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Portion Perception

There is no perfect portion. People eat different amounts. Portion Perception helps you build a good-enough sense of size by looking at reference photographs and making a guess. Choose the version that suits you. You can switch at any time.

Everyday version

For anyone

See a meal, guess whether the portion is small, about right or large, and see how your guesses compare. Nine rounds across breakfast, lunch, dinner, takeaway, drinks and snacks.

Start the everyday version
Diabetes version

If you have diabetes

Practise telling a small, just right, just right for diabetes and large plate apart, spot the diabetes plate, and see it on meals. Use it on your own or with your clinician.

Start the diabetes version

Nothing you do here is saved or sent anywhere. The photographs are generated with AI, for illustration, and every photo includes a standard UK fork and a £1 coin so you can judge scale. This is practice, not advice: always follow guidance from your own care team.

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© 2026 Lumis Enterprise Ltd. All rights reserved. Lumis is a trading name of Lumis Enterprise Ltd. · Privacy Policy Dr Marie-Claire Reville · HCPC: PYL039705 · BABCP: 00001033116 · ICO: ZC154256 · Registered in Scotland

Lumis Enterprise Ltd · Registered in Scotland, company number SC888684 · Registered office: C B C House, 24 Canning Street, Edinburgh EH3 8EG

Therapy sessions are delivered via Circle Psychology Partners, 2a Zenoria Street, East Dulwich, London SE22 8HP · 020 8935 5068 · info@circlepsychologypartners.co.uk. Recognised by Bupa (provider no. 30065233), WPA (provider no. 921583115), Aviva (provider no. 600194123), Cigna Global Health Benefits (provider no. 287975), AXA (provider no. MR05083), and Vitality (provider no. SP129678).

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