Oh Fever keeps your child's temperatures and the medicines you gave in one calm diary. On iPhone and, uniquely, on Apple Watch it shows how long it has been since the last paracetamol or ibuprofen, how many doses you recorded in 24 hours and what the leaflet says, word for word, and it gives both parents one shared timeline. On Android it also shows the leaflet table dose for your child's weight.
Free for one child, every feature included. Plus (one-time, no subscription) adds more children, and on iPhone also sharing with the other parent. Requires iOS 26 or Android 9.
Fever nights are a blur. Oh Fever keeps the timeline of what you gave and when, next to what the leaflet says, so you can keep your attention on your child.
Log readings with the method (ear, forehead, armpit, oral, rectal), see a colour-coded status and a 24 h / 48 h / 7-day chart with medicines overlaid.
Pick the exact product you have (Apap, Panadol, Pedicetamol, Nurofen, Ibum, Ibufen, Ibuprom, MIG or suppositories) and read its leaflet dosing table and key sentences exactly as printed, with a link to the official leaflet. On iPhone the app never calculates or suggests a dose: you enter the amount you gave. On Android the app also shows the row of the leaflet table for your child's weight and age.
On iPhone: the time since the last dose and the doses recorded in 24 hours, on the home screen, in widgets, on the Lock Screen and in the Dynamic Island, with an optional reminder at a time you choose. On Android: a countdown to the next dose the leaflet allows.
On iPhone, share a child's profile through iCloud. Doses logged on one phone show up on the other: no accounts, no group chat archaeology.
Log a temperature and the amount you gave with the Digital Crown, and see the time since the last dose from a complication while your hands are busy.
“Log paracetamol in Oh Fever.” “When was the last ibuprofen in Oh Fever?” Works from the Lock Screen.
On iPhone: leaflets and tables, °C ↔ °F conversion and an age-based “when to see a doctor” checklist.
Android: the same doctor checklist, plus the dose by weight from the leaflet table and daily hydration needs, which the iPhone app does not have.
One tap creates a clean PDF of the last days: temperatures, doses given, notes. Export everything as JSON anytime.
Your entries live on your device and in your own iCloud (iPhone) or Google backup (Android); we never see them. No ads, no cross-app tracking, no registration. Pseudonymous usage statistics only with your consent, and you can switch them off in Settings.
Most fever apps stop at the phone. Oh Fever runs natively on Apple Watch and syncs through iCloud on its own, so it works even when the iPhone is charging in another room.
After you record a dose on iPhone, a Live Activity shows on the Lock Screen and in the Dynamic Island how long it has been since that dose. No unlocking, no opening the app, no mental arithmetic at 3 a.m.
Invite the other parent (or grandma) with a standard iCloud share. Every reading, dose and note appears on their iPhone, Apple Watch and widgets. Leave the share any time. Sharing works on iPhone; the Android app does not have it yet.
The table sums up the leaflets of the listed products registered in Poland (Polish medicines register). On iPhone and Apple Watch, Oh Fever shows each product's leaflet table and sentences exactly as printed, with a link to the official leaflet; it records what you gave and never calculates or suggests a dose. On Android, Oh Fever shows the row of the leaflet table for your child's weight and age, rounded to the syringe marks and never above the row, and warns before a dose that is too early, too large or over the daily limit, while still letting you log it. The dose calculators in our guides use the same tables. Every table and every rule the Android app and the calculators add is on the dosing sources page.
| Paracetamol | Ibuprofen | |
|---|---|---|
| Single dose | leaflet table (about 10-15 mg/kg) | fixed dose from the leaflet table (about 7-10 mg/kg) |
| Minimum interval | ≥ 4 h; 6 h, and 4 h only between doses of up to 10 mg/kg (Apap dla dzieci Forte, Pedicetamol); Paracetamol Hasco (leaflet “no more often than every 4-6 hours”): the calculator and the Android app use 6 h, and 4 h only between doses of up to 10.5 mg/kg | ≥ 6 h; 8 h where the leaflet gives 6-8 h with 3 doses a day |
| Max per 24 h | 4 · 60 mg/kg | 3 (4 only where the table allows) · 30 mg/kg |
| Restrictions | under 3 months (some products: under 2-3 years) only on a doctor's recommendation | from 3 months and 5 kg; some products later (per leaflet) |
Leaflet figures. Only the Android app and the calculators on this website apply them; the iPhone and Apple Watch app shows the leaflet text as printed and does not apply or enforce them.
