How It Works

Record Your Visits

When entering a venue, open the App, click “Enter” to allow access to the camera function of your phone. Scan the specific QR code displayed at the venue.

When you get in a taxi, open the App, click "Get On" and then press "Auto Recognise" to scan the registration mark on the yellow plate shown on the inside of the taxi door or input the registration mark directly.

Press “Leave” when you leave the venue or taxi,. Related record of the visit will be encrypted and stored in your mobile device

Visit records will be erased automatically after 31 days

Report Confirmed Positive or Preliminary Positive

A confirmed COVID-19 patient using the App needs to enter a personal One Time Password (OTP) provided by the Centre for Health Protection (CHP) in the App

Press “Report Confirmed Positive or Preliminary Positive” and upload the encrypted visit records to the CHP for epidemiological investigations

Receive Exposure Notification

Receive notification from the App if users were at the same venue at about the same time with a recently confirmed COVID-19 patient

Notification will contain information on where and when the exposure might have occurred. Health advice will also be sent to users to remind them to take proper precautionary measures, and seek medical treatment if need

Electronic Vaccination and Testing Record

Users may at their sole discretion choose to store their personal COVID-19 vaccination records and testing results together with the QR codes in this app by scanning the QR codes of the vaccination records and testing results with the app.

Users may also download COVID-19 electronic vaccination record with "iAM Smart" to your mobile phone and then add it to "LeaveHomeSafe" app. Please click here to watch the introduction video.

Users will have complete control over the stored information, and may choose to update or remove the information from the app at any time.

Connect to Hong Kong Health Code System

Connect to Hong Kong Health Code System through LeaveHomeSafe

Upload the visit records of LeaveHomeSafe to the Hong Kong Health Code System for the purpose of applying for Hong Kong Health Code

Download The App

Download the LeaveHomeSafe App to help protect the community while protecting your privacy.

FAQ

General:

Q1What is the purpose of “LeaveHomeSafe” mobile app?

Q2Where can I download the “LeaveHomeSafe” mobile app?

Q3Are there any restrictions on using the “LeaveHomeSafe” Mobile App installed by downloading APK from “LeaveHomeSafe” thematic website?

Q4Can I download the app in other countries/regions?

Q5What is the minimum system requirement for installing the “LeaveHomeSafe” Mobile App?

Q6Does the “LeaveHomeSafe” Mobile App take up a lot of data storage?

Q7Does the “LeaveHomeSafe” Mobile App drain my phone’s battery quickly?

Q8Does the “LeaveHomeSafe” Mobile App use a lot of mobile data?

Q9Does scanning venue QR codes with the “LeaveHomeSafe” mobile app require connection to the Internet?

Q10As no user registration is required for the “LeaveHomeSafe” mobile app and the visit records are stored in users’ mobile phones only, then how does the app issue exposure notification to users?

Q11How do we protect our privacy?

Q12Under what circumstances will a user be requested to provide his/her visit records?

Q13Will the app read your data on the mobile?

Q14Why does the mobile app require access permission of “use biometric hardware” and “use fingerprint hardware”?

Q15How to protect the privacy of accessing QR code images of the electronic vaccination and testing records?

Q16If I encounter problems in installing or using the “LeaveHomeSafe” Mobile App , what should I do?

Q17Are there any special requirements for my device to run the dynamic auto-leave function developed by Hong Kong Baptist University?

Q18Under what circumstances may there be an error when using artificial intelligence of the dynamic auto-leave function to identify a passenger’s activity patterns?

Q19Is it possible to transfer the visit records from an old mobile phone to the new one? What should the user do with the records in an old mobile phone when he/she gets a new one?

Usage:

Q20How to use the “LeaveHomeSafe” mobile app?

Q21How to scan the venue’s QR code?

Q22How to scan the taxi registration mark plate?

Q23How to scan the QR codes of vaccination records and testing results?

Q24Can the vaccination records and testing results of other people be kept in the “LeaveHomeSafe” mobile app?

Q25After entering a venue and scanning the venue QR code, how do I scan another venue QR code inside the venue at the same time?

Q26Does the “LeaveHomeSafe” Mobile App record my GPS location data and send them to the Government or other systems?

Q27Can users view or modify their visit records?

Q28How to import QR code images of vaccination and testing records (including photo of paper QR code, QR code image from “iAM Smart”, screen capture)?

Q29How to turn on HKBU’s dynamic auto-leave function?

Q30How the HKBU’s Dynamic Auto-leave work?

Q31On the check-in page, what criteria will the app adopt in showing the QR code of the electronic vaccination record / COVID-19 vaccination medical exemption certificate in blue, or the red box of “No Vaccination Record”?

