---
title: "Blog | Typ0genius"
description: "Blog posts, updates, and technical write-ups from Typ0genius."
canonical_url: "https://typ0genius.com/blog"
meta:
  "og:description": "Blog posts, updates, and technical write-ups from Typ0genius."
  "og:title": "Blog | Typ0genius"
---

> Index of every page on this site: [llms.txt](https://typ0genius.com/llms.txt)

**Typ0genius**

# **Blog**

Notes, updates, and technical write-ups.

Apr 25, 2026

## **A First Look at the Retention Messaging API**

Learn how Apple’s Retention Messaging API lets developers show custom messages, images, switch-plan suggestions, and promotional offers in the subscription cancellation flow.

```json
{"@context":"https://schema.org","@graph":[{"@id":"https://typ0genius.com/#website","@type":"WebSite","description":"Projects, blog posts, and technical notes by Florian.","name":"Typ0genius","url":"https://typ0genius.com/","publisher":{"@id":"https://typogenius.com/#organization"}},{"@id":"https://typ0genius.com/blog#webpage","@type":"WebPage","description":"Blog posts, updates, and technical write-ups from Typ0genius.","name":"Blog","url":"https://typ0genius.com/blog","isPartOf":{"@id":"https://typ0genius.com/#website"},"potentialAction":[{"@type":"ReadAction","target":["https://typ0genius.com/blog"]}]},{"@id":"https://typogenius.com/#person","@type":"Person","alternateName":"Typ0genius","name":"Florian","url":"https://typogenius.com","image":{"@id":"https://typ0genius.com/#/schema/image/1"},"sameAs":["https://www.threads.com/@typ0genius","https://bsky.app/profile/typ0genius.com","https://x.com/Typ0genius","https://mastodon.social/@Typ0genius"]},{"@id":"https://typogenius.com/#organization","@type":"Organization","logo":"https://typogenius.com/favicon.jpg","name":"Typ0genius","url":"https://typogenius.com","sameAs":["https://www.threads.com/@typ0genius","https://bsky.app/profile/typ0genius.com","https://x.com/Typ0genius","https://mastodon.social/@Typ0genius"]},{"@id":"https://typ0genius.com/#/schema/image/1","@type":"ImageObject","contentUrl":"https://typogenius.com/favicon.jpg","inLanguage":"en","url":"https://typogenius.com/favicon.jpg"}]}
```

## Sitemap

See the full [sitemap](https://typ0genius.com/sitemap.md) for all pages.