Apps to Download Before a Vietnam Trip 2026: What Works on a Foreign Number
Grab, Google Maps offline, Translate offline and Zalo are the short list. MoMo and ZaloPay need a Vietnamese number, so plan your QR payments before you fly.
Quick answer: For a first-time visitor setting up a phone the week before flying, the short list is Grab, Google Maps with the Vietnam region downloaded, Google Translate with the offline Vietnamese pack, and Zalo if a hotel or guide asks for it. GrabBike hops run around 15,000 to 30,000 VND (US$0.60 to US$1.20) as of mid-2026, per Day Trips Vietnam, and both Grab and Be accept a foreign number and a foreign card.
Key takeaways
- Two ride apps, not one. Xanh SM held 54.51 percent of Vietnam's app-taxi market in Q1 2026 against Grab's 40.92 percent and Be's 4.57 percent, per Day Trips Vietnam, so keeping two installed hedges surge pricing.
- MoMo and ZaloPay are not realistic on a short trip. Both need a Vietnamese phone number or bank account, so a visitor cannot fund them, per Day Trips Vietnam's app table.
- QR-first is real. Cafes, convenience stores and many street vendors display a QR code instead of a card reader, per whatappdoineed.com, so arriving with no way to scan one means cash only.
- Install and sign in before you fly. Several apps send a one-time SMS code to verify the account, which is easier on home Wi-Fi before you swap SIMs, per whatappdoineed.com.
You fly in a week. You have been told to install Grab, Google Maps and Google Translate, and you have also been told that half the apps locals actually use will not work on your foreign number or your foreign card. Both are true, and the difference decides whether your first hour in Hanoi is a taxi you booked or a counter you cannot pay at.
Here is the short list worth installing before you fly, what each one needs to work, and the one payment problem no app store listing warns you about: the shop that only takes a QR code, and the wallet behind that QR code that a short-term visitor cannot open.
Which apps should I install before I fly to Vietnam, and which can wait until I land?
Install Grab, Google Maps with the Vietnam region downloaded, Google Translate with the offline Vietnamese pack, and your eSIM app before you fly. Several of these send a one-time SMS code to verify your account, and that is far easier to handle while you still have home Wi-Fi and your home SIM in the phone.
| App | What it does | Works on a foreign number and card | Install |
|---|---|---|---|
| Grab | Rides, food, parcel delivery, in-app card payment | Yes | Before you fly |
| Be | Bikes, cars, bus and train tickets | Yes | On arrival |
| Xanh SM | All-electric taxi and bike fleet | Yes | On arrival |
| Google Maps | Navigation, offline region download | Not required | Before you fly |
| Google Translate | Text, voice and camera translation | Not required | Before you fly |
| MoMo | Local wallet and QR payment | Vietnamese number needed | Not realistic |
| ZaloPay | Local wallet and QR payment | Vietnamese number needed | Not realistic |
Does Grab work on a foreign phone number and a foreign card in Vietnam?
Yes. Grab works on a foreign phone number and a foreign card, and it is the one app that genuinely matters. A short GrabBike hop and a cross-town GrabCar are both quoted before you confirm, with the fare shown in the app, according to Day Trips Vietnam in mid-2026.
Some foreign debit cards fail verification, which is a known quirk rather than a fault in your account. Link a card or top up the in-app wallet before you land so you can pay cashless. Drivers do take cash, but hunting for exact change is a daily annoyance you can skip.
The reason Grab matters is pricing, not convenience. A quoted fare removes the negotiation that used to define arriving anywhere in Vietnam, in English. You can also use GrabFood inside the same app, with frequent coupon codes that cut your order total, per Viet Unfold in 2026.
Why do MoMo and ZaloPay not work for a short trip, and what do I use at a stall that only takes a QR code?
MoMo and ZaloPay need a Vietnamese phone number and usually a Vietnamese bank account to fund them. Short-term visitors do not have either. Many travellers try linking an international Visa or Mastercard, which works for a growing share of merchants, but the wallet itself is not realistic for a two-week trip.
Vietnam has gone overwhelmingly QR-first. Almost every cafe, convenience store and a surprising number of street vendors display a QR code instead of, or alongside, a card reader, according to whatappdoineed.com in 2026. At a stall that only takes a QR code, you can pay from a USDT balance you already hold using QR Pay in the Fizen app. Scan the local QR code, see the amount in Vietnamese dong before you confirm, and pay. QR Pay is non-custodial, works from USDT on Solana and BNB, and KYC applies. It is for foreign travellers in Vietnam only. A Vietnamese person in Vietnam cannot use it.
What does a local SIM or eSIM cost in Vietnam, and which one do these apps actually need?
