whatever else. If the watch data doesn't appear in the app by itself, someone will have to enter it by hand — and that someone will be you. And nobody comes out ahead: athletes carry more post-training “paperwork” and you end up with less accurate data.
Check two things. First, which watches sync automatically and whether it works in both directions: having a planned interval session appear on the athlete's watch saves an enormous amount of explaining. Second, how many steps the athlete has to take to connect their account. If the process has six steps, part of your group won't finish it, and you'll be back to copying data manually.
One recent market change is worth knowing about. In July 2026, Garmin acquired TrainingPeaks and TrainHeroic; the platforms continue to operate as a separate business unit within the group. This isn't an alarm signal — Garmin has every incentive for TrainingPeaks to keep working well — but it raises a reasonable long-term question: if your athletes use watches from several brands, do you want your training platform to belong to one of the manufacturers? Maybe yes, if everyone uses Garmin. Maybe not, if your group is split.
Independent platforms don't have that conflict, but they also don't have privileged access to any manufacturer's data.
3. The athlete's experience, which isn't yours
This is the most underestimated criterion on the whole list.
You'll use the platform a few hours a week. Your athlete will open it every day, usually on their phone, often in a hurry before heading out to train. If the athlete app is confusing, slow or ugly, two things happen: they stop logging what they do, and you're left without the information you need to coach them.
Before you decide, create a test athlete account and use it the way they would. Look at the calendar on your phone. Try marking a session as completed. Write a comment. If something is awkward for you, who knows the tool, imagine someone opening it for the first time.
One concrete detail: check whether the athlete can see their plan without installing anything. Some of your athletes won't install an app for you, however much you insist.
4. Your data and your athletes' data
A question worth asking before committing to any platform: where does this data live, and who has access to it? As a coach you collect data about your athletes' health and effort: heart rate, sleep, recovery, sometimes information about injuries. Under data protection law, some of this is especially sensitive — and it's you, not the platform, who normally acts as the data controller. The responsibility is yours, not the provider's.
What to check:
- Where the data is physically stored. If you're in the EU, servers inside the Union mean the GDPR applies directly; with providers outside, check the legal basis for the transfer. If you work outside the EU, check which local data protection rules apply to you.
- Whether the provider offers a data processing agreement. If you operate as a professional and process your athletes' data in someone else's system, that agreement is formally required. Not every platform has one ready.
- What the provider does with the data beyond delivering the service. Do they use it to train models, for aggregate analytics, for marketing? The answer is in the privacy policy — worth reading before, not after.
- Whether the athlete can request deletion of their data, and whether they can do it without emailing support.
- Who else inside the corporate group has access. If the platform belongs to a larger company, it's worth knowing whether data circulates within the group or stays in one product.
These aren't theoretical questions. You're collecting health data about people who trusted you, and you're the one answerable to them for where it ends up.
Another question, increasingly relevant: does the platform give AI assistants access to the data?
More and more training tools offer integrations with AI assistants — via API or through MCP servers — letting a coach ask for a summary of an athlete's last few weeks. It can be convenient. It's just worth understanding what happens then: your athlete's training and health data goes to the servers of an external AI company that was never party to the agreement between the two of you.
If you use an integration like that, you, as data controller, are responsible for making sure the athlete knows about it and that there's a legal basis for the processing. Check several things: whether athlete data is pseudonymised before it reaches the AI provider; what exactly is sent and what stays on the platform; whether the provider trains its models on that data; where the processing takes place; and whether the platform explains any of this publicly. That last point is the easiest to verify and surprisingly revealing — a tool that can't explain what happens to your athletes' data probably hasn't thought about it very hard.
And an uncomfortable one: you can't make exceptions athlete by athlete. If three of your twenty athletes have real concerns about their data, you're not going to coach those three in Excel and the rest in the app. You're not going to run a second system for three people. When you choose a platform, you choose it for everyone — so it's worth choosing one that satisfies the most demanding of them, not the one who doesn't care.
5. How long it takes to build a plan
This is where time is genuinely won or lost.
Serious platforms let you save reusable blocks or templates: sessions you repeat, model weeks, microcycle structures. The question isn't whether these exist, but how many clicks it takes to put a full week into an athlete's calendar, and whether you can duplicate and adjust an existing plan for a similar athlete instead of starting from scratch.
Practical advice: during the free trial, time yourself building a real training week for one athlete. Not a sample one — a real one, with your sessions. If it takes more than fifteen minutes, multiply that by your number of athletes and by four weeks. That number is the real cost of the tool, and it's usually larger than the subscription.
With a good tool you should spend more time configuring it and preparing reusable pieces than repeating the same work over and over afterwards.
6. Communication: inside or outside
Coaching someone also happens between sessions. The athlete writes that their knee hurts, that they've had an impossible week, that they couldn't finish the intervals.
If that conversation lives simultaneously in WhatsApp, in email and in app comments, five athletes make it unmanageable. Some platforms build communication in alongside the training, so a comment stays attached to the session it refers to. Others assume you'll use an external channel.
Neither is wrong — but decide it deliberately, not by default.
