FAQs | 1LimX

How does this work?

The app will generate a unique master key (you can also use your own 256-bit key), and combine it with your master password to encrypt your data using the industry-standard 256-bit encryption, chosen by Google: ChaCha20-Poly1305, all happening 100% offline on your device if you want.

What does the master key do?

The encryption key used to encrypt your data is derived from your private master password. However, the password itself is only plain text. This master password is then combined with a unique master key to create a 256-bit encryption key that is considered impossible to break for ChaCha20-Poly1305.

How is master key generated and is it secure?

Your master key is unique and secret (secret like the master password), please keep it somewhere safe.

You can use your own 256-bit encryption key, please make sure it is in HEX encoding to use with 1LimX.

If not, 1LimX will generate a random unique 256-bit encryption master key using what the operating system itself offers:

crypto.randomBytes on PC. Under the hood, it is /dev/urandom on MacOS, Linux and CryptoGenRandom on Windows.
SymmetricKey.init on iOS
KeyGenerator.generateKey on Android

They have been tested and proven mathematically and practically. All are offered natively, ensuring the best performance and security.

What happens to my data?

Your data will never leave your machine if you choose to use 1LimX only offline. 1LimX can work entirely offline, allowing you to disable internet access within the app and still use it without a problem. The only internet usage is for checking your premium status and data synchronization with your own cloud storage (Google Drive).

If you use sync feature, rest assured that the data leaving your machine are encrypted using the industry-standard 256-bit encryption, chosen by Google: ChaCha20-Poly1305 with your master password and master key (which never leave your device) as encryption key.

Since this is your own cloud storage (Google Drive), you are in full control of the encrypted sync data, along with the added security provided by Google.

What happens to my master password, master key?

Your master password and master key never leave your device whether you use 1LimX only offline or sync over your own cloud storage (Google Drive).

If your device system has a secure storage it'll stay there(iOS, macOS use Keychain, Android uses encrypted Shared Preferences, Windows uses Credential Vault, Linux uses Secret Service API/libsecret), if not only encrypted version of master key is stored and you must remember the master password.

If the app is uninstalled or if you set up FaceID/TouchID then one day FaceID/TouchID is not working you will not be able to access again unless you have saved these credentials somewhere else!

What if I lose my master password, master key?

If you lose your master password or master key, you'll lose access to the data you input into 1LimX, including text, files processed in Custom Data Encryption, and all generated 1LimX backups (even those in your cloud storage if you use the sync feature).

This is because your data is encrypted with your master password and master key. These credentials are combined into one encryption key, so losing either or both means losing access to your encrypted data.

Particularly, losing the master key (a 256-bit key generated by 1LimX using your device's operating system functions) means you can't brute-force guess it. Even with quantum computing, using Grover's algorithm, a 256-bit key's security is reduced to 128-bit, which remains practically impossible to brute-force.

Since your master password and master key are not stored on our 1LimX server or any online database, it’s crucial to save these credentials securely. To view them, open the 1LimX app and navigate to Settings → See master key.

What is an 1LimX backup file? Is it encrypted?

1LimX backup file is an encrypted file generated by 1LimX app that packs all your data into one single sharable file. You can share and access your data in other computers where 1LimX is also installed with the file.

So YES, backup files are encrypted just like the data you enter into 1LimX by ChaCha20-Poly1305, for secure data transfer.

The sync files created in your cloud storage (Google Drive) are 1LimX backup files. If you encounter issues with syncing your data, simply download these files and drag them into Settings → Backups.

Is 1LimX app open source?

We open-sourced the most important part of our app which is the encryption part. You can view the source at https://github.com/1limxapp.

How can I sync encrypted data across multiple devices?

There are 2 options below. Both offer 100% privacy and security with end to end encryption. Make sure 1LimX app is installed on all devices.

I. Your own Google Drive

1. Text-based automatic sync

Because of their size, this option cannot sync file and image fields. Ensure that in all devices, the SAME MASTER PASSWORD, MASTER KEY are being used.

In the PC app, you can enable text-like data syncing on the Sync screen in the left sidebar.

In the mobile app, you can enable text-like data syncing when swiping down from the top in the list of items, categories, or templates, opening the top-right corner ellipse menu in items screen or in Settings → Sync screen.

2. Manual all data sync

Sync everything (including large data like files, images) you put into this app with just a click

You can do it by using the DOWNLOAD and UPDATE ALL local data and UPLOAD ALL local data changes buttons which can be found in Settings → Sync screen, top right corner ellipsis icon (on mobile) or Sync Options modal in Items screen (on PC).

II. Local

Sync everything you put into this app locally.

1. Transfer encrypted data from iOS iPhone/iPad to MacOS device

The process is the same for transferring encrypted data from an iOS/iPadOS device to a Windows/Linux device.

Or, to transfer from a macOS, Windows, or Linux device to an iOS, iPadOS device, simply transfer the encrypted backup file to the 1LimX folder on the target iOS, iPadOS device. The 1LimX app will automatically detect it → tutorial section.

2. Transfer encrypted data from MacOS device to iOS iPhone/iPad

The process is the same for transferring encrypted data from a Windows/Linux device to an iOS/iPadOS device.

Or, to transfer from iOS/iPadOS device to MacOS, Windows or Linux device, simply transfer the encrypted backup file to destination device then drag it to 1LimX app Settings screen → Backups → tutorial section.

3. Transfer encrypted data from Android device to MacOS device

The process is the same for transferring encrypted data from an Android device to a Windows or Linux device.

