Updated way to sync your Obsidian vault to an Android phone using Git. Previous method can be found here.

Here’s the procedure to sync your Obsidian vault to an Android phone.

First, you’ll have to run these commands on your computer:

1. Create a SSH key using ssh-keygen -f ~/obsidian-phone-key -t ed25519 -C "your_email@example.com"
2. Add the public key (~/obsidian-phone-key.pub) to your GitHub account
3. Connect your phone to your computer and allow the computer to access phone data
4. Copy the private key (~/obsidian-phone-key) to your phone

Now, on your phone:

1. Install F-Droid
2. Open F-Droid and install Termux
3. In Termux, install git using pkg install git
4. In Termux install termu-am using pkg install termux-am
5. Mount the phone storage using termux-setup-storage
6. Copy your SSH key into ~/.ssh/ using cp ~/storage/shared/path/to/obsidian-phone-key ~/.ssh/
7. Now go to the location you want to clone the repository (should be in ~/storage/shared/ for Obsidian to have access) and clone it using git clone git@github.com:username/repo.git
8. You can now open Obsidian
   1. Open folder as vault
   2. Browse to the repository you copied from your computer
9. Open F-Droid and install MGit
10. From the settings page of MGit, import the SSH key
    1. SSH Keys
    2. Download button in the upper right corner
    3. Select obsidian-phone-key you copied from your computer
11. Go back to the main menu of MGit, press the three dots in the upper right and press the Import Repository button
12. Browse to the repository you copied from your computer
13. You should now be able to pull from MGit
14. Your Obsidian vault is now synced using Git!
15. (Optional) If you want to also be able to manage the repository from Termux, run the command git config --global --add safe.directory ~/storage/shared/path/to/repo