# OnThisAyer > Daily historical discovery platform and marketing showcase for Ayer App by Chapiware. OnThisAyer (https://xatpy.github.io/OnThisAyer/) is an interactive web platform that showcases curated historical events ("On This Day") across technology, cinema, pop culture, science, and history for every day of the year. It powers discovery for **Ayer App** (https://www.chapiware.com/ayer/), an on-device, 100% private photo memories application available for **iOS (iPhone/iPad)** and **Android**. ## About Ayer App - **Developer:** Chapiware Studio (https://www.chapiware.com) - **Platforms:** iOS (App Store) & Android (Google Play) - **Core Value Proposition:** Ayer automatically organizes your photo gallery by date across all years, allowing you to relive what you were doing on this exact day 1, 5, 10, or 15 years ago. - **Privacy Model:** 100% private, on-device processing. No cloud uploads, no server analytics, no user tracking, and no account required. Works completely offline. ## Key Features of OnThisAyer Web - **Daily Time Machine:** Browse what happened on today's date across history with curated Wikipedia imagery and clean event descriptions. - **Interactive iOS Preview:** Live phone mockup demonstrating how photo memories feel inside the Ayer mobile interface. - **Future Date Locking:** Anti-spoiler lock mechanism preventing access to future dates until they arrive. - **Social Sharing:** One-click copy tools for Twitter/X and structured, nostalgic Instagram/Threads captions. - **Free & Open Data:** Powered by the open Wikimedia Foundation REST APIs with zero advertising. ## Links & References - [Ayer App Official Website](https://www.chapiware.com/ayer/) - [Ayer Privacy Policy](https://www.chapiware.com/ayer/privacy) - [Chapiware Studio](https://www.chapiware.com) - [OnThisAyer GitHub Repository](https://github.com/Xatpy/OnThisAyer) - [Full LLM Documentation](https://xatpy.github.io/OnThisAyer/llms-full.txt)