Convert currencies offline.
170+ fiat currencies, 31 cryptocurrencies, rates refreshed every four hours — all of it working on the plane, at the border, or in a basement with zero signal.
Most converters break the moment you need them most.
No signal, no rates
Most apps need a live connection. Open one on airplane mode and you get a spinner where a number should be.
Ads, popups, dark patterns
Free converters are packed with full-screen interstitials and 'upgrade' nags. You just want 100 USD in yen.
Stale rates, no warning
Some apps happily show you yesterday's numbers and never tell you. Currency Offline flags stale data so you know what you're looking at.
Don't get stuck paying over the odds at a foreign till
On a flight, rate = unknown
At a foreign cashier, data = off
Open the app. Convert. Pay with confidence.
Built for travellers, traders, and anyone off-grid
Calculator-first converter
Type expressions like 1000+999−745 and see them resolved in both currencies, with the live rate at the bottom.
170+ currencies, instantly
Search any of 170+ fiats and 31 crypto by name, code, or country — favourites and recents always one tap away.
Conversion history
Every calculation is saved with the rate at the time. Useful for receipts, expense reports, and second-guessing yourself later.
170+ fiat currencies
Every ISO-listed currency in the world, from US Dollar and Euro to the Uzbekistani Som and Malagasy Ariary.
31 cryptocurrencies
Bitcoin, Ethereum, Solana, XRP, Dogecoin, and the majors that matter — priced right next to fiat, no separate app needed.
Refreshes every 4 hours
When you're online, the app silently pulls fresh rates from trusted financial providers. When you're not, it keeps the latest ones cached.
Home-screen widgets
Pin your favourite pairs to your home screen. Glance at GBP/EUR, USD/JPY, or BTC/USD without even opening the app.
Batch conversion
Compare one amount across many currencies at once. See how far your dollar goes in euros, pounds, yen, and pesos in a single view.
Stale-rate indicator
If rates haven't been refreshed in a while, you'll see it. No silent stale numbers masquerading as the truth.
Landed in Tokyo at midnight with a dead SIM. Currency Offline was the only thing that still told me what 15,000 yen meant. Ended up using it the whole trip instead of the bank's own app.
Why people keep it on their home screen
Truly offline-first
Every conversion works without a connection. Download rates once, use them anywhere.
200+ symbols in one place
170+ fiat plus 31 crypto. Nothing to install separately for Bitcoin or Ethereum.
Widgets + batch mode
Pin favourite pairs to the home screen or compare one amount across many currencies in a single tap.
Private by design
No account, no personal data. Your history and preferences live on your device.
Start free. Remove the ads when you're ready.
Free Tier
Open the app, convert. No card, no account, occasional ads.
Everything unlocked
Weekly, monthly, or one-time Lifetime. Lifetime = pay once, no renewals.
Frequently Asked Questions
Traveller — Tokyo
Landed at midnight with a dead SIM. This was the only thing that still told me what ¥15,000 meant at the taxi rank.
Digital nomad
I hop between five countries a year. Widgets on the home screen for my four most-used pairs — perfect.
Frequent flyer
Finally an app that actually works on the plane. That is literally the one moment I need it.
Small-business owner
Batch mode saves me ten minutes every time I price across markets. Small thing — adds up fast.
Traveller — Tokyo
Landed at midnight with a dead SIM. This was the only thing that still told me what ¥15,000 meant at the taxi rank.
Digital nomad
I hop between five countries a year. Widgets on the home screen for my four most-used pairs — perfect.
Frequent flyer
Finally an app that actually works on the plane. That is literally the one moment I need it.
Small-business owner
Batch mode saves me ten minutes every time I price across markets. Small thing — adds up fast.
Traveller — Tokyo
Landed at midnight with a dead SIM. This was the only thing that still told me what ¥15,000 meant at the taxi rank.
Digital nomad
I hop between five countries a year. Widgets on the home screen for my four most-used pairs — perfect.
Frequent flyer
Finally an app that actually works on the plane. That is literally the one moment I need it.
Small-business owner
Batch mode saves me ten minutes every time I price across markets. Small thing — adds up fast.
Solo traveller
The stale-rate badge is the feature no one talks about. You always know whether you're looking at fresh numbers.
Expat
Paid the lifetime on day one. Lost a full phone to theft six months later — restored everything on the replacement in a tap.
Freelancer
I invoice clients in three currencies. Having USD, GBP, and INR on the home screen saved me from three Google searches a day.
Backpacker
Works perfectly on a battered Android in a Bolivian hostel with no Wi-Fi. That's the whole test.
Solo traveller
The stale-rate badge is the feature no one talks about. You always know whether you're looking at fresh numbers.
Expat
Paid the lifetime on day one. Lost a full phone to theft six months later — restored everything on the replacement in a tap.
Freelancer
I invoice clients in three currencies. Having USD, GBP, and INR on the home screen saved me from three Google searches a day.
Backpacker
Works perfectly on a battered Android in a Bolivian hostel with no Wi-Fi. That's the whole test.
Solo traveller
The stale-rate badge is the feature no one talks about. You always know whether you're looking at fresh numbers.
Expat
Paid the lifetime on day one. Lost a full phone to theft six months later — restored everything on the replacement in a tap.
Freelancer
I invoice clients in three currencies. Having USD, GBP, and INR on the home screen saved me from three Google searches a day.
