Please mention your device, your app version (Settings → About), your plan, and roughly when the question came up. We reply within two business days: support@lotang.app
Taking a good tongue photograph
Most disappointing readings are really photograph problems. Four habits fix almost all of them:
- Morning is ideal: before eating, drinking or brushing.
- Natural daylight only. Stand by a window. No flash, no yellow indoor bulbs; artificial light shifts the colour the whole reading rests on.
- Relax the tongue. Stick it out fully, without straining; a strained tongue changes colour and shape.
- Straight on, mouth wide. Lips out of the frame, tongue filling the oval guide.
Also: avoid coloured food or drink for an hour beforehand (coffee, beetroot, sweets, coloured medicines), and no filters, no editing, no lipstick.
Looking for quick answers about readings, photographs, plans or your data? They live on the FAQ page.
Report a problem
For crashes or wrong behaviour, please include: what you expected, what happened, the screen you were on, your device model and OS version, and the app version from Settings → About. A screenshot helps enormously.