Progressive rewards infrastructure

Retention mechanics
your users actually feel.

StreakStack is a developer API for adding streaks, milestones, and climbing reward tiers to any app. Duolingo-grade engagement. Three lines of code.

app.js 
import { StreakStack } from 'streakstack';

const ss = new StreakStack('sk_live_...');

// User completes an action → streak increments
await ss.track('user_123', 'daily_login');

// Check their progression
const progress = await ss.getProgress('user_123');
// → { streak: 14, tier: "silver", reward_pct: 35 }
<3min
Integration time
17M+
DAU driven by streak mechanics (Duolingo)
$0
To start building

// primitives

Built around one insight:
users climb when they see progress.

🔥

Streaks

Track consecutive actions with configurable windows (daily, weekly, custom). Soft resets, grace periods, and freeze tokens built in. Users keep coming back to protect their streak.

🏆

Milestones

Define checkpoints that unlock rewards at any threshold. 10 logins, 50 purchases, 100 workouts. Each milestone triggers webhooks so your app reacts instantly.

📈

Progressive Tiers

Climbing reward percentages that increase with engagement. Start users at 1% and let them climb to 100%. The core mechanic that makes retention feel like a game.

📊

Retention Analytics

Real-time dashboards showing streak distribution, tier progression, and churn risk. Know which milestones drive the most retention and optimize your reward curves.

// progression

The climbing mechanic,
visualized.

1
Day 1
User signs up, earns base tier rewards
1% reward
7
Week 1
7-day streak unlocks Silver tier
15% reward
30
Month 1
Milestone hit, Gold tier activated
50% reward
★
Power User
Maximum tier, full reward share
100% reward

// the future

Retention shouldn't cost
enterprise money.

Every app with recurring users needs engagement mechanics. Streaks, milestones, climbing rewards. Today, only companies that can afford $10k/month platforms or build it themselves get access. StreakStack exists to change that. Progressive rewards infrastructure, open to everyone.