Delivered engagementHealth & Wellness · $9k – $15k
Peaks

Circadian Productivity

Delivered engagement. Coralsoft designed and built this product end to end; figures below retain their evidence level.

MobileReact NativeExpo SDK 54Expo Router
Peaks — product interface
Peaks — product interface
The situation

What was in place before we started.

Peaks transforms sleep data into an energy forecast. It predicts when you peak, dip, and recover — and turns that into a planned day of focus, exercise, and rest.

Peaks transforms sleep data into an energy forecast. It predicts when you peak, dip, and recover — and turns that into a planned day of focus, exercise, and rest.

Engagement
2 months reconstructed
Team
6 people
Budget
$9k – $15k reconstructed
Used by
Knowledge workers · Entrepreneurs · Athletes · Students
Data sources
Apple Health, iPhone, Apple Watch
Coverage
Sleep, circadian rhythm, energy forecasting
Output
Daily timeline, focus windows, recovery
Implementation architecturereconstructed
React NativeExpo SDK 54Expo RouterTypeScriptNativeWindTanStack QueryReact Hook Form + ZodVercel AI SDKSupabase (Postgres + RLS)Supabase AuthSupabase Edge Functions (Deno)OpenAI GPT-4o
Challenges

Each constraint, and what we did about it.

Constraint

Calendars treat every hour the same

What we did

Schedule aligned to your chronotype

Constraint

Sleep tracked but never acted on

What we did

Sleep data drives tomorrow's plan

Constraint

Energy crashes ignored, pushed through

What we did

Energy windows blocked as time

Constraint

No recovery windows in the day

What we did

Recovery scheduled, not skipped

Constraint

Generic time-management advice

What we did

Continuous personal biological model

Constraint

Nothing predictive — only retrospective

What we did

Tomorrow forecast — today

Productivity comes from working with your rhythm — not against it. Sleep is the input. The plan is the output.

Results

Outcome, with the source of every figure.

2-month engagement
+64%
Daily plan adherence.
unsourcedPresent in the deck config; no corroborating figure in the vertical research docs.
+52%
Active morning sessions.
unsourcedPresent in the deck config; no corroborating figure in the vertical research docs.
−41%
Time spent on the wrong task.
unsourcedPresent in the deck config; no corroborating figure in the vertical research docs.
+47%
Weekly retention lift.
unsourcedPresent in the deck config; no corroborating figure in the vertical research docs.
4.9★
App Store rating
unsourcedPresent in the deck config; no corroborating figure in the vertical research docs.
73%
Pro conversion
unsourcedPresent in the deck config; no corroborating figure in the vertical research docs.
Daily timeline opens
unsourcedPresent in the deck config; no corroborating figure in the vertical research docs.
Sleep model confidence
unsourcedPresent in the deck config; no corroborating figure in the vertical research docs.

By transforming passive sleep tracking into an active daily plan, Peaks turned circadian science into practical productivity — and gave busy users a calmer, more aligned day.

Showcase

The screens that carry it.

4 of 4 screens
Peaks — product screenshot
Peaks — product screenshot
Peaks — product screenshot
Peaks — product screenshot
Roadmap

How it was sequenced.

2 monthsreconstructed delivery
Weeks 1–2

Discovery & shaping

Discovery, circadian science partnership, target-user research, scoping.

  • Circadian Modeling
Weeks 3–7

Core build

Sleep ingest, forecasting engine, daily timeline UX, premium tier.

  • Forecasting
  • Daily Timeline
Weeks 8–9

Launch & iterate

Apple Watch integration, App Store launch, retention & refinement.

  • Passive Operation

More work like this.

Every case study is a Coralsoft delivery story, with the evidence behind each figure kept visible.