Best Apps to Download Before Your Trip to Hungary
By Kata | katabudapest.com | Published Oct 12, 2026
The best time to set up your phone for Europe is on your couch at home, not in the arrivals hall with 4% battery and no signal.
I've been a licensed private guide in Budapest for over a decade, and I can usually tell within five minutes of meeting guests who prepared their phone and who didn't. The prepared ones walk out of the airport, tap a button, and their ride is on the way. The others are hunting for Wi-Fi, getting a text from their carrier about roaming charges, and wondering why Uber looks different here.
The good news: you need about a dozen apps, most of them free, and one quiet evening to set them up.
1. Stay Connected
eSIM App for Europe
Sort out mobile data first, because every other app on this list depends on it. Daily roaming passes from US carriers add up fast on a two-week trip, and hunting for a SIM card shop on arrival day is nobody's idea of a holiday.
An eSIM is a digital SIM card you buy in an app and install over Wi-Fi at home. You land, switch it on, and you have local data within a minute.
A discount if you go with Airalo: it's the eSIM I use on my own trips, and my code ‘KATA0908’ takes $3 off your first eSIM. It's a referral code, so Airalo sends me a small thank-you when you use it.
Before you buy, check two things: your phone must be carrier-unlocked, and it must support eSIM (most phones from the last five years do).
My setup tip: install the eSIM at home, but keep your regular line active for calls and texts with data roaming turned off.
WhatsApp: the app Europe actually runs on
Europeans don't text, they WhatsApp. Guides, drivers, small hotels, apartment hosts and many restaurants will message you there. Set it up at home with your normal number and it keeps working on your eSIM data. It's how I stay in touch with my own guests before and during their trip.
2. Maps and Navigation Apps for Europe
Google Maps is still the single most useful travel app in Europe, as long as you download your cities for offline use before you leave. Walking directions, public transport routes, opening hours and restaurant reviews in one place. Download an offline map for every city on your route, so you can navigate even when your signal drops in a metro tunnel or a thick-walled old town.
My local tip: before the trip, save your hotel, your meeting points and every restaurant you've booked as pins in a Google Maps list. When you're jet-lagged at 7 a.m., "tap the star" is about all the navigation you'll manage.
One honest warning from a guide: walking times on any map app feel optimistic once hills, stairs and cobblestones get involved.
3. Train, Bus and Flight Apps
Three names cover most trips between Central European cities: FlixBus for buses, and Railjet and RegioJet for trains.
FlixBus – the bright green long-distance buses that link hundreds of European cities, and often the cheapest way to get from one capital to the next. Your ticket lives in the app, and you show the QR code to the driver.
Railjet (ÖBB app) – Railjet is the fast, comfortable Austrian train, and the classic way to travel between Budapest, Vienna, Salzburg and Munich. Budapest to Vienna takes about 2 hours 40 minutes. Buy tickets in the ÖBB app, and book early for the lowest fares.
RegioJet – the yellow trains and buses of a private Czech company, connecting Budapest, Vienna and Prague. Fares stay low even at short notice, every ticket includes a reserved seat, and you can change or cancel in the app.
Flying Wizz Air or Ryanair?
If your route includes a budget flight, download the airline's own app. Check in on your phone and keep your boarding pass there, because doing it at the airport desk costs extra.
A fair warning for my American guests: the seats on these airlines are much smaller than what you're used to in the USA. Legroom is tight, the seats don't recline, and the bag size rules are enforced to the centimeter. For a one- or two-hour hop it's fine. Just know what you're booking.
My local tip: between Budapest, Vienna and Prague, the train beats flying every time. You travel from city center to city center, with no security line and a proper seat. For trains inside Hungary, see MÁV+ in the Budapest section below.
4. Taxi and Ride-Hailing Apps That Work in Europe
Uber works in many European cities but not all of them, so download at least one backup before you fly.
Uber – available in a long list of European cities. In several countries it dispatches licensed local taxis rather than private drivers, so prices follow the regulated taxi tariff.
Bolt – the European answer to Uber, and often the bigger player in Central and Eastern Europe, the Baltics and Portugal. If you download only one extra ride app, make it this one.
Set these up at home. Ride apps verify your account with a text message and a payment card. That is easy on your couch and annoying on a curb outside the airport.
