These terms are the agreement between you and Glyso Ltd ("glyso"), a company registered in England and Wales (company number 17534786). By using the app you accept them. They are written to be read, so please do.
1. What glyso is
glyso is a coaching app for people living with diabetes. It connects to the continuous glucose monitor you already wear, and it uses the readings — together with what you tell it about your meals, your insulin, your movement and your day — to explain what has already happened to your glucose and to help you spot patterns in it.
Concretely, glyso will:
- draw your own glucose curve and the periods you spent in your target range;
- break a meal you describe into its component foods with estimated carbohydrate and other macronutrients, and a glycaemic index;
- measure what each meal actually did to your glucose afterwards, and grade it against your own history;
- name a likely cause of something that already happened — "that overnight rise looks like the dawn effect rather than last night's dinner";
- coach on food, portions, eating order, timing and movement, which is nutrition coaching;
- tell you when something is normal for you, which is often the most useful thing it can say;
- report back your own logged history, including things you have done before ("you usually take five units with this breakfast");
- let you record how you feel — one plain word from a short fixed list, never a rating — and compare the days you logged one word against the days you logged another. Those comparisons describe what happened together; they never claim a mood caused a glucose reading, or the reverse;
- show you an energy score for your day, once it has enough of your own data to know what your normal is;
- answer questions you type about your own record. You ask in your own words; glyso works out which of your own rows to measure, measures them with ordinary arithmetic, and writes a sentence around the result. The AI turns your question into that instruction and writes that sentence. It does not calculate any of the numbers, and it has no way to reach your data or anybody else's. It answers from what has already happened, not from where your glucose is heading. This part of the app opens once we have enough of your own record to say something true.
That is a real product and we are not going to disclaim it into vagueness. It interprets. It makes calls. It is meant to be useful.
2. What glyso is not
glyso is not a medical device. It is not registered, approved or certified as one anywhere, and it must not be used as one.
Specifically, and without exception:
- glyso does not diagnose or treat anything. Nothing in it is a diagnosis, a treatment, or a substitute for advice from a qualified clinician.
- glyso gives no insulin dosing advice. It will never calculate a dose, never suggest a carbohydrate ratio or correction factor, and never pre-fill a dose figure for you to accept. Where it shows a number of units, it is reporting a figure you logged yourself, in the past tense, beside the field rather than inside it. Your doses are decided by you with your clinical team, and by nobody else.
- glyso does not raise alarms and must never be relied on for one. It will not tell you that you are about to go low or high, it does not do crossing-time predictions, and it will not wake you up. Real-time alerts are the job of your CGM's own app — Dexcom's or Abbott's — which is regulated for exactly that purpose. Keep those alerts on. glyso is not a backup for them and is not designed to be one.
- glyso is not a monitoring service. Nobody is watching your readings on your behalf. If the app is quiet it is because it has nothing to say, not because someone has checked.
Your CGM app and your clinical team remain the authority. Where glyso disagrees with either, they are right and glyso is wrong. If you feel unwell, if a reading does not match how you feel, or if something concerns you, treat according to what your team has told you and confirm with a finger-stick test. Do not wait for the app.
3. glyso can be wrong, and here is how
Being specific about this is more useful than a blanket disclaimer.
- Nutrition estimates are estimates. Carbohydrate figures come from public food databases and from an AI reading of what you typed or photographed. They can be wrong, sometimes substantially — a wrongly matched product, a portion guessed from a photo, a recipe that is not the one you ate. Do not dose from a glyso carbohydrate figure without checking it.
- AI-written text can be wrong. The day story, the meal report and the sentence that comes back when you ask glyso a question are generated. They are grounded in your own data and bounded by rules, but they are not a clinician's opinion and they are not guaranteed to be correct. The figures in an answer are glyso's own arithmetic over your own rows rather than the AI's, which is a real difference and not a slogan; the sentence around them can still be clumsy or beside the point.
- Your sensor feed can stop without either of us knowing. glyso reads your readings from your CGM provider through the same interfaces their follower apps use. Those interfaces are not officially published, and glyso is not affiliated with, endorsed by, or connected to Abbott or Dexcom. Either company can change or withdraw them at any time, and if they do, your readings will stop appearing in glyso. Your own CGM app is unaffected.
- Data can be delayed. Readings arrive on a polling cycle of a few minutes, and a stale reading looks a lot like a current one if you are not looking at the timestamp. glyso shows the age of the reading. Believe the age.
- Patterns need history. glyso deliberately says nothing until it has enough of your own data for a statement to be true. Early on, it will be quiet. That is the design, not a fault.
4. Your account
You need an account, and you need to be 13 or over to have one.
Keep your sign-in details to yourself. You are responsible for what happens under your account. Tell us if you think someone else has got into it.
One account is for one person's data. glyso records whether you are setting it up for yourself or for someone you care for, but following another person's readings is not a feature that exists yet — today an account holds the data of the person who set it up.
