Keep time straight.
Lay out what happens in story order, separate from the order you tell it, in lanes by plotline.

What you can do
Story order in lanes
Columns in story order, rows per plotline, holding events and dated scenes. Click a scene to open it.
Timeline events
Title, free-text date (Spring 1923, day 3, dawn), order, plotline, description, the scenes it's told in and who and where it involves.
Told vs happened
A chart linking reading order to story order for every dated scene, with flashbacks highlighted and counted.
Quick-date scenes
A table of undated scenes with inline date and order fields, order suggested for you.
Agents keep it honest
Continuity checks scenes against the timeline; roles you allow can add and date events.
Questions
Is timeline included on the Free plan?
Yes, on every plan, Free included. Compare plans.
Works with
Codex (story bible)Characters, places, items, factions, lore, concepts and events, each with a profile, fields, aliases and relationships.Outline: corkboard, plot grid and listThree views of the same structure.Relationship graphThe graph draws your codex as a living map: characters, places and things joined by the relationships you've set, by mentions and by how often they share a scene, with chapters and notes alongside..