Journal

Notes from the ledger.

Occasional essays on App Analytics. They are not recaps of class. They are the arguments we were still having after the Saturday studio ended.

Person reviewing documents and a laptop at a desk

09 Apr 2026 · Celia Hartwell

Retention curves that flatter the product

How a generous window, a mixed cohort, and a quiet inclusion of staff accounts can make App Analytics look kinder than the week felt.

Open notebook with handwriting beside a coffee cup

18 Feb 2026 · Harun Adeyemi

Naming events like a cartographer

Place-names on a map are not poetry. They are agreements. The same is true of “checkout_started” and its cousins.

Someone working on a laptop in a bright room

03 Nov 2025 · Celia Hartwell

When DAU is a mood, not a measure

Daily active users can describe a weather system. They rarely describe whether anyone finished a job in the app.

Empty boardroom with a long table and city windows

21 Aug 2025 · Iona Breckenridge

The quiet cost of session replay

Watching users is easy to buy and hard to govern. A note on App Analytics adjacent tools that feel like research and behave like surveillance.