If you connect a sensor, you confirm that the account you are connecting is yours or that you have the wearer's permission to use it. glyso signs in to your CGM provider as you, and your agreement with that provider still applies in full.
5. What you agree not to do
Do not use glyso to give medical advice to anyone else. Do not try to break, overload, scrape or reverse-engineer the service, or get at other people's data. Do not use it in a way that breaks the law or your CGM provider's own terms.
Do not log content that is not yours to log, and do not log anything unlawful or another person's personal data without their agreement.
We apply rate limits and cost ceilings to keep the service running for everybody. If you hit one, ordinary use has probably not caused it. The question box is one of them: a conversation ends after a set number of messages and a set amount of text, and there is a daily limit on how much AI time one account can use.
6. Your content, and the permission you give us
How glyso handles your data is set out in the privacy policy, which forms part of these terms. The short version: it is yours, you can download all of it, you can delete all of it, and it is not sold or given to advertisers.
Your content stays yours. "Your content" means the things you put into glyso — your meal descriptions and photos, your journal answers, the moods you record, your logged doses and activities, the questions you ask, and your settings. You keep ownership of all of it. We do not claim it.
What you give us is permission to use it. So that glyso can work at all, you grant us a non-exclusive, worldwide, royalty-free licence to host, store, copy, transmit, adapt, analyse and process your content, and to allow our service providers to do the same on our behalf (the providers are listed in the privacy policy). That licence covers three things and no more:
- running the service for you — everything in section 1;
- operating, securing and improving glyso, including diagnosing faults and making what glyso says more accurate;
- producing aggregated and de-identified outputs, as described in the privacy policy under "Aggregated and de-identified data".
The licence over your content lasts only as long as we hold the content. Delete your account and your content goes — your words, your photos, your journal answers, the moods you recorded, your settings and everything identifying — and the licence over it goes with it. It is not perpetual and it is not irrevocable, because those words would not be true of a product with a working delete button.
De-identified records and aggregated outputs are different, and the licence over those is permanent. Two things survive the deletion of your account:
- the de-identified record of what food did to glucose — stripped of your identity, of clock time and of anything you wrote, to the standard set out in the privacy policy under "Delete my account". Please read that section before you decide to log anything; it is the most consequential paragraph in either document;
- aggregated statistics and the models trained on them, where you are not identifiable and there is no way to unpick one person out of an average.
Both are covered by section 7. We are separating them from your content deliberately rather than hiding them inside it, and the privacy policy sets out how to be excluded from either — which has to be asked for before you delete, because afterwards there is nothing left that could be matched to you.
We may sub-license and transfer this permission — to a service provider so it can do its job, and to a buyer if the business changes hands (section 14). We do not sell your content.
7. What is ours
The software and everything behind it belongs to glyso. That includes the app and the backend; the brand, the name, the mascot and the design system; and — this is the part worth spelling out — the rulebooks and the models: the energy score and how it is computed, the glycaemic index tables, the meal-grading rules, the food-effect model, the community meal bank, and the statistics computed across users. None of that is licensed to you beyond your own personal use of the app, and none of it may be copied, extracted or rebuilt from what the app shows you.
The line between your data and our models is worth drawing precisely, because they are easy to confuse:
- Your raw content and your readings are yours. Every row, downloadable in full, deletable in full.
- What glyso works out about you is served only to you. Your food memory, your personal food-effect model, your scores and your stories are derived from your data, are shown to nobody else, and are deleted with your account.
- The de-identified food-and-glucose corpus is ours. What a food did to a glucose curve, once it has been severed from the person it happened to, is a fact about the food. It is retained after an account is deleted, on the conditions the privacy policy sets out, and it is the asset this product is being built on.
- What glyso works out across many people is ours. The aggregate statistics, the population models, and anything built from them. They contain no personal data, you are not identifiable in them, and they are not deleted when an account is — because there is nothing in them to delete. We are stating the ownership rather than leaving it to be argued about later.
The week card is ours, and you may post it. The design, the mark and the wording on it belong to glyso, and the paragraph above would otherwise stop you passing it on. It does not: you may share the card glyso generates from your own week, unchanged, wherever you like, including commercially run platforms. What you may not do is take it apart to rebuild the rulebooks behind the numbers on it.
If you send us feedback, a suggestion or a bug report, we may use it freely and without owing you anything for it.
8. Paying for it
Some features are marked premium. There is no payment system in glyso today and nothing is being charged. If that changes, prices, billing terms and cancellation rights will be set out before you are asked to pay anything, and you will not be charged for something you did not agree to. Your statutory cancellation rights as a consumer will apply in full. If we end the service or your account while you have paid time left, you get the unused part back (section 11).
9. The service can change or stop
glyso is early. Features appear, change and are removed — several have already been. We may change, suspend or discontinue any part of the service, including a feature you rely on, and including the free tier. Where a change is significant and we can see it coming, we will tell you in the app in advance and — if it is a feature holding your data — give you time to export before it goes.
