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Apps for small habits that last

Tools that help you grow, one habit at a time.

Defyner builds thoughtful mobile apps for productivity, habit-building and self-improvement. Small changes, tracked simply.

BookTrail on iPhone: organize your personal bookshelf and track reading progress
BookTrail app icon

Our first app

BookTrail keeps every book in one place.

Track your collection and reading progress across paper books, e-books and audiobooks.

  • Track your book collection and reading progress from one dashboard.
  • Keep physical books, e-books, and audio books organized together.
  • Update the titles you're currently reading with fresh progress snapshots.
See BookTrail