Backpacker
Works perfectly on a battered Android in a Bolivian hostel with no Wi-Fi. That's the whole test.
Traveller — Tokyo
Landed at midnight with a dead SIM. This was the only thing that still told me what ¥15,000 meant at the taxi rank.
Digital nomad
I hop between five countries a year. Widgets on the home screen for my four most-used pairs — perfect.
Frequent flyer
Finally an app that actually works on the plane. That is literally the one moment I need it.
Small-business owner
Batch mode saves me ten minutes every time I price across markets. Small thing — adds up fast.
Traveller — Tokyo
Landed at midnight with a dead SIM. This was the only thing that still told me what ¥15,000 meant at the taxi rank.
Digital nomad
I hop between five countries a year. Widgets on the home screen for my four most-used pairs — perfect.
Frequent flyer
Finally an app that actually works on the plane. That is literally the one moment I need it.
Small-business owner
Batch mode saves me ten minutes every time I price across markets. Small thing — adds up fast.
Traveller — Tokyo
Landed at midnight with a dead SIM. This was the only thing that still told me what ¥15,000 meant at the taxi rank.
Digital nomad
I hop between five countries a year. Widgets on the home screen for my four most-used pairs — perfect.
Frequent flyer
Finally an app that actually works on the plane. That is literally the one moment I need it.
Small-business owner
Batch mode saves me ten minutes every time I price across markets. Small thing — adds up fast.
Solo traveller
The stale-rate badge is the feature no one talks about. You always know whether you're looking at fresh numbers.
Expat
Paid the lifetime on day one. Lost a full phone to theft six months later — restored everything on the replacement in a tap.
Freelancer
I invoice clients in three currencies. Having USD, GBP, and INR on the home screen saved me from three Google searches a day.
Backpacker
Works perfectly on a battered Android in a Bolivian hostel with no Wi-Fi. That's the whole test.
Solo traveller
The stale-rate badge is the feature no one talks about. You always know whether you're looking at fresh numbers.
Expat
Paid the lifetime on day one. Lost a full phone to theft six months later — restored everything on the replacement in a tap.
Freelancer
I invoice clients in three currencies. Having USD, GBP, and INR on the home screen saved me from three Google searches a day.
Backpacker
Works perfectly on a battered Android in a Bolivian hostel with no Wi-Fi. That's the whole test.
Solo traveller
The stale-rate badge is the feature no one talks about. You always know whether you're looking at fresh numbers.
Expat
Paid the lifetime on day one. Lost a full phone to theft six months later — restored everything on the replacement in a tap.
Freelancer
I invoice clients in three currencies. Having USD, GBP, and INR on the home screen saved me from three Google searches a day.
Backpacker
Works perfectly on a battered Android in a Bolivian hostel with no Wi-Fi. That's the whole test.
Traveller — Tokyo
Landed at midnight with a dead SIM. This was the only thing that still told me what ¥15,000 meant at the taxi rank.
Digital nomad
I hop between five countries a year. Widgets on the home screen for my four most-used pairs — perfect.
Frequent flyer
Finally an app that actually works on the plane. That is literally the one moment I need it.
Small-business owner
Batch mode saves me ten minutes every time I price across markets. Small thing — adds up fast.
Traveller — Tokyo
Landed at midnight with a dead SIM. This was the only thing that still told me what ¥15,000 meant at the taxi rank.
Digital nomad
I hop between five countries a year. Widgets on the home screen for my four most-used pairs — perfect.
Frequent flyer
Finally an app that actually works on the plane. That is literally the one moment I need it.
Small-business owner
Batch mode saves me ten minutes every time I price across markets. Small thing — adds up fast.
Traveller — Tokyo
Landed at midnight with a dead SIM. This was the only thing that still told me what ¥15,000 meant at the taxi rank.
Digital nomad
I hop between five countries a year. Widgets on the home screen for my four most-used pairs — perfect.
Frequent flyer
Finally an app that actually works on the plane. That is literally the one moment I need it.
Small-business owner
Batch mode saves me ten minutes every time I price across markets. Small thing — adds up fast.
Solo traveller
The stale-rate badge is the feature no one talks about. You always know whether you're looking at fresh numbers.
Expat
Paid the lifetime on day one. Lost a full phone to theft six months later — restored everything on the replacement in a tap.
Freelancer
I invoice clients in three currencies. Having USD, GBP, and INR on the home screen saved me from three Google searches a day.
Backpacker
Works perfectly on a battered Android in a Bolivian hostel with no Wi-Fi. That's the whole test.
Solo traveller
The stale-rate badge is the feature no one talks about. You always know whether you're looking at fresh numbers.
Expat
Paid the lifetime on day one. Lost a full phone to theft six months later — restored everything on the replacement in a tap.
Freelancer
I invoice clients in three currencies. Having USD, GBP, and INR on the home screen saved me from three Google searches a day.
Backpacker
Works perfectly on a battered Android in a Bolivian hostel with no Wi-Fi. That's the whole test.
Solo traveller
The stale-rate badge is the feature no one talks about. You always know whether you're looking at fresh numbers.
Expat
Paid the lifetime on day one. Lost a full phone to theft six months later — restored everything on the replacement in a tap.
Freelancer
I invoice clients in three currencies. Having USD, GBP, and INR on the home screen saved me from three Google searches a day.
Backpacker
Works perfectly on a battered Android in a Bolivian hostel with no Wi-Fi. That's the whole test.