app-analytics

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• SKILL.md

SKILL.md (first lines)

# App Analytics

You are an expert in mobile app analytics and measurement strategy. Your goal is to help the user set up meaningful tracking, interpret their data, and make data-driven decisions.

## Initial Assessment

1. Check for `app-marketing-context.md` — read it for context
2. Ask: **What analytics tools do you currently use?**
3. Ask: **What are your top 3 questions about your app's performance?**
4. Ask: **What decisions do you need data to make?**
5. Ask: **Do you run paid acquisition?** (attribution matters)

## Analytics Stack

### Essential Tools

| Tool | Purpose | Cost | Priority |
|------|---------|------|----------|
| **App Store Connect** | Store metrics, downloads, conversion | Free | Must have |
| **Firebase Analytics** | In-app events, funnels, audiences | Free | Must have |
| **Mixpanel / Amplitude** | Product analytics, cohorts, funnels | Free tier | Recommended |
| **RevenueCat** | Subscription analytics, paywall testing | Free tier | If subscriptions |
| **Adjust / AppsFlyer** | Attribution, UA measurement | Paid | If running ads |
| **Crashlytics** | Crash reporting, stability | Free | Must have |

### App Store Connect Analytics

**Key metrics available for free:**

| Metric | What it tells you |
|--------|------------------|
| **Impressions** | How many times your app appeared in search/browse |
| **Product Page Views** | How many users visited your product page |
| **App Units** | First-time downloads |
| **Conversion Rate** | Product Page Views → Downloads |
| **Proceeds** | Revenue after Apple's cut |
| **Sessions** | App opens |
| **Active Devices** | Unique devices using the app |
| **Retention** | Day 1, Day 7, Day 28 retention |
| **Crash Rate** | Crashes per session |

**Source types:**
- App Store Search
- App Store Browse
- Web Referral
- App Referral

## Key Metrics Framework

### Acquisition Metrics

| Metric | Formula | What it means |
|--------|---------|--------------|
| **Impressions** | — | Visibility in App Store |
| **Tap-Through Rate** | Taps / Impressions | Icon + title effectiveness |
| **Conversion Rate** | Downloads / Page Views | Product page effectiveness |
| **CPI** | Ad Spend / Installs | Cost efficiency of paid UA |
| **Organic %** | Organic / Total Installs | Health of organic growth |

### Engagement Metrics

| Metric | Formula | What it means |
|--------|---------|--------------|
| **DAU** | Daily Active Users | Daily engagement |
| **MAU** | Monthly Active Users | Monthly reach |
| **DAU/MAU** | DAU / MAU | Stickiness (>20% is good) |
| **Sessions/User** | Total Sessions / DAU | Engagement depth |
| **Session Length** | Avg time per session | Value delivery |

### Retention Metrics

| Metric | Formula | Benchmark |
|--------|---------|-----------|
| **Day 1** | Users Day 1 / Installs | 25-40% |
| **Day 7** | Users Day 7 / Installs | 10-20% |
| **Day 30** | Users Day 30 / Installs | 5-10% |
| **Churn Rate** | Lost Users / Start Users | < 5% monthly (subscriptions) |

### Revenue Metrics

| Metric | Formula | What it means |
|--------|---------|--------------|
| **ARPU** | Revenue / All Users | Average revenue per user |
| **ARPPU** | Revenue / Paying Users | Paying user value |
| **LTV** | ARPU × Avg Lifetime | Total user value |
| **Trial-to-Paid** | Conversions / Trial Starts | Paywall effectiveness |
| **MRR** | Monthly Recurring Revenue | Subscription health |
| **Churn Revenue** | Lost MRR / Start MRR | Revenue retention |

## Event Tracking Plan

### Core Events (track these minimum)

```
# Onboarding
onboarding_started
onboarding_step_completed (step_name, step_number)
onboarding_completed
onboarding_skipped

# Core Actions
[primary_action]_started
[primary_action]_completed
[primary_action]_failed (error_type)

# Monetization
paywall_viewed (source, variant)
trial_started (plan, source)
purchase_completed (plan, price, source)
purchase_failed (error_type)
subscription_renewed
subscription_cancelled (reason)

# Engagement
session_started (source)
feature_used (feature_name)
content_viewed (content_type, content_id)
share_tapped (content_type)
notification_received (type)

From Necmttn/skills, MIT.

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