I recently moved from Notion to Obsidian and one big problem I’ve had to face was how to sync my desktop instance with my android mobile one without having a paid plan on Obsidian.

After some researches, I discovered how to do it smoothly…

The main tool that I use for my backup/sync is git and specifically, I use a private repo on Github to store my vault.

I don’t have any sensitive information in my vault, so be aware that even tho your vault is inside a private repo, it won’t be encrypted.

Computer

There is an amazing plugin called Obsidian Git which automatically commit and push toward my repo each 10minutes.

Make sure that the Disable push option is deactivated.

It works out of the box if you have already set your credentials on your computer and of course, you always need to initialise your git repo first with

git init
git remote add origin <your repo's address>

Obsidian Git will automatically pull new changes when you start Obsidian, you can also pull it by yourself through the command line or the hotkey ctrl+p searching for “Obsidian Git: Pull”.

I would suggest to put in your .gitignore :

.obsidian/workspaces.json
.obsidian/workspace
.obsidian/cache
.trash/
.DS_Store
.vault-stats

You can just commit and push

git add .
git commit -m "First commit"
git push

Now the Obsidian vault is on Github 🎉

Android

Okay, the vault is online, but how can we sync it on your android mobile phone?

We can install https://termux.com/ to get a Linux shell on your Android, then you can install git and clone the repo.

You can install termux from the Play Store and then execute it, installing and configuring what we need with:

> pkg install git #to install git
> termux-setup-storage #to make storage available

Now let’s configure the Github credentials.

Github credentials

First of all, you need to generate an ssh key for the Android mobile phone

ssh-keygen -t ed25519 -C "email@provider.com"

Don’t add a passphrase, just press enter

If you don’t have ssh installed type

pkg install openssh

Now you need to add the ssh key to the Github’s account, just following these instructions: https://docs.github.com/en/authentication/connecting-to-github-with-ssh/adding-a-new-ssh-key-to-your-github-account

To get the ssh key you can just type on termux cat .ssh/id_ed25519.pub copying the key and pasting it into the key field of Github’s form adding the ssh key to your account.

Once we have followed these steps we can try to clone the repo:

git clone git@github.com:YOUR_USER/YOUR_REPO_NAME.git

and then let’s move it to the shared folder so you can access it from any Android application:

mv YOUR_REPO_NAME/ storage/shared/

Now you can just open the directory from your Obsidian application and here we go, we have the vault up to date with the latest changes.

I also suggest putting inside your vault a .nomedia file so you won’t see the image contained in your vault in your gallery.

But how can make this process simpler?

Let’s first create a soft link to the repo to simplify the process:

ln -s storage/shared/YOUR_REPO_NAME YOUR_REPO_NAME

And then let’s create a pull.sh script that you will run to pull the latest changes from the repo:

cd YOUR_REPO_NAME/
git pull -r

and the push.sh script:

cd YOUR_REPO_NAME/
git add .
git commit -m "synched with android on $(date)"
git push

then let’s make them executable:

chmod +x push.sh pull.sh

From now on, you can push and pull executing those scripts with:

./pull.sh
./push.sh

Be aware that this solution doesn’t handle possible conflicts which I try to avoid as much as possible resetting my mobile vault considering the desktop one as the most up to date (having regular backups helps me to validate this assumption easily).

Of course, there is surely a window of improvement on this solution but I’m ok right now with this one, it’s easy to open termux, type ./pull.sh and then exit right after that I updated my vault.