Best Apps for Currency Conversion
You are standing in a market in Bangkok. A seller says something costs 900 baht. Your brain immediately starts doing terrible math.
“900... okay, that is... maybe $9?
This is exactly why a good currency converter is useful when travelling.
You can use one to check a restaurant bill, compare hotel prices, see how much cash you are spending, or quickly decide whether that “great deal” is actually a great deal.
Not every currency app is built for the same thing.
Some work offline. Some track exchange rates. Some let you compare several currencies at once. Others go beyond conversion and let you actually hold, exchange, or spend different currencies.
So here are currency conversion apps worth knowing, starting with a few lesser-known options before getting to the big names.
1. Koin: Best for a Clean, Ad-Free Travel Converter
Koin is another small travel-focused option, particularly for iPhone users.
It offers 160+ currencies, offline conversion, automatic rate updates, favorites, and a simple interface. The app also focuses on comparing several rates quickly rather than filling the screen with financial features.
The interesting part is that it is positioned as an ad-free experience.
Why it is useful
Sometimes you really do not need a complicated financial app. You just want to type “1,500” and know what that means in your home currency.
Best for
iPhone users
Travelers who want an uncluttered app
Offline use
Quick shopping calculations
People who dislike ads
One limitation
It is currently much less established than apps such as XE or Wise, so there is a smaller user base and less of an ecosystem around it.
2. Wise: Best for Checking the Real Mid-Market Rate
Wise is slightly different from most apps on this list.
It is not just a currency converter. It is also a money transfer and multi-currency account platform.
Its converter currently supports 140 currencies and shows the mid-market exchange rate. You can also track rates, save favorite currencies, view historical charts and set rate alerts.
This makes it useful when you are trying to understand whether a bank, exchange counter or card is giving you a reasonable rate.
Why it is useful
You can check the current mid-market rate on Wise before deciding whether that offer is reasonable.
The number you see in a converter is not necessarily the number you will receive after fees, but it gives you a useful benchmark.
Best for
Checking exchange rates
Sending money internationally
Holding multiple currencies
Travelers who use Wise cards
Comparing provider rates
One limitation
Wise's services and features vary by country. Also, its mid-market converter rate is a reference rate, not a guarantee of what a cash exchange counter or card transaction will charge.
3. OANDA Currency Converter: Best for Detailed Exchange Rate Data
OANDA is better suited to people who want more than a quick “how much is this in rupees?” answer.
It is a long-standing foreign exchange data provider, and its currency tools are useful for checking historical and current exchange rates.
This can be useful if you are planning a longer trip and want to understand how a currency has moved over time rather than looking at today's number alone.
Why it is useful
Currency rates change constantly.
If you are planning to exchange a large amount of money, checking historical movements can give you more context than looking at one rate on one afternoon.
Best for
Detailed rate research
Frequent international travelers
People tracking exchange rates before a trip
Business travelers
Historical comparisons
One limitation
It is more data-heavy than most casual travelers need.
If you just want to know what €20 costs in INR while standing outside a restaurant, OANDA may feel like bringing a spreadsheet to lunch.
4. XE Currency: Best All-Round Currency App
XE is one of the most established names in currency conversion.
Its app lets you compare more than 100 currencies in real time, view charts, set rate alerts and access international money transfers. XE says its converter uses mid-market rates for informational purposes.
You can also look at historical currency movements and set an alert for a rate you are waiting for.
Why it is useful
It works well when currency conversion is not just a one-time travel question.
For example, if you are travelling to Europe in three months, you can watch the EUR exchange rate before your trip instead of checking it randomly every few days.
Best for
Frequent travelers
Rate alerts
Historical exchange rates
International transfers
People who want one established currency app
One limitation
XE's converter rate is an informational mid-market rate. The rate you receive when sending money can be different.
5. Revolut: Best for Converting and Spending Money Abroad
Revolut is less of a traditional currency calculator and more of a travel money app.
Depending on the market and plan, you can exchange and hold multiple currencies, spend abroad with a Revolut card, and see exchange rates and applicable fees in the app. Revolut currently says its app supports the exchange of 36 currencies in its global product, while its Indian offering has its own country-specific rules and features.
You can also check rates directly in the app before making an exchange.
Why it is useful
If you are actually spending money abroad, a converter alone is not enough.
Revolut lets you go from checking the rate to holding or spending the currency, depending on your country and account eligibility.
Best for
Frequent international travelers
Multi-currency spending
Travel cards
People who want conversion and payments in one app
Travelers who already use Revolut
One limitation
Features, currencies, fees, and card availability vary by country and plan. In India, for example, Revolut's travel-card and currency features are subject to local rules and eligibility.
