The awkward question, solved. A free app that makes being tested the normal thing to be.
Flex Technologies Group Ltd · Bromley, UK · September 2026
Take the test. Check the text. Enjoy the sex.
The barrier to safer sex isn't the test. Tests are free, postal, ten minutes, results by text. The barrier is the conversation — and it happens at the worst possible moment.
Source: UK Health Security Agency, sexually transmitted infections and screening for chlamydia in England, 2025 report, published 2 June 2026. Diagnoses fell 8.3% on 2024 while sexual health screens stayed flat at 2.36 million a year. Fewer tests, not fewer infections, is the risk.
Public health has spent decades making testing easier. We make being tested visible — quietly, only to the people it matters to — so it becomes the socially rewarded state.
Free postal kit or clinic. Upload the result. The app matches the name to your ID and the date to the calendar. That's your green tick, valid 90 days.
Type in your date's number. If they also hold a valid tick, you see it. If not, you see nothing — and nothing means nothing.
They never know you looked. No notification, no record, no conversation. Everybody has a better evening.
You cannot look until you have been tested. That one rule puts a different pressure on each side, and neither side has to be persuaded of anything.
Behavioural design, not education. Persuasion has never got people to eat well, exercise or test. A quiet mechanism that makes the tested state the norm can.
Women aged 18–30 who date on apps. They carry the anxiety and the consequences, and they tell each other everything. They're the ones who send it to the group chat.
He downloads it because he heard she might look him up. Social pressure does the public-health work that leaflets never managed.
It doesn't match anyone. It sits between the dating app and the bedroom, and it's the only thing that lives there.
It doesn't test anyone. It sends people to the free services that already exist and makes using them worth it.
Every tick starts with a free NHS-commissioned test. The app is a referral engine to SH:24, Sexual Health London and local clinics — not a competitor to them.
Ticks expire at 90 days. The incentive to retest is social, personal and permanent. No reminder campaign required.
More people tested more often among the 18–30s who account for the largest share of new diagnoses.
Aggregate only: ticks issued, retest rate, referral clicks by region. No individual data leaves the app. Ever.
Yes. Nobody gets one and nobody shows one, which is why it hasn't moved anything. The screenshot is the incumbent. Our only advantage over it is that nobody has to ask.
It sounds like surveillance and is built to be the opposite: a lookup writes nothing, notifies nobody, and every miss looks identical. The engineering makes it false. Our copy has to make it obviously false.
Correct, and we say so everywhere. Window periods exist and people have sex after they test. The alternative on offer is "yeah, calm". Not perfect versus perfect. Better versus nothing.
Nobody wants a seat belt either. The first reaction from someone who doesn't feel the problem is always "who's this for". The mechanism doesn't need them to want it. It needs one place where enough people have ticks.
Verbatim from the first young person to see it, 16 September 2026, logged in full in our feedback file. We'd rather quote the objection than pretend it won't come.
A check that finds nothing three times gets deleted. So we don't launch to the country. We reach density in one bounded community, then let the mechanism do the rest.
A single university, a London borough, or one festival crowd. Somewhere people date each other, talk to each other, and share a testing service we can partner with.
Enough ticks that an early check lands on one. Kits handed out with the partner service, a launch week timed to term or the event, and the youth panel's own group chats as the first seed.
Ticks issued, checks that found one, retest at 90 days, and referral clicks into the partner's service. Aggregate only, published either way.
Candidates: a South London university with an SH:24 or SHL contract in its borough; Bromley, our home borough, with its own online-testing provider; one summer festival with an on-site testing charity. The pilot partner chooses. We bring the kits and the measurement.
It only works if everyone's on it, and everyone isn't on anything that costs money. No ads, no data sales, no premium tier. Not now, not later.
Pennies per user per year. Serverless, no staff-heavy operations, no lab.
Grants and foundations, health-service partnerships, sponsored test kits.
Sell data. Show ads. Charge the people we're trying to protect.
Replace the photo upload with a verified result handed straight from your system — a reference number, not a screenshot. Co-branded kits. A new front door for the hardest-to-reach age group.
A 12-month regional pilot: launch, measure referral uplift and retest rates, publish what we find, good or bad.
Co-design with the young people you already reach. Funding that keeps it free and independent.
Behavioural and epidemiological evaluation on aggregate, anonymised data. We want to know if it works as much as you do.
Phone sign-in, tick issuance with AI reading plus human review, private lookups, block and invite-only lists, one-tap deletion, PWA on iOS and Android.
196 verified testing services in 36 countries: free and paid home kits, clinic finders, charities and NHS services, grouped by region. 59 across the UK alone, every link checked.
Verified results direct from partner labs. SMS notices. More countries and languages. An independent evaluation.
A clinical partner, an evaluation partner, and funding for the first regional pilot.
Seventeen years across policy research, fintech, public policy and consultancy. Builds with AI agents through Flex Technologies Group, which means a working product ships in days, not quarters — and iterates at the speed of feedback.
A clinical advisor in sexual health. A behavioural-science advisor. A young people's advisory group who'll tell us, bluntly, what's wrong with it.
Twelve months, one region, evaluated. Enough to cover kits for early adopters, an evaluation partner and one full-time person.
One testing service willing to hand results to the app by reference number, so nobody ever has to photograph anything.
A university or public health team to measure referral uplift, retest rates and what young people actually think of it.
Flex Technologies Group Ltd, trading as Clean Sheets · Company number 15882806, registered in England and Wales · 850 Green Lanes, London N21 2RS
Contact: admin@flexgroup.dev · Working app and deck: cleansheets.fyi/about · One page: one-pager.pdf
Everyone wants to have sex. Nobody wants to talk about it in the toilets of a club at one in the morning. This fixes that, for everyone, and all anybody has to do is look after themselves.
Take the test. Check the text. Enjoy the sex.