Q32On the check-in page, the blue QR code of my electronic vaccination record / COVID-19 vaccination medical exemption certificate cannot be fully shown, what should I do?

Q33When I access my electronic vaccination and testing records in the “LeaveHomeSafe” mobile app, the app does not ask for my authentication by biometrics or password, is it normal?

Q34Can I not store my electronic vaccination record / COVID-19 vaccination medical exemption certificate in the LeaveHomeSafe mobile app?

Q35The QR code of my Vaccine Pass record (e.g. electronic vaccination record, medical exemption certificate or recovery record) cannot be scanned by the “QR Code Verification Scanner” mobile app successfully, what should I do?

Q36I have received Sinovac vaccine and saved the vaccination record into the “LeaveHomeSafe” mobile app. However, the vaccine name is shown as “CoronaVac” in the detail section of my electronic vaccination record. Is the vaccination record correct?

Q37What should I do if I have encountered the “Invalid QR code” error when scanning/importing the QR code of my Vaccine Pass records (e.g. electronic vaccination record, medical exemption certificate or recovery record) or testing record into the “LeaveHomeSafe” mobile app?

Q38I cannot import the recovery record QR code into my “LeaveHomeSafe” mobile app, what should I do?

Q39I have stored more than one Vaccine Pass records in my “LeaveHomeSafe” mobile app, how to change the default QR code shown in the check-in page?

For Venue Operators:

Q40How to apply the “LeaveHomeSafe” QR codes?

Q41How long will it take to apply for the “LeaveHomeSafe” QR codes?

Q42Where should the QR codes be displayed in the venue?

Q43How should the venue QR codes be printed for the best scanning effect?

Q44How may venue operators easily distinguish a genuine “LeaveHomeSafe” app from a fake one?

Q45Does the “LeaveHomeSafe” only provide one venue QR code?

Notification:

Q46What is the time interval of exposure notification?

Q47What should I do if I receive the exposure notification?

Q48What should I do if I am identified to have visited the same venue that a confirmed patient has visited at about the same time but do not receive the “LeaveHomeSafe notification”?

Q49Why am I not reminded to undergo compulsory testing in the received notification?

QR Code:

Q50What should I do if I find there is something wrong with the “LeaveHomeSafe” QR code posted at the venue?

Q51What should I do if I encounter the error ‘An error was encountered with scanning this QR code. Please report the name and location of this venue to us by clicking “Report” below or by sending email?”’

Connection to Hong Kong Health Code System:

Q52How to register / apply for the Hong Kong Health Code? Where can I obtain more related information?

Q53Under what circumstances will I be required to upload my visit and notification records to the Hong Kong Health Code System?

Q54What are the requirements for uploading “LeaveHomeSafe” records to the Hong Kong Health Code System?

Q55If I record my visits with more than one mobile phone, can I upload my visit records stored in different mobile phones to my account in the Hong Kong Health Code System?

Q56How frequent do I need to upload my visit and notification records? If there are multiple uploads, will it be resulting in duplicate records in the Hong Kong Health Code System?

Q57After successfully uploading records to the Hong Kong Health Code System, will the system automatically upload these records if the user has given his consent?

Q58I often go out with my family. Can I upload my visit records to my own account as well as the accounts of my family members in the Hong Kong Health Code System?

Q59The “LeaveHomeSafe” mobile app keeps the visit and notification records of the past 31 days. Will all these records be stored in the Hong Kong Health Code System after upload?

Q60How can I check the uploaded records of the Hong Kong Health Code through the “LeaveHomeSafe” mobile app?

Q61When I login to the Hong Kong Health Code System through the “LeaveHomeSafe” mobile app, which mobile phone number will the one-time password (OTP) be sent to via short message service (SMS)?

Q62I have just scanned the QR code of a venue and have not yet clicked the "Leave" button (or the LeaveHomeSafe app has not yet “automatically left” the venue). Will this visit record be uploaded to the Hong Kong Health Code System?

Q63When I login to the Hong Kong Health Code System through the “LeaveHomeSafe” mobile app, why is the function of automatic fill-in of one-time passcode (OTP) sent via short message service (SMS) not working?

Q64I try to update the version of “LeaveHomeSafe” mobile app via Huawei AppGallery. The operating system of my mobile phone asks for my confirmation whether the existing app should be removed in order to proceed the upgrade. What should I do in this case?

Q65I have disabled the function of “Connect to Hong Kong Health Code System” in the “LeaveHomeSafe” mobile app, but the function has been enabled automatically after updating the app to a new version. Is it normal?