Donor guide

1. Install and sign in

1. Get the app from the download page. LifeLink is not on the Play Store yet, so Android will warn that the app is from an unknown source. That is expected.
2. Open it. Three short slides explain how it works; you can skip them.
3. Tap Continue with Google. Facebook is under More ways to sign in. There is no password to remember.

2. Become a donor (three steps)

From Home, tap Complete your donor profile.

Step	You enter	Good to know
Your name and blood type	Full name, blood type	Don't know your blood type? A hospital can test it. You can't be matched without it.
Where are you?	Your district (khan). Optionally tap Use my current location	Other people only ever see your district, never your exact location. Without a location you are still matched.
Your last donation	The date, or I have never donated, and your sex (optional)	Used only to count your wait between donations. Prefer not to say counts the longer wait.

When you save, the app shows You can donate now, or Eligible in N days with the date.

3. How long you wait between donations

LifeLink counts 3 months (90 days) for men and 4 months (120 days) for women from your last donation, as blood centres in Cambodia do. If you don't give your sex, it counts 120 days. The staff at the centre make the final check.

4. When a request arrives

You get a push notification: "Urgent blood request near you — you are a match." You also find it under the bell icon and in the Donor inbox.

You are only alerted when all of these are true:

• your blood type can be given to the patient (not only the same type: compatible types count too);
• you are available (see below) and eligible (your wait is over);
• you are within about 10 km of the hospital, or you shared only your district;
• an admin has already checked the request (it shows Checked by a LifeLink admin).

Open the alert to see the blood type needed, how many units, the hospital and how far it is.

5. Accept or decline

• Before you accept, the app asks whether any of these apply to you: for example, weighing less than 45 kg. If one does, you may be turned away at the centre. Check with them first, or decline.
• Accept: you see the family's contact name and phone number. Tap Copy number and call them. The number is not verified, so if it doesn't connect, try again later.
• Decline: nothing else happens. Someone else can still help.
• No internet? Your answer is saved on your phone and sent as soon as you are back online. You don't need to answer again.

If a request looks fake, or someone asks you for money or offers to pay you, tap Report this request. Only the LifeLink admin sees your report, and the family is not told who sent it.

6. After you donate

When the hospital confirms your donation, an admin records it. The History tab then shows:

• every confirmed donation;
• Up to N patients reached: one unit is separated into red cells, plasma and platelets, so one donation can help up to three patients;
• when you can donate again.

Before you go to donate

• Weigh at least 45 kg, and usually be 18 to 60 years old.
• Eat a proper meal in the 4 hours before, drink plenty of water, and sleep well.
• Bring your ID card.
• A standard donation in Cambodia is 350 ml. The draw takes about 10 minutes; the whole visit is usually under an hour.

Wait before donating if, for example, you had a fever or took antibiotics in the last 2 weeks, had dengue or malaria in the last 6 months, or got a tattoo or piercing in the last 12 months. The app's What to expect when you donate screen has the full list.

Where: the National Blood Transfusion Center (NBTC), St 271, next to Khmer-Soviet Friendship Hospital, Phnom Penh. Walk-ins are welcome. Hospital blood banks and mobile blood drives also collect blood.

Donating is voluntary and unpaid. A snack or small gift is the centre's way of saying thank you.

7. Pause or stop

• Pause alerts: in Me → My donor profile, turn off Available for requests. Your profile stays.
• Delete your account: Me → Delete account. Your profile, blood type, location and phone numbers are deleted. Donation counts stay in LifeLink's statistics with no name attached. This can't be undone.