A Complete Guide to Managing Door Codes on Your Phone

Published: Mar 24, 2026

You bought a smart lock for the keyless convenience, but its real magic isn’t just on the keypad—it’s in the app on your phone. Imagine this: a family member arrives for a surprise visit while you’re at work. Instead of leaving your office, you simply open an app, create a new code for them, and send it in a text. Or picture giving your weekly dog walker a code that only works between 1 PM and 2 PM on weekdays.

This level of control is the true power of your electronic door lock, and it’s all managed through its mobile app.

But if you’re new to this, the app can feel a bit overwhelming. What’s the difference between “guest access” and “recurring access”? How do you know who used their code and when? You’re not alone in asking these questions.

This guide is your friendly walkthrough. We’ll demystify the technology, show you the core concepts for managing codes on any smart lock app (like August, Kwikset Halo, or Schlage), and share best practices to keep your home both accessible and secure.

Foundation: How Your Phone Talks to Your Door

A diagram showing a phone connecting to a smart lock via Bluetooth for local control and via Wi-Fi and a cloud server for remote control.

Before we dive into the app, let’s have a quick coffee-chat about how this all works. Your phone and your smart lock have a conversation using two primary languages: Bluetooth and Wi-Fi.

Bluetooth: This is for close-range communication. When you’re standing near your door, your phone uses Bluetooth to talk directly to the lock. It’s fast, secure, and doesn’t rely on your home internet. This is how features like “auto-unlock” work when you approach your own door.
Wi-Fi: This is your long-distance connection. Your smart lock connects to your home’s Wi-Fi network, which then connects to the internet. This allows you to lock, unlock, and manage codes from anywhere in the world—whether you’re at the office or on vacation.

Think of it like this: Bluetooth is for talking to your lock from the driveway, while Wi-Fi is for talking to it from another country.

Building: A Visual Guide to Managing Access Codes

Chart comparing smart lock apps—August, Kwikset, Schlage, and Yale—by guest access, notifications, and integrations.

While the exact button layout may vary between brands like Kwikset, Yale, or August, the core process for managing codes is remarkably similar. The “aha moment” for most new users is understanding the types of access you can grant.

Let’s break down the process and the different types of codes you can create.

Step 1: Navigating to the User Management Screen

First, open your smart lock’s app. You’ll typically see an icon for your front door lock on the home screen. Tap on it. From there, look for an icon or menu option that looks like a person or a group of people. This is usually labeled “Guests,” “Users,” or “Manage Access.” This is your command center for all user codes.

Step 2: Adding a New User and Choosing an Access Type

Once in the user management screen, you’ll see an option to add a new user, often represented by a “+” icon. Tapping this will begin the process of creating a new code. The most important choice you’ll make here is the type of access.

Here are the most common options, framed for real-world scenarios:

Permanent Access (The Family Member): This code works 24/7 with no expiration date. It’s perfect for family members, trusted roommates, or anyone who needs unrestricted access.
Scheduled/Recurring Access (The Dog Walker or Cleaner): This is where smart locks get brilliant. You can create a code that only works on specific days and during specific times. For a house cleaner who comes every Tuesday from 10 AM to 1 PM, their code will be inactive any other time. This gives you control without having to constantly enable and disable their access.
Temporary Access (The Contractor or Airbnb Guest): This code has a clear start and end date/time. It’s ideal for granting short-term access. You can give a plumber a code that works for the next three hours, or an Airbnb guest a code that is only active for the duration of their stay. Once the time is up, the code automatically expires.

Step 3: Assigning and Sharing the Code

After selecting the access type, the app will either auto-generate a code or ask you to create one. You’ll then associate this code with a name (e.g., “Mike – Plumber”). The app makes sharing easy—you can typically send the code directly to the person via text message or email right from the app.

⚠️ Common Mistake: When setting a temporary code, double-check that you’ve selected the correct start and end times, paying close attention to AM and PM. It’s a simple error that can cause a frustrating lockout.

Step 4: Editing or Deleting a Code

Plans change. If you need to revoke access, simply navigate back to the user management screen, find the user’s name, and you will see options to either edit their access schedule or delete their code entirely. The change is nearly instant, giving you immediate peace of mind.

