Alumni letters

Not a wall of five stars.

These are edited for length, not for mood. Where someone found the room awkward, that sentence stayed in.

“I came for dashboard hygiene and left with a tracking plan my engineer would actually open. The property discipline module on Signal Architecture is dry in the best way: you cannot hide behind a pretty funnel.”

Hannah Okonkwo, staff product manager, Leeds
Portrait of Tomáš B.

Tomáš sat Retention Cartography from Prague and sent this after week three:

“The resurrection lecture made me retire a vanity reactivation campaign we had been congratulating ourselves for. I still think the homework load is heavier than the page admits, and I missed one live room because of a release. The recording was enough to catch the method, not the argument in the room.”

Tomáš B., Prague

Rated 8 / 10 · alumni board · June 2025

“Clear on identity, slightly precious about slide design. Would enrol a colleague in Attribution without Theatre, not in the same month as Signal Architecture — it is a lot of renaming at once.”

“A client in travel booking. Session Reconstruction taught our support lead to stop treating a rage-tap as a feature request. We did not love the evening start time.”

Saira, Bristol: “Experiment Readouts is the first time anyone told me a non-significant test can still be a decision. Short course. I wanted one more week on sequential testing, and they said no, which I respect.”

Team around a table reviewing documents

Case note · grocery

A Manchester grocery app and a funnel that was two events too proud

Priya’s team arrived with a five-step checkout funnel that “converted” at 11%. After Signal Architecture they collapsed two duplicate add-to-basket events and moved a guest-checkout property onto the order object. The reported conversion dropped to 7%, which finance disliked for a week, and then the weekly ops meeting stopped arguing about a number that had never existed.

They did not hire us afterwards. They kept the limitation appendix. That is a successful room.

Case note · audio

A subscription player that counted every lock-screen tap as love

Julian’s Retention Cartography room took a UK audio app whose D7 looked heroic until play events from Bluetooth devices were unbundled from intentional opens. The cohort window moved from calendar D7 to “seventh active day with a completed track.” Growth’s slide got worse. Editorial’s commissioning calendar got honest.

The founder still writes once a quarter. The tone is dry, which we prefer.

Colleagues talking in a softly lit office