7. Language, and who answers when something breaks
If you coach in a language other than English, whether the platform speaks it matters — above all for your athletes, who have no obligation to get by in English. Check that the translation is complete rather than partial: there are tools with a translated interface but with help pages and automated emails only in English.
And look at what support is like. Large platforms have extensive help centres and reasonable response times, but they're unlikely to change something because you asked. Smaller ones usually reply faster and sometimes implement what you suggest. Some manage both. Choose according to what you value more.
8. Analytical depth versus simplicity
Some platforms offer very elaborate load models, fatigue and form metrics, zone analysis and charts for everything. Others stick to the essentials.
More metrics isn't automatically better. The honest question is: how many of those metrics will you actually use to make training decisions? If you coach recreational runners preparing for half marathons, you probably need fewer than you think. If you work with performance athletes and power data, probably more.
A tool that's too complex for your case isn't sophisticated. It's a tool you'll use at 20% while paying 100%.
There are also tools that are simple to use at first, without needing the complicated functions, and that later — when you need it — offer additional options you can switch on.
9. Browser versus phone — for you, not for the athlete
This point deserves a clear warning, and I'll use my own tool as the example because it's the limitation I know best.
Many training platforms, Good Coach App included, are designed on the assumption that the coach works at a computer. Building plans, analysing data and organising groups all work much better on a large screen. In our specific case, the mobile apps have fewer features than the web version: they're good for checking things and for individual tasks, but not for serious planning from a phone. On a phone you simply don't see as much as you do in a browser. Where the phone works well is for quickly adjusting an existing plan and for communicating with athletes. And if you have your templates properly prepared, you can use them to create sessions from the phone quickly too — doing it by hand would be fairly uncomfortable.
If the way you work involves organising training from your phone in the car or between classes, check this specifically before committing. Look at the initial setup as well: once the templates and training zones are in place, is using the phone actually comfortable?
10. How to really test it before deciding
Almost all these platforms have a free trial or a free plan. The usual mistake is using it to “have a quick look”.
A useful test looks something like this:
- Create two or three test athletes, not one.
- Plan each of them a week of training with your usual sessions.
- Connect a watch and check that the data appears in the app by itself.
- Log in as an athlete on your phone and do what they would do: write a summary after a session, leave a quick note on how it went.
- Write to support with a real question and see how long they take to answer.
That's two hours. Compared with two years tied to a tool that doesn't fit, it's very cheap.
Three typical situations
Most coaches fall into one of three situations, and each points to a different kind of tool. If you're starting out with two or three athletes, what matters most is that getting in costs nothing and that you can start without a week of configuration — look for a free tier and simplicity, not an abundance of features. If you coach a dozen or more athletes and it's your main occupation, time is what counts: templates, plan duplication and having communication in one place pay for themselves faster than any difference in subscription. If you work in a club or with a team of coaches, the questions are entirely different: how many coaches the licence covers, whether several coaches can be assigned to one athlete, who sees whose data, and what each additional person on the team costs — this is where pricing models differ most.
In summary
There's no platform that's better than the rest. There's one that fits your number of athletes, your way of working and your budget. If I had to reduce it to a few questions:
- What will this cost me in two years, with the group I expect to have?
- Will my athletes actually use it, or abandon it after two weeks?
- How does the platform protect my data and my athletes' data?
- How long does it take me to build a training week, once the platform is properly set up?
- What is support like? Can I count on quick help for myself or for any of my athletes if I need it?
If those five answers convince you, the rest are details.
Frequently asked questions
How much does a coaching platform cost?
It depends mainly on the billing model. With a flat subscription you pay the same each month regardless of your group size. With per-athlete pricing you pay in proportion, usually with the rate decreasing past certain thresholds. The difference easiest to overlook: whether the platform charges a base fee before you've even added your first athlete. With a small group, it's that fee that determines the bill, not the price per person.
Which platform is best for a coach just starting out?
One that costs nothing with two or three athletes and can be up and running without a week of configuration. At that stage, an abundance of features is only an apparent advantage: you'll use a fraction and pay for the whole. It matters more that the athlete sees their plan on their phone from day one and that watch data comes in by itself.
Is it safe to use AI assistants with my athletes' data?
You can, but you're the one responsible for that processing as data controller: the athlete must know about it and there has to be a legal basis. Before switching on an integration like that, check whether athlete data is pseudonymised before it reaches the AI provider, what exactly is sent, whether the provider trains its models on that data, and where the processing happens. Platforms that explain this publicly have usually thought it through; those that can't answer generally haven't.
Do I need a data processing agreement with my training platform?
If you operate as a professional and process your athletes' data in someone else's system, generally yes. You act as the controller of the athlete's data and the platform as the processor, which requires an agreement between you. Not every provider has one ready or offers it without being asked, so it's worth asking before signing up rather than after.
Do my athletes have to install an app?
Not on every platform, and it's worth checking before you decide. Some tools let the athlete see their plan in a browser, without installing anything. It has a practical consequence: there will always be a group of athletes who won't install the app however much you insist, and an athlete who can't see their plan neither follows it nor tells you how it went.