Clients following a plan built by a registered dietitian or nutritionist.
The client app for your nutrition, health & fitness journey
CalorieScience Companion is the client-facing companion to the CalorieScience practice platform. Once your dietitian, nutritionist, health coach or fitness professional invites you to connect, everything they set up for you — meal plan, sessions, questionnaires and progress tracking — is available in a single app on your phone.
Built for clients working with a professional
CalorieScience Companion is for individuals who are actively working with a nutrition, health or fitness professional, not a general calorie-counting app for the public.

How clients connect with their professional
Your dietitian, nutritionist, health coach or fitness professional sends you an invitation from their CalorieScience account. Accepting it links your app to their practice, so your plan, sessions and messages stay in sync automatically.
- Secure, invite-only connection to your professional
- Book, confirm and reschedule sessions in the app
- Review program invoices and payment status

Meal plan access, always up to date
Your meal plan appears in the app exactly as your professional built it, with meal timings, portions and macros. Whenever they update your plan, the app updates too.
- Daily meals with calories, protein, carbs, fats and fiber
- Recipe steps, ingredients and photos for every meal
- Automatic updates when your professional revises your plan

Track food, macros, symptoms and progress
Log meals and macros against your daily targets, note symptoms between sessions, and watch your weight and biomarker trends move over time, so your professional always has the full picture.
- Food and macro tracking against your personalized targets
- Symptom notes your professional can review
- Weight and goal progress charted automatically

Upload lab reports in seconds
Photograph or upload a lab report directly from your phone. Your professional can review your biomarkers, like glucose, HbA1c, thyroid markers and vitamin levels, and factor them into your plan.
- Upload reports as a photo or PDF from your device
- Biomarkers stay attached to your progress history
- Shared only with the professional you're connected to

Invoices and program details, on the go
Keep track of invoices, payment status and your nutrition program details without leaving the app.
- Review and download invoices from your professional
- See your program, payment status and due dates
Your health data, protected
CalorieScience Companion only shares your data with the professional you're connected to. Nothing you upload is visible to anyone else.
Encrypted & access-controlled
Your data and your lab reports are encrypted in transit and at rest, with access limited to your connected professional.
UK & EU GDPR compliant
CalorieScience is built to UK and EU GDPR standards. HIPAA compliance is in progress.
Invite-only access
You only appear in the app connected to the professional who invited you — there are no public profiles.
CalorieScience Companion is a workflow and tracking tool that supports the guidance of your dietitian, nutritionist, health coach or fitness professional. It is UK and EU GDPR compliant; HIPAA is in progress. It is not a diagnostic tool, not a medical device, and does not replace clinical assessment by a qualified practitioner.
How to download and access the app
Get invited
Your dietitian, nutritionist, health coach or fitness professional sends you an invite from CalorieScience.
Download the app
Install CalorieScience Companion from the App Store. Android is coming soon.
Sign in & connect
Sign in with your invited email to connect your account and access your plan.
Frequently asked questions
CalorieScience Companion is the client app for CalorieScience. It connects you with your dietitian, nutritionist, health coach or fitness professional so you can access your meal plan, track your food, macros, symptoms and progress, and upload lab reports, all in one place on your phone.