Every app on this list works best with active data in Vietnam. Local SIM cards from MobiFone, Viettel or Vinaphone are sold at airport kiosks and typically include 2 to 6 GB of daily data, according to Viet Unfold in 2026. You need your passport to register a local SIM, and airport kiosks are the easiest place to buy one. The shop page carries the current price.
eSIM plans run from 10 GB over 30 days to unlimited over 15 days, per Viet Unfold in 2026. Buy online before departure and activate on arrival, with no physical card and no passport queue. Most phones since 2018 support eSIM, so check your device before committing. The shop page carries the current price.
QR Pay needs working data, so sort your eSIM before you fly. The same USDT balance that funds QR Pay also buys the travel eSIM in the Fizen app.
Do I need Zalo, and will it register on a foreign number?
Zalo is Vietnam's dominant messaging app, and hotels, tour guides and drivers often use it instead of WhatsApp. But registering Zalo on a foreign number is hit or miss. According to a 2026 guide from Day Trips Vietnam, Zalo works inconsistently with foreign numbers, and they classify it as 'only if asked' rather than essential. Another 2026 guide from WhatAppDoINeed says Zalo is 'non-negotiable' for coordination, but warns that verification SMS codes are easier to handle before you swap your SIM.
| App | Foreign number registration | When to install | Source |
|---|---|---|---|
| Zalo | Inconsistent, SMS code may not arrive | Before you fly, with home SIM | Day Trips Vietnam, 2026 |
| Works with any number | Before you fly | Google Play listing, 2026 | |
| Facebook Messenger | Works with any number | Before you fly | Google Play listing, 2026 |
Which apps work offline when the signal drops in Ha Giang or Phong Nha?
In remote areas like Ha Giang or Phong Nha, mobile data can disappear entirely. Two apps save you: Google Maps and Google Translate. Both let you download offline packs before you go. According to a 2026 guide from Kampatour, Google Maps offline maps are 'a lifesaver in remote areas' and should be downloaded before heading to places like Ha Giang or Phong Nha where data signals drop out. The same guide notes that Google Translate's offline Vietnamese pack 'gets you through 80% of situations'.
Grab, Be and Xanh SM all require live data to book rides, so they will not work offline. If you are on a motorbike in Ha Giang and your signal drops, you need a paper map or a downloaded offline map. For translation, the camera function in Google Translate works offline once the language pack is installed.
- Google Maps: download the Vietnam region or specific cities before you fly. Works offline for navigation and saved places.
- Google Translate: download the Vietnamese offline pack. Camera translation works without data.
- Grab, Be, Xanh SM: require live data. No offline mode.
- Zalo: requires data for messaging. No offline mode.
Frequently asked questions
Do I need a Vietnamese phone number for Grab?
No. Grab works on a foreign number and a foreign card, and the fare is quoted before you confirm. Some foreign debit cards fail verification, which is a known quirk rather than a fault in your account.
Can I use MoMo as a tourist?
Not realistically on a short trip. MoMo and ZaloPay both require a Vietnamese phone number or bank account to fully fund the wallet, so most visitors cannot set them up.
What if the shop only takes a QR code?
Vietnam is QR-first, so this happens. If you hold USDT on Solana or BNB, QR Pay in the Fizen app lets you scan the local code and pay, with the amount shown in dong before you confirm.
Is Zalo worth installing before I go?
Only if a hotel, homestay, tour guide or driver asks for it. Zalo is Vietnam's dominant messaging app and many businesses coordinate bookings there instead of WhatsApp.
Do the apps work without data?
Google Maps and Google Translate work offline if you download the Vietnam region and the Vietnamese language pack first. Grab, Be, Xanh SM and Zalo all need live data.
Set up QR Pay before you fly
QR Pay lives in the Fizen app and works for travellers in Vietnam, paid from a USDT balance on Solana or BNB. New users get eSIM credit the first time they open the eSIM tab, valid 12 months, applied automatically in the app.
Terms and conditions
- Information only. This article is information only, not an offer or sale, and not financial, legal or tax advice.
- For readers in the United States. This is information only, not an offer or sale, and not advice. Fizen is not offered to US Persons.
- Data only. QR Pay is a data-only payment method for travellers and foreigners in Vietnam and the Philippines. It is not available to residents of those countries.
- Self custody. You keep your keys and the balance is yours. Nobody can restore a lost recovery phrase.
Sources
- Day Trips Vietnam, Vietnam Travel Apps 2026
- whatappdoineed.com, Vietnam Travel Apps 2026
- Viet Unfold, 10 Best Vietnam Travel Apps 2026
- Kampa Tour, 10 Must-Have Apps for Traveling in Vietnam 2026
- Vietnam With Me, Best Apps for Vietnam Travel
- We Wanderlust, Vietnam Apps 2026
- Google Play
- Apple App Store
All facts and prices were checked on 06 October 2026.