Mastery: Best Practices for Smart Lock Security & Management

Infographic roadmap for smart lock security: strong codes, access audits, notifications, and battery checks.

Managing codes is easy, but managing them securely is crucial. Think of yourself as the friendly security manager for your home.

Here are a few pro-tips:

Create Secure, Non-Obvious Codes: Avoid using codes like “1234,” “1111,” or your street address. Mix up the numbers to make them harder to guess.
Perform a Quarterly “Access Audit”: Every few months, open your app’s user list and review who has access. Did a contractor finish a job a month ago? Does a former guest still have an active code? Take a moment to delete any codes that are no longer needed.
Use the Activity Log: Most smart lock apps have an activity feed that shows you which code was used and when. This is an incredibly powerful tool for knowing who is coming and going. If you get an alert that a code was used at an unexpected time, you know instantly.
Enable Notifications: Turn on push notifications in your app. This way, your phone will alert you in real-time when a specific code is used, giving you awareness and peace of mind.

Action: The Ultimate Smart Lock App Troubleshooting Checklist

A visually appealing checklist graphic for troubleshooting smart lock app problems, including checking Bluetooth, Wi-Fi, battery, and app updates.

Even the best technology can have hiccups. Before you get frustrated, run through this quick checklist. Most issues are common and easily solved.

What to Do If… Your App Can’t Find Your Lock.

Check Bluetooth: Make sure Bluetooth is enabled on your phone.
Get Closer: Stand within a few feet of the lock to ensure a strong Bluetooth connection.
Restart the App: Close the smart lock app completely and reopen it. This often forces it to rescan for the lock.

What to Do If… A User’s Code Isn’t Working.

Check the Schedule: Open the app and verify that the code is being used within its designated time frame. This is the #1 reason for guest code failures.
Verify the Code: Confirm with the user that they are entering the correct digits.
Check the Lock’s Battery: A low battery can sometimes prevent the lock from accepting new commands or codes. Most apps have a battery level indicator.

What to Do If… You Can’t Manage the Lock Remotely.

Check Your Home Wi-Fi: Is your home internet connection down? If so, you won’t be able to connect to the lock remotely.
Check the Wi-Fi Bridge/Module: Many locks use a small plug-in bridge to connect to Wi-Fi. Make sure it’s plugged in and has a steady connection light.
Check App Permissions: Ensure your phone’s settings allow the app to use Wi-Fi or cellular data.

Frequently Asked Questions

What happens to my smart lock if the power or Wi-Fi goes out?

A: Your smart lock will still work! It operates on batteries, so a power outage won’t affect it. And since the codes are stored directly in the lock’s memory, the keypad will function normally even if your Wi-Fi is down. You just won’t be able to manage it remotely from your app until the connection is restored.

Can I use the August app to control my Kwikset lock?

No. Each smart lock brand has its own dedicated mobile app. You must use the app developed by the manufacturer of your specific lock.

Are smart locks safe from hacking?

Reputable smart lock brands use high-level encryption (similar to online banking) for communication between the lock, the app, and their servers. While no system is 100% immune, the security protocols used make them very difficult to compromise. The biggest security risk often comes down to user habits, like using simple, easy-to-guess codes.

Your Partner in Smart Home Security

Mastering your smart lock app transforms it from a simple key replacement into a sophisticated home access management tool. You now have the power to control who enters your home, and when, right from the palm of your hand.

Getting the most out of these features starts with a solid foundation. A professional smart lock installation & setup ensures your lock is physically secure and properly calibrated to communicate with your app without glitches. If you ever run into an issue that a troubleshooting checklist can’t solve, an expert in lock repair can diagnose the problem quickly.

As you build out your smart home, remember that your lock can be part of a larger ecosystem, often integrated with a home security camera (CCTV) installation to give you visual confirmation of who is at your door. At Sure Lock & Key, we believe in empowering you with the knowledge to feel secure. Whether you’re just starting your smart home journey or need a hand with a tricky installation, our family is here to help yours.

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