(App) How do I first sign‑in on the mobile app?

This article shows new users how to sign in to the Day.io mobile app for the first time. First‑time sign‑in activates your account so you can clock your working hours.

You need to install the app, enter your mobile phone number, verify an SMS code and allow notifications and location access so the app can work properly. Only employees who already exist in the company database can complete the sign‑in.

Key actions or configuration

1. Install the app
   • Open your device’s app store and search for Day.io – Time Tracking.
     • Version to Android devices here;
     • Version to iOS devices here.
   • Install the official Day.io app and tap Open when done.
     
     
2. Enter your mobile phone number
   • On the Welcome screen, select the appropriate country code if needed.
   • Type your full mobile number, including area code.
   • Tap Next to proceed.
     • Tip: If your company offers corporate authentication, a Sign in with SSO button appears under the phone field. Use it to log in with your company credentials.
        
3. Verify the SMS code
   • After entering your number, Day.io sends a verification code via SMS.
   • Enter the code into the on‑screen field to confirm your identity.
   • If you don’t receive the code, check your network and tap Resend code to request another one.
      
4. Grant permissions
   • The app prompts you to allow notifications, which serve as reminders to clock in and out. Tap Allow.
   • Next, you’re asked to grant location access. Choose Allow while using the app so Day.io can record your location when you clock in.
      
5. Access the day schedule
   • Once permissions are granted, the day schedule screen displays your work schedule for that day (more details here).

What should I do when the message “This phone number is not registered in our system” appears or you changed your phone and can't access it?

When entering your phone number, the app may display the following message:

This phone number is not registered in our system. Please contact your HR department.

This message indicates that the number entered does not match the phone number currently linked to your employee profile.

First, confirm that you entered the following information correctly:

• Country code;
• Area code;
• Full mobile phone number.

If the number is correct and the message continues to appear, contact your HR department or the person responsible for managing Day.io at your company. Only this person can review and correct the information in your profile.

Tell your HR department whether:

• You are still using the same phone number but changed devices; or
• You also changed your mobile phone number.

Based on this information, the responsible person can follow the appropriate procedure to authorize the new device or update the registered phone number. First-time access to the app requires a phone number that is already linked to the employee’s profile.

Tips or troubleshooting

• If the SMS never arrives, verify that your number is correct and wait a few minutes before resending.
• Denying location or notification permissions may prevent some features from working. You can grant them later in your device settings.
• If the app freezes, close and reopen it. Reinstall if the problem continues.

Best practices

• Always use a valid mobile number to avoid delays in account activation.
• Enable notifications so you never forget to clock in or out.

Frequently asked questions

1. Do I have to use my personal phone number?
   The app links your account to your number and sends you a verification code via SMS. Check the best option with your HR department.
2. Can I use corporate SSO instead of SMS?
   If your employer enables SSO, you’ll see a Sign in with SSO button on the welcome screen. Otherwise, SMS is required.
3. I left the verification screen accidentally. Do I have to start over?
   Reopen the app, enter your phone number again and a new code will be sent.