COCOA app not working? crashes or has problems?

COCOA Status

Last Updated on 2022-11-17 by Ministry of Health, Labour and Welfare - Japan

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User reports:
No current problems

User reports 0

Summary of COCOA Problems 🔥

- Screen grabs are all in Japanese

- Unreliable

- Doesn't affect immigration process

📋 2 Reported Issues:

George Brendecke 2022-05-24

I arrived in Japan from Australia on 14 May 2022 and was told that I did not need to isolate/quarantine. Can I uninstall COCOA if I want to now? It is using a lot of battery power, probably because of Bluetooth and I cannot use my Mobile Phone for a full day without recharging it. Thanks!

Mathias Schmitt 2022-05-21

Networking not possible

Showing 1-2 of 2 reported issues:

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Common COCOA Problems & Solutions. Troubleshooting Guide

Table of Contents:

COCOA iPhone Issues and Solutions

COCOA iOS app crashes, not working, errors
COCOA iOS app network issues
COCOA on iOS has black/white screen

COCOA Android App Issues and Solutions

COCOA has errors/crashing/not working
COCOA server network connectivity issues
COCOA has black screen

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COCOA iPhone Issues and Solutions

How to fix COCOA app crashes or not working on Iphone (iOS):

Close and restart the COCOA app on iPhone
Update COCOA app to the Latest Version for iOS
Uninstall and reinstall COCOA iPhone app
Update your iPhone to the latest iOS version

Fix COCOA on iPhone unable to connect to server/internet connection issues::

To resolve COCOA network issues, Reset phone network settings:
1. On iphone, goto Settings » General » Reset » Reset Network Settings.
2. Enter device passcode » confirm [Reset Network Settings].

Turn off iphone VPN:
1. Goto Settings » General » VPN

COCOA Android App Issues and Solutions

Fix COCOA not working on Android, crashes, errors or is unresponsive:

Force Stop the COCOA App
1. On android, goto Settings » COCOA » click [Force Stop]

Update COCOA to the latest version on PlayStore

Clear COCOA App Cache and Data:
1. On android, goto Settings » Apps » COCOA » Storage » click [Clear Data] option. This clears both data and cache.
2. restart COCOA.

Fix COCOA unable to contact server/ COCOA internet connection errors on Android:

On android, goto Settings » Apps or Manage Apps tab.
Click COCOA » [Force Stop]
Next, goto Storage » click [Clear Data]
Again, goto COCOA » Mobile Data » [Allow Background Data Usage].
Go back to Settings » Connections » Mobile Network » Network Mode. Change the network to 4G e.g. LTE/3G/2G (auto connect)
Relaunch COCOA