Plain-language STI education, no shame attached.
General knowledge. This app does not diagnose or give medicine.
Pads and cups catch period blood. They do not prevent pregnancy or infections. Condoms and dams are for sex.
Anyone who has a period can read the first part, including teens. The sex part is for people who have sex.
Pads
Stick one in your underwear. Change it every 4–8 hours, or sooner if it is soaked. Wrap it and bin it. Do not flush it.
Tampons
These sit in the vagina. Change one within 8 hours. Leaving one in longer raises the chance of a rare blood infection. Do not leave it in.
Menstrual cup
A soft silicone cup sits in the vagina and can stay up to 12 hours. Wash your hands, fold it in, and tug the rim so it seals. Pinch to break the seal before you pull it out. Wash with soap and water. At the end of the period, boil it for 1–2 minutes. A cared-for cup lasts for years. Leaks are usually the size or a seal that did not form. If you have an IUD, ask a clinician first — the cup can tug the strings. Stop and see a clinician if you get itching, a rash, or pain.
Menstrual disc
Another collector for period blood. Some can stay in during sex. It still does not prevent pregnancy or infections.
Period underwear
Wear it, then wash it. It is reusable. It does not prevent pregnancy or infections.
General information, not a diagnosis. Itching, a rash, pain, or bleeding that is not your period — see a clinician.
PACT Safe provides public health awareness for adults. This system does NOT provide medical advice, diagnostic tools, or dosage calculations for infants, pediatric care, or pregnant individuals. Pregnant users receiving an exposure alert must seek direct consultation from an OB-GYN immediately.
Internal condom
Also called a female condom. A thin pouch goes in the vagina, with the outer ring left outside. You can put it in up to about 8 hours ahead. Use it once, then bin it. Used correctly every time, about 95 in 100 people avoid pregnancy in a year. With missed or wrong use, about 79 in 100. Used correctly for vaginal sex, it also lowers the chance of infections, including HIV. There is not enough evidence to give a number for anal sex. Do not use it together with an external condom — they rub and split. Most are nitrile, not latex. Oil damages latex condoms.
External condom
Rolls onto a penis or a toy. It lowers both pregnancy and infection risk, and it is the easiest one to find. A person with a vagina can choose an internal condom if the other person will not wear one.
Dental dam
A thin sheet for oral sex on a vulva or anus. Keep the same side out. Do not flip it.
Pill, IUD, implant
These prevent pregnancy only. They do not stop infections. Infections need a condom or a dam.
Medical line-art guide to how infections travel and how barriers stop them. Adults only — not pediatric, infant or pregnancy advice; if you are pregnant, see an OB-GYN.
Some infections pass through oral contact alone.
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Size follows erect girth, not length. Most condoms are already long enough.
Too tight hurts, leaves a ring, and tears, so people take it off. Too loose slips, and semen can leak. The right width stays on, so it actually protects.
Stand your real card upright on the picture. Drag with one finger to shrink or grow it until the short edges match.
This phone does not open the camera. The number stays on this phone only after you tap save.
Educational only, not a diagnosis. Everything you tick here stays on this device.
If a condom breaks or slips off within 72 hours, go to PEP next. Sooner is better. A doctor prescribes it.
Open PEPPrEP is taken before sex, over time, to lower HIV risk.
PEP is a short course after a possible exposure, generally considered within 72 hours.
They are not the same medicine. A clinician decides. This app does not give medicine.
After 72 hours, testing is the next step. A listing is not an endorsement.
What to ask for at a clinic, and how soon. Education only — a clinician decides what fits you.
HIV PrEP — daily pills to lower HIV risk
Prescription medicine that may help reduce HIV risk when used as directed by a clinician.
Start before risk; needs a baseline HIV test first.
HIV PEP — emergency pills after possible exposure
Time-critical28-day emergency course after a possible HIV exposure.
Within 72 hours — the sooner the better.
Doxy-PEP — extra pills after sex (clinic may offer)
Time-criticalOne 200 mg doxycycline dose after condomless sex, to lower syphilis, chlamydia and gonorrhea risk. Guidelines mainly cover gay and bisexual men and transgender women — a clinician decides if it fits you.
Ideally within 24 hours, no later than 72 hours after sex. Never more than one dose in 24 hours.
HPV vaccine
Protects against the HPV types behind warts and most cervical cancers.
2–3 doses over 6 months; useful at any adult age.
Hepatitis B vaccine
Prevents hepatitis B, which spreads through blood and sexual fluids.
3 doses over 6 months; ask for an immunity check.
Mpox vaccine
Two-dose vaccine offered to people with higher exposure risk.
2 doses, 4 weeks apart; also used shortly after contact.
Contraceptive pill
Regular hormonal pill that prevents pregnancy.
Taken daily at the same time; adults only, ask a clinician.
Prevents pregnancy only — no protection against infections.
Emergency contraception
Time-criticalMorning-after pill used after unprotected sex.
Within 72 hours; some options work up to 120 hours.
Prevents pregnancy only — no protection against infections.
Condoms & dental dams
The only option that lowers risk for nearly every infection.
Every time, from start to finish; use water-based lubricant.
Educational only — not medical advice and not a medical device. Availability, price and rules differ by country. A clinician decides what fits you.
Tick anything you've noticed. Nothing is uploaded.
Can cause discharge or pelvic pain. Not on every clinic panel — ask the desk if symptoms persist after other tests. This is education, not a diagnosis.
Rash or sores after close contact. Ask a clinic; isolation and vaccines are clinician-led. This app does not diagnose.
Common, treatable change in vaginal bacteria — not always an STI. A clinic can confirm. Not a partner-notice disease in this app.
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