First Hundred is an iPhone app designed to assist users in establishing their first habit. The app's primary focus is on guiding individuals through a 100-day journey of building a single habit, enabling them to concentrate on their objectives. Created with the intention of aiding users in initiating their self-improvement voyage, First Hundred is stripped of unnecessary features, offering a straightforward approach to daily habit formation.

The core features of First Hundred are provided free of charge, emphasizing simplicity and effectiveness. Users can benefit from visual animations illustrating daily progress, a day tracker to monitor habit completion, customizable notifications to stay on track, ambient soundtracks for reflection after completing tasks, and a collection of 100 unique animations for each day of the habit-building journey.