We aim to keep the service running but we do not promise it will always be available, or that it will be free of faults. Your CGM's own app does not depend on glyso, which is the practical reason this is survivable.
10. Liability
Read this section. It is the one that decides what happens if something goes wrong.
10.1 — What we never limit. Nothing in these terms limits or excludes our liability for death or personal injury caused by our negligence, for fraud or fraudulent misrepresentation, or for anything else that the law does not allow us to limit or exclude. That exception is placed first because this is a health-adjacent product and it matters more here than the rest of the section.
10.2 — Your consumer rights are untouched. If you are a consumer, nothing in these terms affects your statutory rights, including your rights under the Consumer Rights Act 2015 that digital content be of satisfactory quality, fit for purpose and as described. We cannot contract out of those and we are not trying to.
10.3 — What glyso is not responsible for. Subject to 10.1 and 10.2, we are not liable for:
- loss arising from using glyso for something section 2 says it is not for — as a dosing calculator, an alarm, a monitoring service, or a substitute for clinical advice. This is the important one. glyso tells you plainly what it does not do, and it cannot carry the consequences of being used as though it did;
- loss arising from a nutrition figure, a grade, or AI-written text being wrong, where section 3 has told you it can be — beyond what the law requires of us;
- your CGM provider changing, withdrawing or blocking the interface glyso reads, or your sensor, phone, network or CGM app failing;
- indirect or consequential loss, and loss of profit, business, contracts, goodwill or anticipated savings;
- loss of data, to the extent it could have been avoided by using the export in Profile → Download my data.
10.4 — The cap. Subject to 10.1 and 10.2, our total liability to you for everything arising out of or in connection with these terms is limited to the greater of the amount you have paid us in the twelve months before the claim and £100. Nothing is charged today, which means the £100 is the figure that currently matters, and we would rather say that than pretend otherwise.
11. Ending it, and what survives
You can end it at any time. Stop using glyso, or delete your account and everything in it from Settings → Help → Delete account. You do not have to tell us why.
We may end it too. We may suspend or close an account that is breaking these terms, that is being used to attack or abuse the service, or where we are required to. Where it is reasonable to, we will tell you first and give you a chance to export your data. Where the reason is serious — an attack, a legal requirement — we may act immediately.
We may also end your account, or withdraw the service from everyone, for any reason, under section 9. If we do, we will give you reasonable notice and a way to export your data first.
If we end it and you have paid for time you have not had, you get that money back. When we close your account or stop the service for any reason other than you breaking these terms, we refund the unused part of any period you have already paid for, worked out day by day. If you paid through the App Store we may ask Apple to make the refund, or make it ourselves. Ending it yourself is covered by the cancellation rights in section 8.
What survives the end of this agreement, however it ends: section 6's licence over de-identified records and aggregated outputs (but not over your content, which is deleted); section 7 (what is ours); section 10 (liability); section 13 (governing law); and anything else which by its nature is meant to continue. Everything else stops.
12. Changes to these terms
We may update these terms. If a change matters — anything affecting your rights, your data, or what you pay — we will tell you in the app before or when it takes effect, not by only changing the date at the top.
If you carry on using glyso after a change takes effect, you accept it. If you do not want to, you can stop and delete your account, and if the change is one that disadvantages you materially you can do that without losing anything you have paid for.
13. The legal bits
glyso is provided by Glyso Ltd, a private limited company registered in England and Wales, company number 17534786. Registered office: 27 Old Gloucester Street, London, WC1N 3AX, United Kingdom.
These terms, and any dispute or claim arising out of them or their subject matter — including non-contractual ones — are governed by the law of England and Wales. The courts of London have exclusive jurisdiction, subject to the paragraph immediately below.
If you are a consumer, this does not take away your local rights. You keep the protection of the mandatory consumer law of the country you live in, and if you live in Scotland, Northern Ireland, or another country whose law lets you bring proceedings there, you can. We will bring any claim against a consumer only in the courts of the country you live in.
Third parties. Nobody other than you and glyso has any right to enforce these terms under the Contracts (Rights of Third Parties) Act 1999.
Severability. If a part of these terms turns out to be unenforceable, it is removed and the rest still stands.
No waiver. If we do not enforce something straight away, we have not given it up.
Entire agreement. These terms and the privacy policy are the whole agreement between us about glyso, and they replace anything said before.
14. Transferring this agreement
We may transfer our rights and obligations under these terms to someone else — for example if the business is sold or reorganised. If we do, your rights under these terms are not reduced, and the privacy policy's section on a change of business ownership applies to your data. You may not transfer your account or your rights under these terms to anyone else.
15. Contact
[email protected] for anything about these terms or the service. [email protected] for anything about your data.
glyso — know the 'why' behind your glucose.