Byteseal Quick Start Guide

Byteseal Quick Start Guide

Introduction

Hey there! Thanks for choosing Byteseal. You're about to set up one of the most secure password managers out there — and the good news is, it's way simpler than it sounds.

By the end of this guide, your passwords will be locked up tight, and filling in logins will be as easy as a tap (or a click). Let's go!

What's in the box?

Your Byteseal Biometric ID (a small fingerprint device that fits in your palm), a charging cable, and a quick-start card. This guide goes into much more detail than that card.

How does Byteseal keep you safe?

Byteseal doesn't rely on just one lock — it stacks multiple layers so that even if someone cracks one, they're stopped by the next:

Notes
  • Phone OTP — A one-time code texted to your phone every time you log in. Think of it as a bouncer checking your ID.
  • Master Key — A 4-digit PIN that only you know. It unlocks your saved passwords.
  • Fingerprint — Your actual fingerprint, verified through the Byteseal Biometric ID device. Can't fake that!
  • Device Possession — You need to physically have the Biometric ID in your hand. No device, no entry.

Why does the setup start on mobile? When you later log in on a computer, Byteseal checks all four factors (phone OTP + master key + fingerprint + device). Your phone is the anchor of this whole chain, so that's where your journey begins.


Get the apps

Byteseal works on Android, iOS, Windows, and macOS. Grab the mobile app first — you'll need it before you can do anything on your computer.

Alert
Byteseal is supported on Android 14 and above, and iOS 26 and above.

On your phone:

  1. Open the Play Store (Android) or App Store (iOS).
  2. Search for "Byteseal Password Manager."
  3. Tap Install or Get and let it download.
  4. Open the app. You'll land on the welcome screen — nice!

On your computer:

The desktop setup needs two apps at once: the Byteseal Desktop App (where you see and manage all your passwords) and the Byteseal Autofill Assist (a small helper that runs in the background and fills in login forms for you).

  1. Head to the Byteseal website and find the download button.
  2. Download the installer for Windows or macOS.
Quote

Windows

  • Unzip the downloaded file.

  • Double-click the setup.exe file.

  • Follow the on-screen prompts to complete the installation.

macOS

  • First, download the ZIP file for the desktop app.

  • Unzip the file and drag and drop the Byteseal Desktop app into the Applications folder.

  • Open the desktop app. It will prompt you to download the Autofill Assist DMG file.

  • Download the DMG file, then double-click it. In the installer window that appears, drag and drop the app into the Applications folder.


    • Once installed:

      • Go to Applications and double-click Byteseal Autofill Assist Mac.

      • The app will prompt you to grant the necessary permissions (such as Accessibility and Input Monitoring) required for autofill functionality.

Idea
On Mac, you can also grant the accessibility permissions by going to Settings > Privacy & Security > Accessibility > '+' > Byteseal Autofill Assist Mac. Also the input monitoring permission can be give by going to Settings > Privacy & Security > Input Monitoring
Alert
Note that the Accessibility and Input Monitoring permissions are purely for the purpose of autofill of credentials. If you do not wish to use the autofill functionality, you can skip giving these permissions. 

Create Your Profile

Time to make your Byteseal account! This only takes a minute, and it all happens on your phone.

Verify your phone number:

  1. Open the Byteseal app on your phone.
  2. Type in your phone number and tap Send OTP.
  3. Check your texts — you'll get a one-time code. Pop it into the app.


Pick your Master Key:

Next, you'll set a 4-digit Master Key. This is the PIN you'll use to unlock your passwords, so make it something you'll remember.

  1. Choose your 4-digit Master Key.
  2. Enter it again to confirm.
  3. Tap Confirm. Done!

Idea
Super important — remember your Master Key! There's no "forgot PIN" button here. Your Master Key can't be reset. Write it down and keep it somewhere safe. But don't stress too much — even if someone finds it, they still need your phone and your fingerprint to get in.

Save your first password:

Your account is ready! Let's save your first login.

  1. On the home screen, tap the "+" button in the bottom-right corner.
  2. Fill in the website or app name, your username, and password.
  3. See the Mandatory Biometric Authentication toggle? If you flip it on, this password will only unlock with your fingerprint device. Great for banking or email.
  4. Tap Save. Your first credential is locked away safely! 


AlertThe “Mandatory Biometric Authentication” toggle will only be visible if a biometric device has already been registered in your profile. If you don’t see this option, follow the next step to add biometric authentication to your profile.

Idea
Which passwords need biometric protection? Turn it on for the important stuff — bank accounts, primary email, cloud storage. For lower-risk logins (like that recipe blog), master-key-only access is faster and still very secure.


Set Up Your Biometric ID

This is the fun part — let's pair your fingerprint device and teach it who you are.

