# Mobile Companion eSIM — Japan eSIM: 5G travel data

> Japan eSIM: 5G travel data (iPhone/iPad app by Japan Companion LLC.)

- Source: https://appshunter.io/ios/app/mobile-companion-esim/id6795708406 (this page in markdown: same URL + `.md`)
- Developer: [Japan Companion LLC](https://appshunter.io/developer/6795708408)
- Category: Travel, Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 15.0 · 62 MB
- Languages: American English, French (France)
- Released: 2026-08-17
- Data updated: 2026-11-06

## What is Mobile Companion eSIM?

Your Japan eSIM at a low price, ready before you fly.

Choose your data, pay in the app and install your eSIM at home in 1 minute: you’re online as soon as you land. No subscription, no hidden fees, no SIM card to hunt for at the airport.

THE RIGHT PRICE
• Plans in every size: a few GB for Maps and messaging, much more for video
• Your plan starts at your first connection in Japan, not when you buy it: buy early, you won’t lose a day
• Need more data? Top up the same eSIM in the app
• Our prices next to the big eSIM brands, checked and dated: mobile-companion.com/en/compare

A CONNECTION THAT WORKS
• NTT docomo’s 5G network, with a Japanese IP address: unlike your usual plan abroad, your data doesn’t detour through your home country
• It connects by itself as soon as you switch off airplane mode
• Your usual SIM stays in place for calls and texts
• Share your connection with your other devices
• A real person replies on WhatsApp, 24/7, in English or French

EVERYTHING IN THE APP
• Checks that your phone is compatible before you buy
• Your remaining data and validity at a glance, also in a widget
• An alert when you’ve used half your data, then when you’re running low
• Pay by card or Apple Pay, sign in with email, Google or Apple
• The same account as on mobile-companion.com

HOW IT WORKS
1. Choose your Japan plan
2. Pay securely
3. Install your eSIM at home, over Wi-Fi
4. Land: it connects by itself

A question before or during your trip? Message us on WhatsApp from the app, any time.

## Is Mobile Companion eSIM safe?

Not enough ratings yet to assess Mobile Companion eSIM.

## Is Mobile Companion eSIM legit?

Mobile Companion eSIM has limited verification signals. The AppsHunter Legitimacy Score for Mobile Companion eSIM is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 1.0.9 — 2026-11-05

Bug fixes.

### 1.0.8 — 2026-10-30

Bug fixes.

### 1.0.7 — 2026-10-26

Bug fixes.

### 1.0.6 — 2026-10-21

Bug Fix

### 1.0.4 — 2026-09-28

Track your plan

Usage alerts: the app lets you know when you have used half of your data, then when you are running low, even when it is closed. If your plan is used up and a top-up is available, it offers you one.
Data allowance and usage shown exactly as reported by the operator.
Validity shown in days, in English and French. An unreliable countdown is no longer shown.
Network shown as "4G/5G", included country shown with its flag and name.
eSIM statuses translated (ready to install, in use, expired…) with icons.
Top-ups

After a top-up, your new allowance appears straight away, marked "being activated", until the operator confirms it.
A second notification tells you when the top-up is active.
A failed or unconfirmed payment is never shown as successful.
Your eSIMs

Expired eSIMs can be removed from your list.
Cancellation is only offered for an eSIM that can really be cancelled, never for a top-up.
Account and help

Edit your name from your profile.
Show or hide your password while typing.
Referral code checked before you pay.
Support: message us directly on WhatsApp from the app.
Reliability and security

More reliable plan catalogue, even on a poor connection, with plans sorted from smallest to largest.
Stronger protection of your data and stability fixes.

## Apps similar to Mobile Companion eSIM

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [SefereSIM: eSIM Travel Data](https://appshunter.io/ios/app/seferesim-esim-travel-data/id6801062903) | — | Free | Travel |
| [Le Crès](https://appshunter.io/ios/app/le-cres/id1580287147) | — | Free | Travel |
| [e-eSIM — Mobile Data](https://appshunter.io/ios/app/e-esim-mobile-data/id6781611540) | — | Free | Travel |
| [Ikuzo](https://appshunter.io/ios/app/ikuzo/id1467333634) | 5.0 (2) | Free | Travel |
| [Guidly: Travel AI Guide & Map](https://appshunter.io/ios/app/guidly-travel-ai-guide-and-map/id6738176358) | — | Free | Travel |
| [Ginko Access](https://appshunter.io/ios/app/ginko-access/id6448988466) | — | Free | Travel |

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-06.*