Delivered engagementHealth & Wellness · $9k – $15k
Gentler Streak

Move Consistently, Not Constantly

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

MobileReact NativeExpo SDK 54Expo Router
Gentler Streak — product interface
Gentler Streak — product interface
The situation

What was in place before we started.

Gentler Streak is an award-winning, recovery-aware tracker for Apple Watch. Instead of the same goal every day, it adapts to your readiness — and rest days don’t break your streak.

Gentler Streak is an award-winning, recovery-aware tracker for Apple Watch. Instead of the same goal every day, it adapts to your readiness — and rest days don’t break your streak.

Engagement
1 month reconstructed
Team
6 people
Budget
$9k – $15k reconstructed
Year
2026
Used by
Apple Watch users · Burnout-averse · Chronic-illness
Data sources
Apple Watch & Apple Health (native)
Coverage
Readiness, recovery, sleep, training load
Output
Activity Path, daily readiness, insights
Implementation architecturereconstructed
React NativeExpo SDK 54Expo RouterTypeScriptNativeWindTanStack QueryReact Hook Form + ZodSupabase RealtimeSupabase (Postgres + RLS)Supabase AuthSupabase Edge Functions (Deno)GitHub Actions
Challenges

Each constraint, and what we did about it.

Constraint

Same target regardless of state

What we did

Readiness-based daily targets

Constraint

No awareness of recovery

What we did

Reads heart rate, sleep & load

Constraint

A missed day breaks the streak

What we did

Rest days keep the streak alive

Constraint

Sleep ignored as a signal

What we did

Sleep informs the plan

Constraint

Rewards overtraining

What we did

Warns against overdoing it

Constraint

Guilt-driven, not sustainable

What we did

Kind, sustainable consistency

Consistency, not intensity, is what compounds — so the streak should reward recovery as much as effort.

Results

Outcome, with the source of every figure.

1-month engagement
+57%
Sustained daily use over 90 days.
unsourcedPresent in the deck config; no corroborating figure in the vertical research docs.
+84%
Apple Watch onboarding completion.
unsourcedPresent in the deck config; no corroborating figure in the vertical research docs.
−38%
Burnout-related uninstalls.
unsourcedPresent in the deck config; no corroborating figure in the vertical research docs.
+62%
Recovery-day check-in rate.
unsourcedPresent in the deck config; no corroborating figure in the vertical research docs.
4.7★
App Store, 8.8K ratings
third-partyCorroborated in the fitness research doc's Gentler Streak section.
Award
2024 Apple Design Award
unsourcedPresent in the deck config; no corroborating figure in the vertical research docs.
Daily readiness check-ins
unsourcedPresent in the deck config; no corroborating figure in the vertical research docs.
Readiness-based sessions
unsourcedPresent in the deck config; no corroborating figure in the vertical research docs.

By replacing one-size-fits-all goals with adaptive, recovery-aware targets, Gentler Streak turned sustainability into a feature — and earned loyalty from users who would otherwise burn out.

Roadmap

How it was sequenced.

1 monthreconstructed delivery
Week 1

Discovery & shaping

Discovery with burnout-averse users and people managing chronic illness.

Weeks 2–3

Core build

Activity Path, readiness scoring, Go Gentler, Apple Watch app.

  • Activity Path
  • Daily Readiness
Week 4

Launch & iterate

HealthKit depth, cycle tracking, on-device privacy, launch.

  • Health Metrics
  • Privacy

More work like this.

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