The private logbook for GLP-1 and peptides

Reko is an iPhone app for recording every shot and dose, the site it went into, and what happened after. Weight, side effects, food, sleep, labs and cycle in one place, with your record kept on your phone.

Two weeks free·$39.99 a year or $9.99 a month·No account needed
The day screen: every dose logged in a few tapsEstimated medication level over timeReconstitution calculator with the syringe drawn to the markWeight trend with every entrySide effects with severity, by dayInjection-site map with rotationCalendar of doses and entriesProgress across weight, measurements and labsReko in dark mode
Track the medication you useSemaglutideTirzepatideRetatrutideLiraglutideBPC-157TB-500Ipamorelinand 40 more

One app for every dose and what comes after

Doses

Amount, time and site in a few taps.

Next doseSunday 9:00 pm
Site rotationRight thighLast used 7 days ago

Side effects

Beside your doses, so you can see patterns.

NauseaFatigueBloatingConstipation
This weekSettling

Estimated level

From your own doses and the published half-life.

An estimate, not a blood test.

Weight and body

The trend, not every up and down.

Change since you started−4.2 kg
Read from Apple HealthOn

Food, water, protein

Against targets you set yourself.

Protein92 / 110 g
Water1.8 / 2.5 L

Vials and supply

What is left, counted down as you log.

In stock2 vials
Remaining52.5 mgabout 7 doses

How Reko helps you keep your record straight

01

Log every dose, and where it went

Record the amount, time and injection site in a few taps. A body map shows which sites you used recently, so you can rotate them. Schedules cover weekly shots, daily doses, step-up titrations and on/off cycles. Reminders never name your medication on the lock screen.

See the logbook →
Body map of injection sites
02

See an estimate of what is in your system

Reko draws an estimated level from your own doses and each compound's published half-life, so you can read the rise and fall between injections. It is an estimate, and it says so.

Estimated level over time
03

Watch side effects next to your doses

Log nausea, tiredness, bloating and the rest the day they happen, then look at them beside your dose history. Bring a clear picture to your next appointment.

See side effects beside doses →
Side effects shown beside doses
04

Vials, pens and the arithmetic

Track what is left in each vial as you log. The reconstitution calculator turns what is in the vial and the water you add into syringe units to draw, and warns you when a draw falls between your syringe's markings. You decide the dose; Reko only does the arithmetic on your numbers.

Concentration10 mg/mL
Draw75 units
Reconstitution calculator
05

Weight, food, sleep, labs and cycle

Follow your weight over time, log protein, water and food, add sleep and training, and read what you allow from Apple Health. Scan a printed lab report and check every value before it is saved. Cycle tracking sits beside your doses and is never uploaded.

See everything Reko tracks →
Weight over time

Free guides and tools

Plain-language guides and small free tools. No sign-up.

Why people choose Reko

Correct numbers

One number reader across the app, and anything read from a photo or a file is shown back to you before it is saved.

Private by default

No account needed. Your record stays on your iPhone unless you turn backup on. Apple Health data and cycle entries never leave the phone.

Nothing to sell you

Reko recommends nothing, sells nothing and suggests no doses. The price is on this page, not sprung on you after setup.

Common questions

Is Reko free?

You get two weeks free, then $39.99 a year or $9.99 a month. Before you pay you can open every screen with a full example record.

Does Reko tell me what dose to take?

No. Reko records what you and whoever prescribed or supplied it decide. It is not medical advice.

Does it track injection sites and rotation?

Yes. A body map shows the sites you used recently.

Can it remind me when a dose is due?

Yes, and the reminder never names your medication on the lock screen.

Does it work with Apple Health?

If you allow it, Reko reads weight, food, sleep and workouts from Apple Health so you type less. What it reads stays on your phone.

Where is my data?

On your iPhone. If you turn backup on, doses and notes are stored on servers in the EU. Cycle entries are never uploaded.

Is there an Android version?

Not yet. Reko runs on iPhone and iPad, with an Apple Watch complication and a home-screen widget.

Your record, in one private place

Two weeks free. Open every screen with an example record before you pay.

RekoTwo weeks freeDownload