Dengue care at home, hour by hour.
Log fluids, spot warning signs and know exactly when to go to hospital. Critical48 watches the 48 hours after the fever breaks, so you are never guessing.
When the fever breaks, the danger starts.
The 48 hours after a dengue fever drops need the closest watch. It is easy to think the worst is over just when fluid levels matter most. We stay with you through them, hour by hour.
Built for the person holding the glass of water.
Simple logs, clear targets and plain-language guidance, made for tired caregivers at 3 AM.
A daily fluid target made for your patient
Enter age, weight, day of illness and risk factors like pregnancy or diabetes. Critical48 shows how much to drink today, for example "Nimal needs about 2,500 ml", and tracks it hour by hour.
Log a drink
King coconut, kanji, ORS, water, juice. One tap and the cup size.
Log urine
Enter the amount and match the colour on a simple scale. We track it against the 4-hour target.
Temperature trend
See the last five days at a glance and know when the fever has broken.
Warning-sign checks
Belly pain, vomiting, bleeding gums, drowsiness. A quick tap-through every few hours.
Scan lab reports
Point the camera at the report. Platelets, PCV and WBC are read and charted for you.
Care circle
Brothers, sisters, neighbours. Everyone logs and everyone sees the same picture.
Every screen answers one question: what do I do now?
Large numbers, calm colours and one clear button on each screen.
Set up in under two minutes.
No medical training needed. Just your phone and the patient's basic details.
Create your account
Sign up with your mobile number or Gmail and pick English, Sinhala or Tamil.
Add the patient
Age, weight, day of illness and anything that raises the risk. We set the daily fluid target.
Log, hour by hour
Drinks, urine, temperature and signs. We remind you and tell you when to go.
24 screens. One calm, clear app.
From the first sign-up to the doctor's summary. Hover a row to pause it.
Fever's down. Now we watch closely.
The moment the temperature drops, Critical48 switches into a tighter rhythm with a live countdown, more frequent checks and clearer alerts.
Take them to hospital. Now.
If a warning sign appears, Critical48 turns red. One tap calls Suwa Seriya 1990, opens directions to the nearest hospital and alerts everyone in the care circle.
Nobody watches alone.
Invite family members as caregivers, loggers or view-only. Night shift hands over to the morning shift with nothing lost, and everyone is alerted the moment you head to hospital.
Read it the way you think.
Warning signs and the doctor summary are available in all three languages, whichever you choose.
Good to know.
No. Critical48 helps you keep accurate records and recognise warning signs early. Your doctor's advice always comes first, and the app tells you to go to hospital when signs appear.
It uses the patient's age, weight, day of illness and risk factors such as pregnancy, infancy, age over 65 or diabetes. If the doctor gives a different target, follow the doctor.
Yes. Invite family members to the care circle. Everyone sees the same log in real time, so shifts hand over smoothly.
English, Sinhala and Tamil. You can switch at any time from your profile.
Yes. Critical48 is free for family caregivers.
The next 48 hours matter. Don't watch them alone.
Download Critical48 and set up your patient in under two minutes.