My local tip: the classic taxi scam in any European city starts with someone approaching you inside the terminal. Real drivers don't solicit. Order through an app or walk to the official taxi rank, and you remove almost all of the risk.
Budapest Taxi Warning: Skip Freelancer Cabs! Use Uber or Bolt!
5. Money, Payment and Currency Apps
Your phone's tap-to-pay wallet is the most important money app in Europe, and you already have it.
Apple Pay or Google Wallet – contactless payment is the norm here, from metro gates to market stalls. Add a card with no foreign transaction fee before you leave.
Wise – the easiest way to exchange money for a Europe trip. Convert dollars to euros, forints or pounds in the app at the real mid-market rate, with a small fee shown upfront, then spend with the Wise debit card or your phone. Also handy for ATM withdrawals and for paying deposits to small European businesses. No exchange booth needed. Ask me for my promo code before you sign up: it gives you zero fees on a transfer of up to 400 EUR (460 USD).
Your own bank's app – make sure you can log in abroad, freeze a lost card and see transactions in real time.
Two rules I repeat to every guest:
When a card terminal or ATM asks whether to charge you in dollars or in the local currency, always choose the local currency. The "convenient" dollar option comes with a poor exchange rate.
Use ATMs attached to real banks, not the standalone machines parked next to souvenir shops.
6. Translation App
You can get by with English in most European cities, but a translation app turns menus, pharmacy labels and train notices from guesswork into information.
Google Translate – download the offline language pack for each country on your route. The camera mode translates menus and signs when you point your phone at them, and conversation mode helps at the pharmacy counter.
7. Other Great Apps for Budapest
If Budapest is on your route, add these local apps.
BudapestGO – the official app of BKK, Budapest's public transport company. Plan routes, see live departures, and buy tickets and travel passes on your phone, including the ticket for the 100E airport express bus. No ticket machine, no coins, no confusion.
MÁV+ (MÁVPlusz) – the Hungarian railway app, available in English. Buy train and intercity bus tickets for day trips to Lake Balaton, Szentendre, Esztergom or Eger without queuing at the station.
Your Pre-Flight Phone Checklist
Do these ten things the week before you leave, on home Wi-Fi, and your phone is ready for Europe.
Confirm your phone is unlocked and supports eSIM.
Buy and install a Europe eSIM, then switch its line on when you land.
Set up WhatsApp with your regular phone number.
Download offline Google Maps for every city on your route.
Download offline Google Translate packs for every language you'll meet.
Create accounts and add a payment card in Uber or Bolt.
Add a no-foreign-fee card, such as a Wise card, to Apple Pay or Google Wallet.
Download your airline app and one train booking app.
Save your hotel addresses, tickets and tour confirmations where you can open them offline.
Pack a power bank and a European plug adapter. The best app in the world is useless at 0% battery.
FAQ: Apps for Traveling in Europe
What apps do I need for a trip to Europe? Most travelers need about a dozen: an eSIM app, WhatsApp, Google Maps, Google Translate, Uber and Bolt, a train app, your airline's app, a tap-to-pay wallet, Wise for money exchange, and a currency converter. Add one local transport app for each city, like BudapestGO in Budapest.
Does Uber work in Europe? Yes, in many cities, but not everywhere, and in some countries it sends a licensed taxi at the regulated fare. Download Bolt as a backup, since it's often the larger service in Central and Eastern Europe.
Do I need an eSIM for Europe? You don't need one, but it's usually the cheapest and easiest way to get mobile data. One regional Europe eSIM covers most countries on a typical itinerary, and you install it at home before you leave.
Does Google Maps work offline in Europe? Yes. Download each city as an offline map while you're on Wi-Fi, and walking and driving navigation will work without a data connection. Live public transport times still need data.
Do I need an app to enter Europe in 2026? No. The EES border system has been fully operational since April 2026, but registration happens at the border and requires no app. ETIAS, the EU's planned online travel authorization, is not in operation yet as of October 2026.
What apps do I need in Budapest? BudapestGO for public transport tickets and routes, Bolt or Uber for taxis, MOL Bubi for bike sharing, Wolt for food delivery, and Google Maps with the city downloaded offline. Add MÁV+ for day trips by train.
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