Health data about a child is about as sensitive as data gets. Oh Fever has no backend: entries stay on your device and, on iPhone, in your own iCloud account, protected by Apple. On Android they stay on the phone and, if Android backup is on, in the encrypted backup in your Google account.
On iPhone, sync and sharing go through your private iCloud, end-to-end handled by Apple.
We have no servers that see your entries, so there is nothing to leak, profile or sell.
A JSON export and a PDF report are one tap away.
Turn iCloud off and the app keeps working locally.
Weight-based calculators on this website and short guides, written from the leaflets and NICE/AAP guidance. Free, no ads, no sign-up.
For one child, yes, with every feature included. On iPhone that means readings, dose records, leaflets and tables, time since the last dose, Apple Watch, Siri, widgets, PDF report and iCloud sync of your own devices. Oh Fever Plus is a one-time purchase (no subscription). On iPhone it unlocks sharing a child with the other parent and unlimited children; it works with Apple Family Sharing, and the invited parent never pays. On Android it removes the one-child limit.
No. It is a diary. On iPhone and Apple Watch it records what you gave and shows the leaflet's own words; it does not calculate or suggest doses. On Android it also shows the dosing table row from each product's leaflet for your child's weight and age and keeps track of the leaflet's intervals and daily limits. It is not a medical device. Diagnosis and treatment decisions belong to your paediatrician. Call emergency services for seizures, breathing problems or a rash that does not fade.
From the leaflet of each listed product registered in Poland (the Polish Register of Medicinal Products): its dosing table, daily limit, interval and age limits. On iPhone and Apple Watch the app shows these tables and sentences word for word, with a link to the official leaflet, and does not calculate or suggest a dose: you decide the amount with the leaflet and your doctor. On Android the app shows the table row for your child's weight and age and keeps track of the leaflet's interval and daily limits; for a product you add yourself it does not suggest a dose, you enter it from its leaflet. When to see a doctor follows NICE and NHS guidance. The tables, the register links and every rule the Android app adds are on the dosing sources page.
On iPhone and Apple Watch Oh Fever is a monitoring diary: you record what you gave, and it shows the time since the last dose, the doses recorded in 24 hours and the leaflet's tables and sentences exactly as printed. It does not calculate, suggest or prefill a dose and does not use your child's weight for medicines. The amount is decided with the leaflet and your doctor. The Android app works differently and also shows the leaflet table row for your child's weight.
You share a child's profile using Apple's iCloud sharing, the same mechanism as sharing a Notes folder. The other person taps the link, and both phones keep the same timeline in sync. Sharing is available on iPhone; the Android app does not have it yet.
No. The Watch app is a bonus for parents who have one. Everything works on iPhone alone.
iPhone with iOS 26 or later, Apple Watch with watchOS 26 or later, and Android phones with Android 9 or later. The Android app (phone only) does not have a Wear OS app or sharing with the other parent yet.
Your health entries: none. They stay on your device and in your own iCloud (iPhone) or encrypted Google backup (Android), and we have no server that sees them. If you agree when you first open the app, it sends pseudonymous usage statistics through Firebase Analytics (for example “a dose was logged”, never the values you enter), so we know which features matter. They stay off until you agree, and you can switch them off again in the app's settings.
Set up a child in a minute: name and birth date. Then record temperatures and the medicines you give, and see at a glance when the last dose was. On Android, add the weight to see the leaflet table dose.
Oh Fever