Apps & tools
The Only 7 Apps You Actually Need for Japan (and 6 You Can Skip)
Search "apps for Japan" and you'll get lists of 20–25 downloads, as if you're provisioning a spacecraft. Then you land in Tokyo and discover you use about five of them. Japan travel forums have noticed the same thing — the loudest recent trend among experienced travelers is un-recommending things. So here's the honest version: what you actually open every day, what's already built into your phone, and what to leave in the app store.
The seven
1. Google Maps — but know its two blind spots
Navigation, train routes, restaurant discovery: it's the default for a reason. Two Japan-specific blind spots to plan around: inside huge stations it treats the station as a dot (the walk from "arrived" to your actual exit can be 10+ minutes — trust the physical signs over the blue dot underground), and small-restaurant opening hours are unreliable because owners close irregularly. When dinner matters, confirm by other means.
2. Google Translate — with the offline pack downloaded
Download the Japanese offline pack before you fly; that's the whole tip. Camera mode handles printed menus and signs well. Where it fails: handwritten izakaya menus, glare on order tablets, and loud rooms for voice mode. When it fails, pointing and smiling has a 100% success rate.
3. Suica — which for iPhone users is not an app at all
The single most under-communicated fact in Japan travel: iPhones have had Suica built into Apple Wallet for years. Add it in Wallet, top up with Apple Pay, tap through every gate — no queue, no app store. Foreign-bought Androids mostly lack the required chip, so get a physical card instead (sales resumed in 2025). Either way, read the money traps before you load it up — tourist-card balances can expire unrefunded.
4. Visit Japan Web — a bookmark, not an app
Half the confusion around Japan's arrival QR system is people hunting the app store for an app that doesn't exist. It's a website: register before your flight, screenshot the QR codes (airport Wi-Fi queues are real), done. Bookmark it and move on.
5. Your eSIM provider's app
Whichever eSIM you buy comes with an app for activation and top-up; you'll want it when something needs a restart. One honest warning from the review trenches: eSIM quality varies wildly by provider and region — travelers regularly report full signal bars with no working data, and refunds are rare once "data was used." Buy from a provider with recent positive Japan reviews, and keep your home SIM active for SMS — your bank's verification codes will thank you.
6. GO (taxi) — install and register before you leave home
Japan's dominant taxi app. Works well in cities; two traps: registration needs an SMS code that data-only eSIMs can't receive (register while you're still on your home SIM), and short-term visitors pay small extra service fees. In the countryside, expect "in service area" to sometimes mean zero actual cars — have the local taxi company's number as backup.
7. For groups: SplitJapan — ours, and also not an app
If you're traveling with friends or family, someone ends up paying for the whole table constantly — Japanese restaurants often won't split bills, and plenty of places are cash-only. SplitJapan is a free web page where one person logs each expense in yen and everyone else just opens a link: balances in each person's home currency, exchange rate locked at entry, one settlement at the end, plus a tracker for the new tax-free refund. We built it, it's free, there's no account and nothing to install — which is exactly why it's on this list instead of a splitting app your friends would have to download.
The six you can skip
| Skip | Why |
|---|---|
| Currency converter apps | One mental anchor does it (¥1,000 ≈ what in your money? memorize that). Your banking app shows exact conversions after each charge anyway — and always pay in yen. |
| Tipping calculators | Japan doesn't tip. Delete, exhale, enjoy. |
| JR Pass calculators | Since the 2023 price hike (+65%-ish), the nationwide pass rarely pays off for typical Tokyo–Kyoto–Osaka trips. If you're not doing long multi-city loops, skip the pass and the calculator both. |
| Dedicated phrasebook apps | Translate covers emergencies; five memorized words (sumimasen, arigatou, kudasai, betsu-betsu, issho) cover culture. Staff would rather see your pointing finger than hear your app's keigo. |
| Wi-Fi finder apps | A dead category — get a decent eSIM and free Wi-Fi hunting becomes irrelevant. |
| A second/third transit app "just in case" | Maps plus one backup (Navitime's route search is genuinely good for rural rail) is plenty. Note: buy actual tickets from official machines/sites, not from third-party resellers whose fees and refund policies have burned many travelers. |
The whole setup, in one paragraph
Maps and Translate (offline pack), Suica in your Wallet, Visit Japan Web bookmarked with QRs screenshotted, your eSIM's app, GO registered from home, and one shared SplitJapan link for the group. That's the kit. Everything else your trip needs is cash in the right amount and a willingness to point at food.
Sources & related reading
- Our deep dives: Suica money traps · card declines · how much cash · the group money playbook
- App capabilities and caveats reflect traveler reports and app-store reviews as of August 2026; apps change fast — check recent reviews before relying on any single one.