A simple digital knowledge base is likely a better fit than a dedicated “shoot planning” app.

From the suggestions here, two practical approaches are:

1. Use a blog: create a post for each shoot with your pre-shoot notes, then add setup photos, revised diagrams, and final images afterward. This gives you a chronological record, makes reflection easy, and can invite feedback from others.

2. Use a wiki: this is well suited to organizing reusable notes, diagrams, and shoot references. You can photograph hand-drawn sketches or create digital diagrams with drawing software, then attach or embed them alongside your notes and results. A wiki also makes it easy to link related shoots, lighting setups, and lessons learned.

If you want diagrams to be editable and reusable, creating simple lighting/posing components in illustration software and rearranging them for each shoot is a sensible approach.

So the core idea is: keep each shoot as a single digital record containing plan, setup, results, and reflections. A blog is better if you want a journal and public feedback; a wiki is better if you want structured, searchable, reusable documentation.