# Habit Ledger > AI apps are built from more than models and interfaces. Their reminders, streak counters, default settings, personalization cues, upgrade prompts, and exit flows shape how people encounter and continue using a product. ## Entries - [Streak Counters in AI Learning Apps: What They Measure and What They Leave Out](https://habit-ledger-f3j.pages.dev/streak-counters-ai-learning-apps/): A streak counter records consecutive periods in which an app recognizes a qualifying user action. - [Default Settings as Decisions: A Guide to the First Five Screens of an AI Writing Tool](https://habit-ledger-f3j.pages.dev/default-settings-ai-writing-tools/): Default settings determine the initial state of an AI writing tool before a user makes an active selection. - [A Taxonomy of AI App Notification Copy: Reminder, Invitation, Nudge, and Guilt](https://habit-ledger-f3j.pages.dev/taxonomy-ai-notification-copy/): AI app notifications can be classified by the relationship they establish between a message and a requested action. - [How to Read Cancellation Flows in Subscription AI Apps: A Screen-by-Screen Method](https://habit-ledger-f3j.pages.dev/ai-subscription-cancellation-flows/): A cancellation flow is a sequence of screens that takes a subscriber from an active plan to a completed cancellation or another account state. - [Personalization Cues in AI Apps: What the Interface Signals and What It Reveals](https://habit-ledger-f3j.pages.dev/ai-app-personalization-cues/): Personalization cues are interface elements that suggest an AI app is adapting its content, recommendations, language, or interactions to an individual user. - [Follow Buttons and Paid Tiers on Character Platforms: A Guide to the Interface Mechanics](https://habit-ledger-f3j.pages.dev/character-platform-follow-buttons-paid-tiers/): Character platforms can combine follow controls, recurring content, interaction features, and paid subscription tiers within a single interface. ## About - [About Habit Ledger](https://habit-ledger-f3j.pages.dev/about/): what the site covers and how entries are made ## Optional - [RSS feed](https://habit-ledger-f3j.pages.dev/feed.xml)