A PostHog alternative that stays focused on iOS.

PostHog does nearly everything — analytics, replay, flags, experiments, surveys, SQL — and you can self-host it. Union does less, for one kind of app: an iOS app with subscriptions, where the App Store is half the story.

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Union and PostHog, side by side.

	Union	PostHog
Free tier	100,000 events a month	1M events, 5k replays, 1M flag requests a month
Session replay on iOS	No: No session replay	Yes: Recorded by the iOS SDK
Crash reporting	Yes: Built in, grouped into issues, named with dSYMs	Partly: Error tracking with dSYM upload; system frames not symbolicated
Subscription revenue	Yes: RevenueCat or App Store Server Notifications	Partly: Through RevenueCat’s PostHog integration
Self-hosting	No: Hosted only	Partly: MIT Docker deployment, officially unsupported

PostHog facts read on their own website on Oct 23, 2026. Rows we could not check there are left out rather than guessed.

Why teams pick Union over PostHog.

No assembly
Views that answer iOS questions directly, without dashboards, insights or SQL to set up.
The App Store built in
Downloads, conversion per market, proceeds, reviews and keyword positions from Apple.
Releases as a first-class thing
Adoption, crash-free rate, TestFlight and the before/after of each version on one page.

When PostHog is the better choice.

You want feature flags, experiments, surveys and replay in one tool.
You want to write SQL against your events.
You want to self-host, or need web and Android as well.

Questions about switching from PostHog.

Is Union open source?

The iOS SDK is on GitHub; the service is hosted only.

Other comparisons.

See who is using your app right now. Your first 100,000 events a month are free.

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