COCOA User Reviews

COCOA - COVID-19 Contact App
COCOA - COVID-19 Contact App
Ministry of Health, Labour and Welfare - Japan

Top reviews

ダウンロードさえ出来れば入国できる?

米国でアプリを開くとNetwork Connection Errorがでる。調べると、日本のネットワークにつながればエラーがなくなるらしい? だったらなぜそう書かない? これでどんだけの人間が不便を被ると思ってる? ユーザー目線ゼロの役立たずのアプリ。

Network Connection Error

If you want to (or must) use the Exposure Notification system on iOS in Japan, you must use this app. If you attempt to register in the app before you arrive, you will get an unhelpful “Network Connection Error”.

The app will not let you proceed unless you are connected via a Japanese network. Note that international roaming on a foreign cellular network will not work. You must connect via a WiFi network in Japan or via a Japanese cellular network.
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Network error outside Japan

The Japanese government is so incompetent with a lot of things but especially with anything IT. This app is one of those examples. This app's network error message needs to let people know that this happens when they try to use it outside Japan.

Just a annoyance

You are forced to download this app when you enter Japan and won’t do anything afterward.

Network Error

When I try to register it says network error

Nobody checked if this app was installed before entering Japan

I just came back to Japan, and the government webpage asked everyone to install this app. I had the same issue with network connection, and a bit worried if it would affect going through the immigration process.
However, at the airport they did not check if this app was installed. They checked another app, MySOS, but didn’t care about COCOA. I guess they know this app is full of problems and useless.
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Ridiculous.

Just make HCQ or Ivermectin available already at the pharmacy or kiosks as over the counter drug. This kind of waste should not have existed.

論外

登録以前に、アプリが開きません。

It doesn’t work

It keeps telling me that there is network issue when there isn’t … it doesn’t even start.

Version 1.4.0 Crashes When Run <— Fixed!

They did a good job delivering a fix in one day.

Error for registration

Mine cleared up the next day and I was able to get everything working prior to departure. Make sure that your device is running the latest firmware update.

Does not work

Network error even when in Japan.

Can only access within Japan

Yes, I tried from US but same Network error message showed up as many of reviewers.

When I checked the Japanese site, it said 本アプリは日本国内での利用を想定しています。(my broken translation: This app assumes usage within Japan.

So, even though Japanese government would like us to prepare/register ahead of our arrivals, it’s impossible to do so from outside of Japan.

I’m hoping this situation will be resolved quickly.
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Network Connection Error

Due to travel restrictions because of Covid, you are required to download and use this app but you can even pass & agree to the “Term of Use” -
“Network Connection Error”. Nothing is wrong with the connection. Everyone seems to have the same problem…

Network connection error issue resolved

A lot of people in reviews comments they have network connection error after accepting terms of use. The Japanese Ministry of health website said you cannot use it if you are not in Japan. I assume you will be able to use it once you landed in Japan.
I hope this helps many of you having this issue.

Can’t use won’t work

It says my network connection is unavailable when trying to agree to the terms of service

日本に帰れない

空港でこのアプリがないと日本に入れないと言われたが、チケットをもらう前にこのアプリがフリーズして飛行機に乗れなかった。今まだ日本に帰れないし次のチケットは一ヶ月後、学校の初めを見逃さないといけない。

Won’t Accept Terms of Use

We loaded this on both our iPhones, but it won’t accept the Terms of Use. It keeps saying that there’s a “Network connection error”. I promise you that our network connection is fine. We get the same response on both phones.

Network Connection Error

It’s required for my return to Japan, but it won’t allow me to agree to the terms of use due to a network connection error.

No real instructions

I’ve had this app since arriving in Japan 2 days now. I don’t see a change in the days of use or how to download the other apps for my quarantine status. Hello please