ALL APPS
Sera teaches you space in short audio episodes, each under a minute. Every day it picks one for your sky tonight, then asks a quick question so it sticks. 48 episodes are free forever. Sera Pro adds new episodes, hands-on lessons, and offline listening.
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Screenshots
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Features
🎧
Daily Episode
One short audio episode each day, picked for what is in your sky tonight.
✅
Quick Recall
A short question after each episode, with your accuracy and a daily streak.
🌙
Moon Lab
A hands-on lesson: move the Moon and predict its phases.
🪐
3D Solar System
Rotate, zoom, and tap any planet for its facts and episodes.
🛰️
NASA, Made Short
Hubble images and NASA’s Astronomy Picture of the Day, explained in two or three plain sentences.
📅
Lunar Calendar
Tonight’s phase, the month ahead, upcoming eclipses, and a score for tonight’s viewing conditions.
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How it's built
- /Native SwiftUI for iPhone and iPad, with SceneKit for the 3D planets.
- /Python FastAPI backend on Render with Redis caching, serving NASA, Hubble, weather, moon-phase, and eclipse data.
- /Gemini rewrites NASA and Hubble captions into plain language.
- /Episodes are scripted, reviewed by a person, and voiced with ElevenLabs. Supabase stores and serves the catalog.
- /Paid content is locked on the server: Apple’s signed purchase proof is checked before any Pro audio is released, and it fails closed.
- /In testing: an AI pipeline on Google Cloud Run that researches, drafts, and fact-checks new episodes, with a human review gate before anything publishes.