Support
A real person reads these. Tell us what happened and what you expected instead, and we will get to it.
Email us
The fastest route, and the only one — we do not have a contact form, because a form would mean collecting your details through a third party we would then have to disclose.
We aim to reply within a few working days. Please include your app version and device model — it saves a round trip.
If it is a medical concern, do not email us
We cannot advise you on symptoms, and we are not qualified to. Contact a doctor or emergency services about severe or sudden symptoms, blood in your stool, unexplained weight loss, persistent vomiting, or anything that worries you. Gutli does not diagnose or treat any condition, and nothing in it is medical advice.
Common questions
How billing works, and what there is to cancel
Nothing. Gutli is sold one experiment at a time — you buy the experiment you want to run, and that is the end of the transaction. There is no subscription, nothing renews, and Gutli will not appear under Settings → your name → Subscriptions, because nothing is billed on a schedule. Payment is taken by Apple through your Apple ID.
Using Gutli on a new device
Sign in with the same Apple ID and everything comes back — what you have paid for is held against your account rather than the device you bought it on. There is no separate restore step and no Restore button, because an experiment is a one-off purchase rather than a subscription for Apple to re-grant.
You paid, but the experiment did not unlock
Open the app again while it has a connection. A purchase that has not yet reached your account is retried automatically, and the payment is not closed off with Apple until it lands — so it recovers on its own rather than being lost. If it still has not appeared after a relaunch, email us with the rough time of purchase and we will trace it. You will not be charged twice.
Delete your account and data
You can delete your account from inside the app. This permanently removes your meals, symptoms, journal entries, beliefs and experiment history. It cannot be undone — ask us for a copy of your data first if you want to keep it.
Get a copy of your data
Email us from the address on your account and ask for an export. We will send your data in a machine-readable format, free of charge, within one month.
An experiment result looks wrong
Tell us which protocol you ran, roughly when it finished, and what you expected instead. Results depend on how completely the days were logged, so it helps to mention any stretch where you know your logging was patchy.
The scanner misread a product
Send us the product name and a photo of the ingredients panel. Food data can be incomplete or wrong, which is why you should always check the packaging yourself if you have an allergy.
Legal
- Privacy Policy — what we collect, and how to have it deleted
- Terms of Service — the agreement you are under
Gutli is operated by Darkmode Ltd, 58 Bramah House, Gatliff Road, London SW1W 8DT, United Kingdom.