CelsiusFahrenheit
You're still converting in your head. After all these years.
CelsiusFahrenheit is an iOS widget that shows both temperatures side by side, all day, until the other one finally clicks.
The problem
You don't need a converter. You need to stop converting.
Maybe you moved from Boston to Berlin five years ago. Maybe you're a Brit in Brooklyn. Maybe you just keep traveling. Either way, you've used a converter app a thousand times — and you still can't feel what 14°C means without doing the arithmetic.
That's because looking up an answer is the opposite of learning. Every conversion you do is another small reason your brain doesn't bother building intuition for the other scale.
The only way to learn the other scale is to see it next to a number you already understand. Constantly. Without trying.
That's all this app does. It puts both numbers — Celsius and Fahrenheit — on your home screen and lock screen, so every time you check the weather, you see both. After a few weeks, you stop translating. After a few months, you forget which one was your "native" scale.
The widget
Three sizes. Both numbers. Always there.
Pick the size that fits your home screen or lock screen. Each one shows both temperatures at a glance, with a city photo background that reflects where you actually are.
Who it's for
Built for people who've given up on conversion math.
- Americans abroad — You've lived in Europe for years. You still mentally convert before deciding what to wear.
- Europeans, Canadians, and Aussies in the US — "It's going to be 85 today" still means nothing until you do the math.
- Frequent travelers — Every trip means re-learning what the forecast actually means.
- Anyone teaching kids both scales — Or a partner. Or yourself.
Features
What's in it.
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Both units, always visible
Celsius and Fahrenheit shown together — no tap, no toggle, no math.
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Live city photos
Unsplash imagery matched to your current location, updated automatically.
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Three widget sizes
Medium, small, and a lock screen complication.
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Real-time weather
Powered by Open-Meteo. Refreshes throughout the day.
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Pay once. No subscription.
$0.99 one time. No accounts, no ads, no in-app purchases.
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Privacy-respecting
Location is used only to fetch weather. Nothing is stored on a server.
Get the widget. Stop converting.
$0.99, paid once. No subscription. iOS 17+.
Download on the App Store