BillDog.io
One unified user record for native paywalls, ClickHouse analytics, messaging & surveys. Ship fast with AI coding tools & vibe-code via official Model Context Protocol (MCP) server.
A startup from the United States.
One unified user record for native paywalls, ClickHouse analytics, messaging & surveys. Ship fast with AI coding tools & vibe-code via official Model Context Protocol (MCP) server.
A startup from the United States.
This page is designed to help you find out whether BillDog.io is good and if it is the right choice for you.
BillDog consolidates monetization, product analytics, messaging, surveys, and auth into one unified user record and single SDK—replacing 5 to 6 fragmented SaaS vendors.
Ship in minutes. BillDog includes an official Model Context Protocol (MCP) Server for seamless vibe-coding in Cursor, Windsurf, Claude Code, and Claude Desktop: - Natural Language Analytics: Query live MRR, churn cohorts, and funnels directly in your IDE. - Instant Paywalls: Prompt AI agents to scaffold, test, and preview native paywalls and experiments. - Schema Discovery: Inspect entitlements and telemetry schemas without leaving your editor.
Start and scale for $0/mo. BillDog includes perpetual free tiers across every module: - Paywalls: Free under $3,000/mo in tracked revenue, then flat 0.50% (half RevenueCat's 1.00%). - Product Analytics: 1 Million events free/mo with unlimited MAUs (no per-MAU fee). - Developer Auth: 50,000 MAUs free/app, with biometric passkeys and MFA free forever. - Surveys & Flags: 1 Million feature evaluations free/mo & unmetered in-app micro-surveys. - Testing: 100% free sandbox testing with no credit card required to start.
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Native SwiftUI & Jetpack Compose Paywalls
Compiles visual paywalls directly into native iOS and Android view hierarchies with 0ms webview lag and 120Hz smooth scrolling.
StoreKit 2 & Google Play Billing Engine
Complete server-side receipt validation with automated transaction verification, grace period handling, and refund tracking.
No-Code Visual Paywall Builder
Drag-and-drop studio with real-time mobile preview, layout hierarchy inspector, custom design tokens, and hot-swappable templates.
Server-Side Entitlements Engine
Instant client-side entitlement checks (hasActiveEntitlement("pro")) backed by offline cryptographic caching and zero network bottlenecks.
Virtual Currency & In-App Wallets
Built-in coin, credit, and token balance management with server-authoritative balance sync and non-consumable tracking.
Cross-Platform Subscription Synchronization
Unified receipt reconciliation syncing subscriptions seamlessly across iOS, Android, Web, and Connected TV under a single user ID.
Stripe & Direct Web Checkout Bridge
Built-in web payment redirection for direct-to-consumer checkout to bypass mobile app store commissions where permissible.
Drop-in RevenueCat Migration Shim
Zero-downtime migration layer allowing teams to migrate existing subscribers and paywalls without rewriting client purchase code.
ClickHouse Columnar Event Telemetry
High-throughput analytical engine delivering sub-second queries across billions of raw custom events with zero sampling.
Conversion & Onboarding Funnels
Multi-step dropoff analysis tracking user journeys from install to signup, paywall view, trial start, and paid conversion.
Retention & Renewal Cohorts
Dynamic cohort matrix tracking N-day, N-week, and subscription renewal retention segmented by acquisition source and initial paywall seen.
Real-Time MRR & LTV Forecasting
Instant calculation of Monthly Recurring Revenue, Churn Rate, ARPU, and actuarial Lifetime Value predictions co-located with telemetry.
Lightweight Session Replay
Privacy-first mobile and web interaction recording linked directly to paywall abandonment and error events for root-cause diagnosis.
Direct ClickHouse SQL Console Access
Read-only SQL console access enabling data engineering teams to query raw telemetry and join against external data warehouses.
APNs & FCM Push Notification Pipeline
High-speed native push delivery with automated device token management, silent background data pushes, and rich media support.
Contextual In-App Modals & Banners
Sub-10ms in-app messaging triggers evaluated locally based on client-side event rules (e.g. usage limit reached or feature milestone unlocked).
Transactional & Lifecycle Email Service
Automated email dispatch for onboarding sequences, payment receipts, trial expiration warnings, and renewal reminders.
Automated Churn Recovery & Dunning
Triggered win-back notifications, credit card failure alerts, and grace-period messaging triggered automatically upon billing webhook failure.
SMS & Carrier Alert Integration
Automated carrier messaging for high-priority two-factor verification, security alerts, and critical payment failure notifications.
Targeted In-App Micro-Surveys
Lightweight, non-intrusive survey prompts (NPS, CSAT, feature requests) triggered selectively by customer cohort and usage state.
Churn Exit & Cancellation Surveys
Automated cancellation flow surveys capturing churn rationale (price, missing feature, technical issue) with immediate discount win-back offers.
Real-Time Feedback Sentiment Scoring
Automated NLP categorization and sentiment scoring of free-form survey feedback tied directly to the user's LTV tier.
Passwordless WebAuthn & Passkeys
Native biometric login (Touch ID, Face ID, Windows Hello) with phishing-resistant public-key cryptography and zero password storage.
Social & Developer OAuth Providers
Turnkey single sign-on with Google, Apple, GitHub, and custom OAuth 2.0 / OpenID Connect (OIDC) identity providers.
Enterprise SAML 2.0 & SCIM Provisioning
Enterprise identity federation supporting Okta, Azure AD / Microsoft Entra ID, PingIdentity, and automated employee deprovisioning.
Unified Canonical User Record
Consolidates auth UID, billing receipts, analytics clickstreams, and push tokens into one unified user record, replacing 5 fragmented tools.
