DienaDaily
A 'today in history' app for the chronically curious that uses the Wikipedia-events approach to give you a short, illustrated story of what happened on this date—and lets you build your own annotated timelines.
History-curious adults, students, and teachers who want bite-sized context for any date
- Daily 'On this day' feed: 5 notable events from the Wikipedia timeline on today's date, each in a 60-second read with images and a 1-sentence 'why it matters'
- Personal timeline builder: pin events, family milestones, or class topics to your own zoomable timeline and share it as a link
- Cross-era comparison: tap any date to see what else was happening across the world at the same moment
- Quiz mode: 'Which happened first, X or Y?' drawn from the timeline for classroom or personal trivia use
A Show HN project visualizing 4M Wikipedia events on a zoomable timeline hit 45 points and 22 comments, showing strong appetite for browsing history spatially rather than scrolling lists.
Established 'Today in History' app by Downshift LLC has 580K events, 4.5 stars and 6,400+ iOS reviews, with several rivals in stores — proving real but mature demand.Today In History — Mobile App ↗Today in History - App Store ↗
Core 'on this day' feature is crowded: a long-standing incumbent, multiple App Store competitors, and at least three open-source Wikipedia event APIs already exist, leaving limited room for a vanilla version.Today In History — Mobile App ↗Wikipedia, On this Day - API Documentation ↗GitHub - VaibhavRawat27/onthisday-api ↗
The leading app is free, and the audience skews casual/educational — no clear evidence of strong willingness to pay; timeline-building is a possible premium hook but unproven.Today In History — Mobile App ↗
Wikipedia-sourced historical facts are permanent, CC-licensed, and evergreen — content never goes stale and APIs have been stable for years.Wikipedia, On this Day - API Documentation ↗
Multiple free, well-documented APIs and open-source reference implementations (Sinatra/React, Node) make an MVP trivially buildable in days.GitHub - VaibhavRawat27/onthisday-api ↗GitHub - appsforbd/on-this-day ↗