PrEP Trackr

Last intake —

March 2026

🔥 0 day streak

⏸ PrEP is paused — reminders off

🛡️ Covered / Reduced = estimates from your logged doses using CDC build-up times — a planning aid, not a measurement of your protection.

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Next Recommended Test

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CDC recommends testing every 3 months on PrEP

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Test History

Adherence

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This month

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Last 30 days

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Total doses

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Current streak

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Best streak

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Missed this month

3-Month Test Reminder

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Pill Supply

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pills remaining

Set your supply to track refill timing

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Latest Lab Results

Lab History

Feature Requests

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Log Intake

Pills taken

Photo Proof

📷

Tap to take a photo

or choose from your library

📷

Change photo

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Photo Proof

Note

Side effects (optional)

Side effects

💊 Pills taken —

🕐 Logged at —

Log Test

Record when you got tested

Test Date

Note (optional)

Test Details

🧪 Tested on

Note

Results

Result Date

Attachments (images or PDFs)

📋 Results received

Attachments

Lab Results

Profile & Settings

Personal info & preferences

Personal

Country (optional — helps us build better features)

Sexual Activity

Type of sex (for coverage estimate)

Select your sexual activity type to see an estimated coverage window on the calendar. It's based on the doses you log and CDC build-up times — not a measurement of your protection.

How you take PrEP

Taking a Break

Pause PrEP

Paused days won't show as missed. Reminders stop.

Notifications

Daily Reminder

At your 24-hour mark

Remind me (pick one or more)

Select when to be reminded relative to your 24-hour mark.

Snooze Duration

Reminders are a convenience. Delivery depends on your device, browser and connection and can be delayed or missed — don't rely on them alone.

⚠ Notifications are blocked in your browser. To re-enable, go to your phone's Settings → Safari → Notifications.

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Before you start

A quick note on what this app is — and isn't

PrEP Trackr is a personal tracking tool. It is not a medical device and does not give medical advice, diagnosis or treatment. Your healthcare provider does that.

🛡️Coverage markers on the calendar are estimates from the doses you log, using published CDC build-up times. They are not a measurement of your protection.
🔔Reminders are a convenience. Delivery depends on your device and browser and can be delayed or missed. Don't rely on them alone.
⚕️For missed doses, side effects, switching regimens or anything about your health, follow your provider's guidance.

By continuing you confirm you are 18 or older and agree to the Terms of Service and Privacy Policy.

Reminders paused

You haven't logged a dose recently

⏸

PrEP protection resets after 3 consecutive missed doses. We've automatically paused your reminders so you won't get pinged about a cycle that's already reset.

When you're ready to restart, tap below — your calendar will track your new buildup from your first dose back.

2-1-1 complete

All doses taken

🎉

PrEP Facts

Dosing, timing & effectiveness

Key things to know about taking PrEP (Truvada / generic TDF/FTC) correctly. Summarised from the public sources linked under each card for general information — this is not medical advice. Your provider's instructions always come first.

Effectiveness

💊

Daily dose

Take every 24 hours

PrEP must be taken once daily, ideally at the same time each day, to maintain steady drug levels in tissue and blood.

↗ CDC — Preventing HIV with PrEP

🛡️

Up to 99% effective

Near-complete protection when adherent

Daily PrEP reduces the risk of getting HIV from sex by about 99% when taken consistently every day.

↗ HIV.gov — Pre-Exposure Prophylaxis (PrEP)

Build-up time

⏱️

~7 days

Anal sex protection

For receptive anal intercourse, full rectal tissue drug levels are reached after about 7 consecutive daily doses.

↗ CDC — Clinical Guidance for PrEP

⏳

~21 days

Vaginal sex & injection protection

For vaginal sex or injection drug use, maximum vaginal tissue drug levels require approximately 21 daily doses.