Or, to transfer from a MacOS, Windows or Linux device to an Android device, simply transfer the encrypted backup file to the 1LimX folder on Android, 1LimX app will automatically detects it.

Deleting data and restoring deleted data on this device in text-based sync

1. When you delete an item, category, or template, it will be deleted from the text-based sync data in your cloud storage (Google Drive). However, locally on all devices with internet connected, it will be moved to Trash.

This allows you to recover accidentally deleted data (as long as you don't delete them from Trash, since deleting from Trash is permanent).

2. When you delete an item tex field or a template (without changing the template title) field, it will be deleted from the text-based sync data in your cloud storage (Google Drive).

If this happens accidentally, you can only recover the deleted field if all your devices are synced to the latest data before the deleting action.

Then on other devices, open the item or template containing the field and make a temporary edit to any text fields (eg: title field) or toggle a field sensitivity. Save the item with internet connected, the deleted field will be re-added to the text-based sync data then update the text-based data on this device.

Deleting files and images and restoring deleted data on this device in all data sync:

DOWNLOAD and UPDATE ALL local data and UPLOAD ALL local data changes buttons mentioned below can be found in 1LimX app Settings → Sync screen, top right corner ellipsis icon (on mobile) or Sync Options modal in Items screen (on PC).

To restore deleted files and images on this device through all data sync if all devices have previously synced all data, and after the files/images field deletion on this device, the all data sync file in your cloud storage (Google Drive) is now outdated with the item(s) on this device that previously contained those files/images (because the files/images deletion action has updated the item(s)), try 1 of these 5 solutions:

1. When you delete an item containing file or image attachments, the item won't be deleted from the all data sync file in your cloud storage (Google Drive). However, it will be moved to the Trash locally on all devices with internet connected.

If you accidentally delete it, you can restore from Trash any time (as long as you don't delete them from Trash, since deleting from Trash is permanent).

2. When you delete file, image attachments (fields) inside an item, they won't be deleted from the all data sync file in your cloud storage (Google Drive) but will be deleted completely from local disk of the device making the deletion after saving the item.

This solution works if the all data sync file remains unmodified after the files/images deletion, meaning you haven't clicked/tapped UPLOAD ALL local data changes since the files/images deletion.

Then, on another device that still has the files/images, sync text-based data first. Next, open the item containing the deleted file or image attachments in edit mode, from there, click/tap on the pen icon next to the it's field name then check the restore this file/image on other devices through all data sync? checkbox and click/tap OK.

Save the item and wait for the automatic text-based sync to complete. Finally, on this device, just click/tap DOWNLOAD and UPDATE ALL local data to restore them.

In this solution, ensure that the internet is connected for automatic sync to apply new changes immediately before you download all sync data on this device.

3. Simply download that file from your cloud storage (Google Drive) (all_data_google_drive_manual_sync.1limx) and drag or browse it into the Settings → Run Backup screen to perform a backup merge.

This solution works if the all data sync file remains unmodified after the files/images deletion, meaning you haven't clicked/tapped UPLOAD ALL local data changes since the files/images deletion.

4. Completely delete the local item from the Items and Trash screen that previously contained the deleted files/images, then just click/tap DOWNLOAD and UPDATE ALL local data.

This solution works if the all data sync file remains unmodified after the files/images deletion, meaning you haven't clicked/tapped UPLOAD ALL local data changes since the files/images deletion.

Before deleting from Trash, make sure the new files/images and text-based data in that item, are saved somewhere else and are not uploaded to your cloud storage (Google Drive).

Because if the field names of the new file/image in that local item are the same as the ones that need to be restored on this device in the corresponding item on your cloud storage (Google Drive) and you upload them FIRST, they will override the files/images used for restoration in your cloud storage, the new files/images will become the latest synced data of those fields and causing this solution to fail.

5. If you have already clicked/tapped UPLOAD ALL local data changes since the deletion, it means the file/image to be restored was deleted from the sync file in your cloud storage (Google Drive) and from this local device.

To restore the file/image on this device:

1. On another device that still has the file/image, click/tap "UPLOAD ALL local data changes" to make it appear again in your cloud storage (Google Drive).

2. Click/tap "DOWNLOAD and UPDATE ALL local data" to restore the file/image.

Is there a web version?

No, we care about your peace of mind, so it does not involve an online server to transfer your data back and forth.

Another reason to make it work offline is to utilize the full potential of computing power for large-sized data encryption.

So can I autofill on the web?

Yes! 1LimX has the autofill feature for most browsers on mobile versions.

On PC, you can use the 1LimX autofill extension:

Chromium-based browsers: Install

Firefox: Install

Edge: Install

There is also an option in the app to export passwords to a CSV file for import to and use for autofil in Chrome, Firefox, Edge, Brave,... and vice versa.

How much does it cost to use 1LimX?

We offer a premium and a free version of the 1LimX app. The free version offers unlimited items, making it a great choice for many users. Learn more at https://1limx.com/pricing.

Does the premium plan require separate purchases for each platform?

No! Upgrading to 1LimX Premium only requires a one-time purchase on any platform. Your premium features will be unlocked on all platforms, regardless of where you purchase it (license key, Apple Store, or Play Store in-app purchase, subscription).

Just be sure to restore your purchase using the email you used for the purchase in the Settings -> Try PREMIUM screen within the 1LimX app:

Important:

Please note that on Android or iOS, add your purchasing email address in Settings > App data info within the 1LimX app. This is necessary for the PC version to recognize your premium status when restoring your purchase:

Not finding what you want?

If not please contact us at support@1limx.com

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