Which Currency Converter App Should You Use?
There is no reason to download all 10. Pick one based on what you actually need.
If you want a tiny offline converter, try XChange or Koin.
If you want a simple travel app for checking prices, Travel Currency Converter+ is worth considering.
If you need lots of currencies, try Easy Currency Converter.
For iPhone and simple conversions, My Currency Converter & Rates is a good option.
If you want multiple currencies, charts, and a calculator, go with Currency Converter Plus.
If you want to compare rates before actually exchanging money, check Wise.
For historical and detailed currency data, OANDA is the more research-heavy option.
If you want an all-rounder with alerts and transfers, XE remains a strong choice.
If you want to convert, hold, and spend money abroad, look at Revolut, provided its features are available in your country.
What to Check Before Choosing a Currency App
The biggest mistake is choosing a currency app based only on the number of currencies it supports. That number looks impressive, but it may not matter when you are standing in a supermarket in Paris.
Instead, check a few practical things.
1. Does it work offline?
This is one of the most useful features for travel. You may lose mobile data after landing, walk into a basement restaurant or visiting a remote village.
An offline converter can still help you understand prices, but remember that an offline conversion normally uses a previously downloaded or cached rate. It is not necessarily the latest market rate.
2. Does it show the rate or the actual cost?
These are not always the same thing. A converter may show a mid-market rate, while your bank, card provider, ATM, or exchange counter may add a fee or markup.
For example, Wise explicitly describes its displayed rate as the mid-market rate, while XE says its converter rate is for informational purposes and that the sending rate can differ.
3. Can you compare several currencies?
This is especially useful for multi-country trips. If you are travelling through France, Switzerland, and Hungary, keeping EUR, CHF, and HUF beside your home currency saves you from repeatedly changing the app settings.
4. Can you set rate alerts?
You may not care about exchange rates changing by a tiny amount every day, but if you are exchanging a larger amount before a trip, an alert can save you from constantly checking the app. XE and Wise both offer rate-alert features.
One Travel Tip That Can Save You Money
There is one thing currency apps cannot protect you from if you are not paying attention. Dynamic currency conversion.
You may use your card abroad and see a screen asking whether you want to pay in your home currency or the local currency.
In many cases, choosing the local currency is the better option because the merchant or ATM is then not doing the currency conversion for you. Revolut's own travel guidance recommends choosing the local currency rather than accepting dynamic currency conversion when paying abroad.
So if you are in Japan and the terminal asks:
¥8,000 or ₹4,900?
Do not automatically choose the rupee amount just because it looks easier. Check the rate and understand who is doing the conversion.
Final Thoughts
A currency converter is one of those travel apps you may open 20 times on one trip and completely forget about once you get home, and that is fine.
You do not need a complicated financial platform just to check whether a taxi costs $500 or $1,500.
For most travelers, the important features are simple: accurate reference rates, offline access, quick conversion, and an interface that does not make you work for the answer. Choose the app that matches your trip.
Then save it somewhere easy to find because when someone hands you a restaurant bill in a currency you barely recognize, you want the answer before your brain starts converting everything into potatoes.
FAQs
Q. What is the best currency converter app for travel?
For most travelers, XE, Wise, and Currency Converter Plus are strong choices, but they serve different purposes. XE is useful for alerts and rate information, Wise is useful for checking mid-market rates and international money services, while Currency Converter Plus focuses more on quick travel conversion and offline use.
Q. Which currency converter app works offline?
Several apps offer offline conversion, including XChange, Travel Currency Converter+, My Currency Converter & Rates, Easy Currency Converter and Currency Converter Plus. Offline mode generally uses the most recently available or cached exchange rate, so it may not reflect the current market rate.
Q. Is Wise better than a normal currency converter?
It depends on what you need. Wise is useful if you want to check mid-market rates and may also send, hold, or spend money internationally, while a simpler converter can be faster if you only want to check the price of something.
Q. Can I trust currency converter apps for the exact amount I will pay?
Not always. A converter usually shows a reference exchange rate, while your bank, card, ATM, or cash exchange provider may add fees or a markup. Always check the actual rate and fees before exchanging or paying.
Q. Should I use a currency converter while travelling without internet?
Yes, if the app supports offline conversion. It is particularly useful when you have just landed, are travelling without a data plan, or are somewhere with weak connectivity. Just remember that an offline rate may be older than the current market rate.
Q. Do I need a currency converter if I already have a travel card?
It can still be useful. A travel card may handle the actual payment, but a separate converter helps you understand whether a hotel, meal, taxi, or shopping price is reasonable in your home currency.
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