Your daily companion

Get your results fast on your smartphone and stay on track about your individual data


Why you choose BESTZEIT?




The features in detail

Fueling strategy

Sodium strategy

You will see your individual sodium concentration in mg/l. We can determine your personal value with our Sweat Pack.

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Fluid recommendation - during

For during your training/race we will give you a recommendation on how you have to adapt your drinking behaviour.

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Fluid recommendation - after

After training is before training. You will get an individual post load recommendation for the amount of how much you've to intake.

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Carbohydrate Combustion

Analysis BIKE / RUN

Get even better nutrition recommendations based on your real values by easily integrating the carbohydrate tests into your training to determine your individual carbohydrate requirements.

With the results, your fueling recommendations in the BESTZEIT app become even more accurate.

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Enter extern data

If you have already done a test in a labor we provide you an integration of your existing results (e.g. VO2max, Vlamax...) to continue with these values and to keep your previous investment.

You also can integrate your INSCYD data.

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Carbohydrate strategy

Based on your individual carbohydrate combustion we will give you a personal fueling strategy (adapted to your personal sodium loss) on how you have to customize your fluid supply.

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Sweat Pack

Register / Connect

To get your shipment label register your sweat diagnostic kit on our website with your SWEAT-ID or with the QR-Code in our App.

You can find your individual SWEAT-ID above the QR-Code on the black sticker in your sweat diagnostic kit.

In our shop you can get your sweat diagnostic kit to get started:

Get your sweat diagnostic kit
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View results

After your first training you will instant see the result. You can train as much as you want and track every session.

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Integrations (coming soon)

Leading partners / manufacturers

Coming soon: In the future it will be possible to connect our App and your individual data to multiple devices of e.g. leading sports watches and biosensor manufacturers.

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Download the App now in your Appstore




Find your Plan

Three different plans - adapted to your personal level


Best to start

only our app is required


  • Hydration recommendation before & after training
  • Uses rules of thumb
  • BESTZEIT app as your daily companion

  • Onboarding call with one of our experts
  • payment: not required
  • cancellation: not required


More information


Best for short term goals



  • Everything in 'free'
  • Uses artificial intelligence
  • Nutrition recommendation before & after training
  • Personalized pacing strategies
  • Integrates your own metabolic parameters like VO2max and Vlamax

  • Not tested in a lab? Possibility to buy physical test kits on demand and integrate the results
  • payment: monthly
  • cancellation: monthly

19 € per month

More information


Best for continous improvement



  • Everything in 'medium'
  • Holistic fueling & pacing strategy for your race day
  • Fundamented on the race course profile
  • Hydration & nutrition advices based on your test results
  • Targeted preparation aligned with your training plan
  • Continuous performance monitoring including a personalized test plan

  • Includes physical test kits to cover your entire training season on individual data
  • payment: monthly
  • cancellation: yearly

49 € per month

More information

Frequently Asked Questions

Is it really free?
The starter version is really free and it allows you to create unlimited test sessions to create your individual sweat profile.

Depending on your needs we offer additional plans ending up in the IRONMAN® plan - within that you can relax and focus on your training itself. We cover the part of your fueling - regardless of your nutrition supplier.

You'll find a free plan in our Plans & Pricing.
How can I integrate my results in the app?

An integration screen in the app is coming soon. Just type in your values and we will use them in the background for our calculations.

No time to wait? No problem. Just send us an email. We will directly integrate your results.

Get more information about the App

What is the sweat pack?

With our sweat diagnostic kit, the Sweat Pack, you can easily analyze your sweat during your workout.

The composition of sweat varies from athlete to athlete. Sweat consists of 99% water and is primarily used for thermoregulation. Sodium is dissolved in it and is the most important electrolyte in the context of substitution.

The sodium content varies between 200mg and 2300mg per liter of sweat.

The basis of the Sweat Pack is a scientifically validated method which was designed for sweat analysis in the field and further developed by us.

How does the sweat diagnostic kit work?

In your sweat kit you can find a flyer with further instructions about wich steps you should pass to get your personal sweat analysis. For more details you can take a look in our 'How to use the sweat kit'.

What is your individual sweat profile?

If there is a major, unbalanced sweat loss, your blood volume decreases. The blood becomes more viscous and the oxygen transport to your muscles is reduced. Already from a sweat loss of more than 2% of your body weight, your body therefore limits its performance.

Depending on the type of sport, indoor or outdoor and under very warm conditions, your sweat flow can be up to 4 liters per hour.

We will take all the parameters into account to get the most individual support as possible. In our App you can figure out your individual sweat profile.

How can the App help me?

The app supports you in creating your individual sweat profile. Based on that we will create your fueling strategy.

Considering your individual energy demand, your race course and your sodium loss in correlation, we will be able to provide you a 100% individual pacing strategy.

The BESTZEIT app is a new way to sum up your pains in the fourth discipline and break your personal best. 

Download the App here!

What is the best time for testing?

We recommend to test at the beginning of your training cycle before your main / high intense training phase as you come closer to race day.

The perfect timing for your last test would be 2-3 weeks before your final raceday.

Should I book a plan?

Nutrition out of mind in training & in competition.

With our individual plans, we cover your back in the issue of nutrition regardless of your nutrition supplier.

You'll have no risk with a low monthly payment.

For more information check our Plans & Pricing

What is the carbohydrate combustion?

The amount of energy you have stored in the form of carbohydrates in muscle & liver glycogen is biologically limited. 

Your carbohydrate combustion is the connection between your recommended carbohydrate intake and your power output, depending on your training level, your current threshold, VO2max and much more.

We can show you how much carbohydrates you'll need aligned to your current power output.

For your raceday, we will create a 100% customized fueling and pacing strategy based on your own and individual data.

You can get more information about the procedure in our Carbohydrate Test section.


Is my data safe?

BESTZEIT is a company in the Southwest of Germany. We are subject to german data protection regulations.