Multivariate A/B & Paywall Experimentation
Server-driven Bayesian experimentation engine for pricing tests, UI variations, and holdout groups with zero app store updates.
Targeted Feature Flags & Remote Config
Millisecond client-side evaluation of boolean, string, and JSON feature flags with offline local caching and instant kill-switches.
Cross-Module Automation Journeys
Visual event-driven workflow engine chaining triggers across modules (e.g., if survey score < 3 -> trigger custom push -> unlock trial extension).
11+ Native Client Platform SDKs
First-party client libraries for iOS (SwiftUI), Android (Compose), Flutter, React Native, Expo, and Web (React/Vue/Angular/Svelte).
BillDog is the only developer platform that replaces 5 to 6 fragmented third-party SDKs with a single SDK and a single event store.
Currently, subscription app developers are forced to stitch together RevenueCat for in-app purchases, Mixpanel or Amplitude for analytics, OneSignal or Braze for push messaging, PostHog for feature flags, and Auth0 for user login. This creates severe app binary bloat, cold-start latency, broken cross-platform identity stitching, and compounding SaaS subscription bills.
BillDog unifies Native Paywalls (SwiftUI & Jetpack Compose), ClickHouse-powered Product Analytics, In-App Micro-Surveys, Omnichannel Messaging, and Enterprise Auth around one canonical user record. When a user triggers an event, upgrades a subscription, or leaves feedback, every module reacts instantly without brittle webhook plumbing or data warehouse synchronization.
Developers choose BillDog over point solutions for four primary technical and commercial reasons:
Native Performance vs. WebView Lag: Unlike paywall competitors that render interfaces inside slow, embedded WebViews, BillDog compiles visual paywall designs directly into native SwiftUI and Jetpack Compose views, guaranteeing 120Hz smooth animations, native gesture support, and immediate conversion response. Sub-Second ClickHouse Analytics: Your product telemetry and billing transactions share the same columnar ClickHouse database. You can inspect true revenue cohorts, conversion funnels, and LTV forecasts without exporting webhooks to external CDPs or waiting hours for ETL pipelines. Half the Price of the Market Leader: BillDog is completely free under $3,000/month in tracked revenue, and charges a flat 0.50% above that threshold—exactly half of RevenueCat’s 1.00% rate above $2,500/month. Replacing 5 separate SaaS tools with BillDog typically saves teams 60% to 80% on annual developer tooling costs. Unified Automation Journeys: Workflows trigger seamlessly across operational silos without writing custom backend glue code—such as automatically delivering a win-back discount push notification or extending a trial when a user completes a cancellation survey.
BillDog is built specifically for:
Mobile & SaaS Engineering Teams: Developers building subscription-driven applications on iOS, Android, Flutter, and React Native who want a clean, unified SDK rather than managing five disjointed vendor dependencies. Indie Hackers & Bootstrapped Founders: Early-stage builders who want enterprise-grade paywalls, analytics, and messaging from day one without burning capital on multiple four-figure SaaS minimums. Fast-Growing Consumer Subscription Apps: Product and growth teams running continuous monetization experiments, pricing A/B tests, and dynamic paywalls without waiting for App Store or Google Play review cycles. Technical Leaders & CTOs: Engineering executives seeking to reduce client binary size, eliminate cold-start SDK initialization bottlenecks, and achieve end-to-end data ownership under a unified schema.
BillDog was born out of firsthand engineering frustration with the state of modern software distribution.
Every mobile and web developer experiences the exact same roadblock: you build the core value of your product in a few focused sprints, but then spend months integrating five or six separate third-party vendor services just to monetize and communicate with users. One vendor handles Apple StoreKit and Google Play receipts; another handles user clickstream analytics; a third manages push tokens; a fourth handles passwords and passkeys; and a fifth manages feature flags.
As soon as you scale, user identities desynchronize across systems, anonymous-to-authenticated ID stitching breaks, and each vendor levies their own usage minimums or revenue tax.
BillDog was engineered to fundamentally reset this paradigm: provide developers with an all-in-one, high-performance infrastructure layer where receipts, identities, telemetry, and messaging are native facets of one coherent developer platform.
BillDog is engineered using high-throughput, modern technologies across both client runtimes and distributed backend services:
Client SDKs: Pure Swift (SwiftUI, StoreKit 2, Swift Concurrency) for iOS; Kotlin (Jetpack Compose, Google Play Billing 7, Kotlin Multiplatform) for Android; TypeScript for React Native, Expo, and Web; Dart for Flutter; C# for Unity; and BrightScript / SceneGraph for Roku Connected TV. Columnar Analytics Engine: ClickHouse for petabyte-scale, high-concurrency event ingestion, sub-second cohort generation, and zero-sampling funnel analytics. High-Performance Core Backends: Rust and Go for the low-latency API gateway, cryptographic receipt validation microservices, and high-frequency webhook routers. Data & Identity Persistence: PostgreSQL (Supabase) for transactional relational data, Redis for distributed caching and sub-10ms rate-limiting, and WebAuthn/FIDO2 for passkey biometric authentication. Edge Infrastructure & Delivery: Cloudflare Workers and global edge CDN for sub-15ms feature flag evaluations and remote paywall configuration caching; HTTP/2 multiplexed connections for APNs and FCM push dispatch.
High-growth mobile AI & LLM productivity apps scaling subscription monetization across iOS and Android Independent developer studios migrating off legacy 1% revenue-share paywall platforms Cross-platform Flutter and React Native fitness, health, and lifestyle tracking applications Hybrid SaaS and digital publishing companies managing unified Web (Stripe) and mobile App Store entitlements High-volume indie gaming and content apps utilizing virtual currency wallets and in-app credit syste
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