Last updated 30 September 2026
A tool for photographing and recording your own hair over time. It stores what you give it and shows it back to you. It is not a medical device, it does not diagnose anything, and nothing in it is medical advice. For anything clinical, speak to a qualified healthcare professional.
Tress is for adults: you need to be 18 or over to use it.
Once you say yes to reading with AI, some of what Tress shows you is written by an AI model: parts of your scan report, the wording of your hair guide, the illustration on the Premium screen and the answers from Tress AI. A model can be wrong, can miss things and can describe a photograph badly. What it writes describes photographs and your record; it is not a diagnosis, not a prediction and not medical advice. Check anything that matters to you with a qualified healthcare professional. If something it wrote or drew is offensive, harmful or wrong, tap Report beside it and tell us, without leaving the app; the privacy policy says what a report sends.
Tress Premium is a monthly or yearly subscription, and the app is used with it. Your first scan, its report and the first card of your hair guide are free; after them, the app asks you to choose a plan before you carry on. Premium covers every scan after your first, your routine, setting two scans side by side, your report as it grows from one scan to the next, your whole hair guide, your journal and Tress AI. It does not buy a result. Whether anybody’s hair changes depends on why it is changing and what they do about it, and no app can promise otherwise.
Where your store offers you one, a plan can start with a free trial; the Premium screen shows its length and the price that follows it before you start. Nothing is charged during the trial. When it ends, the plan you chose starts and your store account is charged its price, unless you cancel at least 24 hours before the trial ends. If you cancel during the trial, you are not charged and Premium ends when the trial does. Your store decides who can have a trial, usually one per person. If notifications are on, Tress reminds you two days before a trial ends.
Subscriptions are billed through your App Store or Google Play account, not by us. They renew automatically at the end of each period unless cancelled at least 24 hours before it ends, and your account is charged for renewal within 24 hours of the period ending.
You can manage or cancel your subscription in your App Store or Google Play account settings at any time. Cancelling stops the next renewal; access continues until the period you have already paid for ends.
Purchases are handled by Apple and Google, so refunds are theirs to grant. Requests go through the store you bought from, under that store’s policy.
Your photographs and notes are yours, and we claim no rights over any of them. They are kept on your phone. Some of what you record can also be sent elsewhere so that the app can do its work, and each case is in the privacy policy: once you say yes to reading with AI, a few frames of each scan, your answers and readings as words, your messages to Tress AI, and one scan photograph for the illustration on the Premium screen go to a server of ours and on to Google’s Gemini API to be read, worded or redrawn; and where your version of Tress has backup and you say yes to it, a copy of your record is kept in your Tress backup, with your photographs in it only if you switch that on. We use all of it to run the app for you, including that illustration on the Premium screen — not to target advertising at you, not to train anything of ours, and not for any purpose you have not asked for. What Google does with what it receives is governed by the terms Google publishes for that API rather than by these, and we make no promise here on its behalf. A photograph you hand to a share sheet goes wherever you send it. If your phone backs itself up, the photograph files can go into that backup; it is held under your own Apple or Google account, on your terms with them, and not by us.
Delete the app and what it kept on the phone goes with it. “Delete all my data” in Settings — “Delete my account and data” where you have a Tress backup — removes your photographs and records from the phone and from your Tress backup, and deletes the account the backup was kept under; it leaves a few device settings behind, and the privacy policy lists which. Deleting the app on its own does not delete a Tress backup. A backup your phone makes is your own copy, and you clear it in your phone’s backup settings. Once the app has connected to our subscription provider, on iPhone or on Android — because you opened the paywall, bought, or tapped Restore — that provider holds a purchase record against a random identifier for the install; write to support@tresshaircare.com and we will help you have it deleted. Deleting your data does not cancel a subscription: that is done in your store account.
Tress is made and published by Arslan Ahmad, an individual developer, who is the seller named on its App Store and Google Play listings. support@tresshaircare.com reaches him, and a person reads it. The purchase itself is a contract with Apple or Google; these terms are about the app.
Nothing in these terms takes away or limits the rights you have by law as a consumer where you live.
If these terms change in a way that affects what you have paid for, the change applies from your next renewal rather than retroactively.
Tress is a tracking and documentation tool. It is not a medical device and does not provide medical advice.