---
title: "Sleep calculator — design for the Sleep Expert sleep-tracking app"
client: "Sleep calculator"
publishedAt: "2024-04-18"
updatedAt: "2026-08-26"
canonical: "https://en.prostor-agency.com/cases/sleep-calculator"
tags:
  - "interfaces"
  - "research"
summary: "A sleep-tracking app: 60+ designed screens and 23+ online meetings with the client across the project."
metrics:
  - label: "screens"
    value: "60+"
  - label: "client meetings"
    value: "23+"
---

## The task

Solve the problem of a user who wants to control their sleep, get statistics and useful advice — without having to learn a complicated interface to do it.

## The approach

We designed the Sleep Expert app around the simplest possible user journey: task analysis, a prototype, the user flow, a design concept, and a separate research stage with interviews — run after the concept was already in place, to check and refine details before the final revisions. By the team's own account, work on the user flow took the most time of any stage.

## What we did

**Sleep tracking.** A screen with sleep phases (deep, light, REM), a soft-phase alarm, and sounds for falling asleep.

**Journal.** Night-by-night graphs, snore and sleep-talk recording, a day-by-day breakdown.

**Personal recommendations.** Sleep-improvement advice based on the collected data.

## The result

- 60+ designed screens, from onboarding to the journal and statistics
- 23+ online meetings with the client across the project
- at the time the case was published, the app was preparing to launch on the App Store and Google Play