Lineage is the oldest one (Divest and /e/ are forks of it). Calyx has a focus on security and privacy (comes with a free VPN with no signup requires). Currzntly Calyx is based on Android 13, even on the Fairphone 4 which doesn’t have it supportes. I son’t know enough about iodé to comment about it though.
deleted by creator
The Fairphone 2, 3/3+ and 4 can also run PostmarketOS (Linux) and Ubuntu touch IIRC
Edit: add Fp2 to list
If you were to pick the most mature one, which would you choose?
Lineage is the oldest one (Divest and /e/ are forks of it). Calyx has a focus on security and privacy (comes with a free VPN with no signup requires). Currzntly Calyx is based on Android 13, even on the Fairphone 4 which doesn’t have it supportes. I son’t know enough about iodé to comment about it though.