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5/10

CastTrail

An app that follows any actor's career as a living timeline and surfaces the forgotten gems between the hits — built for film lovers who want depth, not just top-10 lists.

Target user

film enthusiasts who binge one actor's filmography after seeing them in a trending project

Features
  • Interactive career graph with each role as a node rated by critics, audiences, and your taste
  • 'Hidden gem' mode that hides anything above a certain popularity threshold
  • 'Same year, same director' threads that surface collaborations you didn't know about
  • Personal ratings that feed a 'your taste overlaps with X director' report
Why now

The Emma Stone spike pairs with Guardian's deep dive into her filmography; film buffs want tools to explore an actor's body of work without manually cross-referencing Wikipedia.

Signals · overall 5/10
Demand
5/10

Letterboxd's 17M+ user base confirms a large film-enthusiast audience, but the specific actor-filmography timeline use case is supported only by a modest Google Trends spike (~200 searches for 'emma stone' CA) and a single small competitor (MovieCaster).Global number of Letterboxd subscribers 2024| StatistaMovieCaster on the App Store

Whitespace
3/10

Very crowded: IMDb dominates filmography data, Letterboxd owns film-buff social tracking, and MovieCaster on the App Store already offers 'tap on an actor to explore their biography, filmography, and career highlights'; even a YouTube tutorial exists for building such a React app.MovieCaster on the App StoreTimeline App, Visualizing the Movie Career of Any ActorIMDb: Ratings, Reviews, and Where to Watch the Best Movies & TV Shows

Monetization
5/10

Letterboxd Pro proves film buffs will pay for premium features at scale (17M users, paid tier), but a standalone actor-timeline app has weaker standalone willingness-to-pay than a full social/diary platform, and MovieCaster is free.Why Letterboxd Became the Platform for Online Film Buffs - VarietyGlobal number of Letterboxd subscribers 2024| Statista

Longevity
6/10

Film catalogues and actor careers are evergreen, and film-buff behavior is durable (Letterboxd grew 1.8M→17M in four years), though individual-actor demand spikes tied to releases are short-lived.Why Letterboxd Became the Platform for Online Film Buffs - Variety

Feasibility
8/10

Straightforward to build: TMDB API plus Wikipedia provide full filmography data, and the existence of a YouTube React tutorial for an actor-career timeline app confirms the technical scope is modest; Letterboxd and MovieCaster also prove the data pipelines work.Timeline App, Visualizing the Movie Career of Any ActorMovieCaster on the App Store

emma stone · 200+ searches · CAGoogle Trends · 2026-07-04 (21d ago)
CastTrail — TrendWatcher