Connect the device:

  1. In the Byteseal app, tap the Device tab at the bottom of the screen.
  2. Grab your Byteseal Biometric ID and hold the power button for 3 seconds. You'll see a light come on.
  3. Back in the app, tap Connect. It'll find your device and pair up automatically.
  4. You'll see a "Device Connected" message. High five!




Info
🤔 Why does the button need a long press? It's on purpose! A 3-second hold stops the device from switching on and off accidentally if you're fidgeting with it or it bumps around in your bag.

Enrol your fingerprints:

  1. Tap Enrol Finger.
  2. Pick a hand (left or right) and choose which finger to scan.
  3. Place your finger on the sensor. The app will ask you to lift and place it a few times to get a good read.
  4. Want to add more? You can enrol up to 5 fingers total. Repeat the process for each one.


Turn On Autofill

This is where the magic happens. Instead of typing passwords every time, Byteseal fills them in for you. The setup is a little different on each platform, so jump to the section that matches your device.

5.1 Android

First, tell your phone to use Byteseal:

  1. Open your phone's Settings.
  2. Search for "Autofill" in the search bar.
  3. Go to Passwords & Autofill (the name might look slightly different on your phone).
  4. Set the autofill service to Byteseal Password Manager.
  5. Turn off any other autofill services so they don't fight for control.


Next, set up Chrome:

  1. Open Chrome on your phone.
  2. Tap the three-dot menu (⋮) and go to Settings.
  3. Find Autofill Services (or Passwords).
  4. Choose "Autofill using another service." This tells Chrome to hand off to Byteseal.


Now, try it out!

  1. Visit a website you've saved a password for.
  2. Tap the login field. You'll see an autofill suggestion pop up.
  3. Tap "Autofill using Byteseal." Pick the right credential from the list.
  4. If that credential needs biometric authentication, you'll be asked to connect your Biometric ID and scan your fingerprint. Go ahead — it only takes a second.
  5. Tap the credential and boom — you're logged in!


5.2 iOS

Enable Byteseal in your iPhone settings:

  1. Open Settings on your iPhone.
  2. Go to Passwords → Password Options.
  3. Turn on AutoFill Passwords and Passkeys.
  4. Under "Allow Filling From," enable Byteseal. Disable any others.

Regular passwords (non-biometric protected passwords):

Super straightforward:

  1. Go to a login page in Safari or any browser. 
  2. Tap the login field. 
  3. Tap Passwords from the bar above your keyboard.
  4. Pick the right credential, enter your Master Key, and you're in!

Biometric-protected passwords:

For passwords that need your fingerprint, there's one extra step:

  1. Go to the login page and tap Passwords from the keyboard bar. You'll see your biometric-protected passwords greyed out.
  2. Switch over to the Byteseal app (don't close your browser).
  3. Connect your Biometric ID device, then tap Authenticate and scan your fingerprint.
  4. Hop back to your browser and tap Passwords again. The greyed-out passwords are now unlocked!
  5. Select the one you need, enter your Master Key, and you're done.


IdeaWhy the extra step on iOS? Apple doesn't let third-party apps trigger hardware authentication directly during autofill. So you need to pop into the Byteseal app to verify your fingerprint first. It's a small detour, and we're working hard to make it smoother in future updates.

5.3 Windows & macOS


Logging into Desktop app

Byteseal handles login for desktop apps differently, with a strong focus on both security and convenience. Since desktops are generally less private than smartphones, an additional level of verification is required before granting access to your data.

To ensure account ownership, Byteseal verifies your identity through your registered mobile device. When you open the desktop app, you will be prompted to enter your registered phone number. After entering the number, a push notification will be sent to the device where your Byteseal account is logged in. You can then approve the request on your phone to complete the login process.


      

Autofilling on Desktop


Desktop autofill uses the Byteseal Desktop App and the Autofill Assist helper working as a team.

Start the Autofill Assist app:

  • Windows: It starts on its own when you open the Desktop App. Nothing to do here!
  • macOS: You'll need to open Autofill Assist manually by going to Applications and double clicking the app icon. You can also select 'Login at start' option for this app by 'control + click' on the Byteseal Autofill Assist icon in the top bar of your Mac. 

Fill in a login:

  1. Open the Byteseal Desktop App and find the credential you want.
  2. Click the Launch icon (a little arrow) on the right side of that credential. Two things will happen: a browser window opens with the website, and a small Autofill Assist window pops up with matching credentials.
  3. In the Autofill Assist window, pick the credential you need.
  4. Click the Pen icon (✎) next to the field you want to fill (e.g., username).
  5. Click inside the matching field on the website. The value gets filled in automatically!
  6. Repeat for the next field (e.g., password). Click pen icon, click field, done.


Alert
💻 Windows users: small difference! On Windows, after clicking the pen icon, use Ctrl + Left Click (instead of a regular click) inside the browser's login field to trigger autofill.

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