↗ CDC — Clinical Guidance for PrEP

Missed doses

⚠️

Important

Never double-dose

On daily PrEP, if you miss a dose, take it as soon as you remember — unless it's almost time for your next pill. Skip the missed dose if it's almost time, and don't take two pills at once to catch up. (The planned 2-pill starting dose of 2-1-1 is different — see below.)

↗ NIH AIDSinfo — Truvada Patient Info

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Once protected

1 missed day doesn't break protection

TFV-DP (the active drug) has a 6–7 day intracellular half-life in rectal tissue. Missing a single dose once you're already protected does not immediately drop protection — residual drug levels remain for 1–2 days after the last pill.

↗ PMC5095697 — Pharmacology supports on-demand PrEP

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Dose response

4+ doses/week ≈ 96% effective

Once protection is established, taking 4 or more doses per week still provides approximately 96% effectiveness for anal sex. Missing 1 day per week is unlikely to meaningfully reduce your protection level.

↗ PMC4402345 — Dose Response for Starting and Stopping PrEP (MSM)

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Watch out

3+ consecutive missed days = protection at risk

Missing 3 or more days in a row — even after a long streak — likely drops tissue drug levels below the protective threshold. Resume daily dosing immediately and consider contacting your provider.

↗ CDC — Clinical Guidance for PrEP

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Still building

Missed a day during buildup? Window extends, not resets

If you miss a single day while still working toward the 7- or 21-day threshold, your protection start date shifts by 1 day — it does not restart from zero. Missing 2+ consecutive days during buildup does require starting the count over.

↗ PMC5095697 — Pharmacology supports on-demand PrEP

On-demand (2-1-1)

⚡

2 · 1 · 1

Timed around sex, not daily

2 pills 2–24 hours before sex (closer to 24 h is preferred), then 1 pill 24 hours after the double dose and 1 pill 48 hours after the double dose. If sex continues on following days, keep taking 1 pill a day until 48 hours after the last time. Log 2 pills in this app to start a course and get a reminder for each follow-up dose.

↗ CDC — PrEP Clinical Practice Guideline 2021 (pp. 55–57)

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Restarting

The 7-day rule

If your last pill was less than 7 days ago, 1 pill is enough to restart — then keep taking 1 pill a day until 48 hours after sex. If it's been 7 days or more, start again with 2 pills. Switching to daily afterwards is simple: just keep taking 1 pill every 24 hours.

↗ CDC — PrEP Clinical Practice Guideline 2021 (p. 56)

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Who it's for

Anal sex, TDF/FTC only

2-1-1 has only been studied in adult men who have sex with men, using TDF/FTC (Truvada or generic). It is not recommended for vaginal sex, with Descovy (F/TAF), or if you have hepatitis B. It is off-label in the US — agree the switch with your provider.

↗ CDC — PrEP Clinical Practice Guideline 2021 (p. 57)

Best practices

🍽️

Flexible

Food doesn't affect absorption

TDF/FTC can be taken with or without food. Taking it with a meal may help reduce nausea when starting PrEP.

↗ FDA — Truvada Prescribing Information

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Every 3 months

Regular STI & kidney checks

While on PrEP you should see a provider every 3 months for an HIV test, STI screening, and kidney function monitoring.

↗ CDC — Clinical Guidance for PrEP

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Tip

Keep pills somewhere visible

Place your pill bottle next to your toothbrush, phone charger, or coffee maker — somewhere you visit daily — to build a consistent habit.

↗ CDC — PrEP Medication Guide (Patient)

Update Pill Supply

How many pills do you have right now?

Log Lab Results

Record your latest lab work

Link to test

HIV Test

Kidney Function

STI Panel

Note (optional)

Attachments (images or PDFs)

Visit Summary

PrEP Adherence — Last 90 Days

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doses taken

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missed

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current streak

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total doses ever

STI Testing

Lab Results

Reported Side Effects (last 90 days)

Admin Dashboard

PrEP Trackr — Super Admin

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