How to use it (ChipChecker 2.0)


Download chipchecker.apk using your browser within Android.

*For more detailed instructions, see Downloads.

This is a so-called “installer”; it is not from an official Android location (Google Play Store), so you may get a warning that it may be dangerous.

*If you are afraid to download it here, please read about Android app safety issues. Even if this were a “dangerous app,” the combination of the permissions you grant and the information you enter determines whether it is dangerous or safe. No app, no matter what it is, will ever be uniformly dangerous.

Even a suspicious Android app is not immediately dangerous. Depending on the permissions you grant to the app and what you enter into the app, a “malicious app” can be dangerous.


Once the download is complete, run it with “Open”. If you do not see the “Open” menu, go to the downloads folder in your Android, find chipchecker.apk, and tap on it.



Install the downloaded chipchecker.apk. As shown in the previous screen, you can install it by “Open” or, if this menu does not appear, tap the chipchecker.apk in the “Download folder”.


Depending on the version of Android, location must be turned on in order to use Bluetooth. With “do not allow,” there is no detection at all.

After completing the above settings, the application will close, but an icon will be created, so you can start it up again from here.

How to use

When you start the app, you will see the following display. Of course, this is when there is a Bluetooth device or someone around who appears to be an vaccinated.

In this case, black represents regular Bluetooth devices (other smartphones, headphones, keyboards, etc.) and red represents the vaccinated. In other words, the Bluetooh signal is emitted from both the regular Bluetooth device and the chip in vaccinated, both of which are detected and color-coded.

Red indicates an intra-body chip, black indicates a regular Bluetooth device.

*Not shown above, but may be green. This is from COCOA, the contact monitoring app.

In the following explanations, we will distinguish between the regular “device” and “chip” in vaccinated.


When the application is launched, it performs a device and chip scan, or detection operation, but if the “SCAN” button is pressed, it will scan for a set number of additional seconds (see below, 15 or 60 seconds) and add the found devices or chips to the list.

Press the SCAN button to detect chips (or devices) around you for a set number of seconds.


*Ignored if the “SCAN” button is pressed during scanning.

Pressing the “CLEAR” button will clear all chips once found. Then click “SCAN” to scan for chips again.

However, you can also use the settings described below to “find chips only”. Naturally, since we are not interested in the “device” we can ignore them.

Setting Menu

In the upper right corner is the so-called hamburger menu.

This menu is separated into three parts.

The hamburger menu (three dots) contains various setting options.


All, Chip, All Near, Chip Near

The default is “All”. You can select one of four modes. Once selected, the device will be detected in that mode from then on.

  • All: Lists all devices and chips; RSSI (see below) is the maximum scan range of the terminal’s performance.
  • Chip: Ignores devices and lists only chips; RSSI is the maximum scan range of the terminal’s performance.
  • All Near: All devices and chips; RSSI can be set as described below.
  • Chip Near: Chip only; RSSI can be set in the manner described below.

In “Chip Near” mode, only chips are detected and the signal strength (RSSI) to be detected can be selected; a smaller RSSI will detect only those who are close.


Choose whether to set the scan time to 15 seconds or 1 minute. This relates to how many chips will be detected if a human is passing around.

If the person is stationary in the room, the number of detections should not be relevant. Also, scanning four times in 15 seconds and once in 60 seconds have the same theoretical effect, but the actual detection results seem to be different.


The RSSI setting is only enabled for “All Near” and “Chip Near”. In “All” and “Chip” this setting is ignored and is the maximum scanning range of the terminal performance.

The RSSI setting indicates how strong a signal is to be detected. For example, if a person with the exact same type of chip were to be nearby, the signal strength would be different than if the person were far away.

The higher the RSSI value of the chip checker, the more it will respond to chips that are further away.

You can select the signal strength when in “All Near” or “Chip Near” mode. Smaller values will detect only those people who are close to you.



Summary of usage

For very normal use, we are not interested in other bluetooth “devices” first, and would like to test the change in detection by changing the RSSI setting, so the following settings are good.

  • Chip Near: to be able to select RSSI. Not interested in “equipment”, only chip detection.
  • ScanSec: Set to your preference
  • RSSI: Set to your liking. For example, if you want to detect only those who are close to you, reduce the value.

About the color of the displayed rows

Red: The “chip” here, which indicates the inoculator. However, just because a person is a vaccinator does not necessarily mean that it is detected; it may not be in there for some reason or it may be missing. Also, it is not necessarily one for each vaccinator. Perhaps in the case of multiple vaccinations, more than one chip is detected from one person.

Black: represents normal Bluetooth devices. It may be interesting to understand how many Bluetooth devices are around.

Green: Signal emitted by COCOA, a contact monitoring application backed by the Ministry of Health, Labor and Welfare, and the signal itself is the same as that of the chip. However, for the Android version, devices that have newly installed COCOA after the release of the chip checker will be displayed in red.

After the release of the chip checker, newly installed COCOA terminals will be displayed in red. Please understand.