Sidera turns transits into a planner. The calendar scores each day against your natal chart and shades it from peak to low, switchable between weekly and monthly views and between a work, love or health focus. Opening a day shows its score and reading, and a Decode My Day action hands that date and the relevant chart details to the built-in AI without you re-explaining anything. The site states it reads over 200 planetary aspects against the full chart each day rather than a sun-sign forecast.
The Life cycles view zooms out to a personal transit timeline across months and years. A gray background carries overall intensity while arrows separate supportive from challenging aspects, so strength and meaning stay distinct, and Moon and eclipse events sit alongside. Tapping a transit decodes it against the other influences active at the time, or asks when the same aspect last occurred.
Find best date works the other way round: pick an activity, set a 7, 30 or 90 day window, and compare the dates by rating with lunar phases and timing notes beside each one. The calendar can run on Western tropical or Jyotish Lahiri sidereal timing alongside cultural and religious calendars, and the saved natal chart system is a separate setting. Compatibility reads two charts together across emotional closeness, common ground, understanding and resilience, and the AI chat continues with either side in context, by text or voice.
Everything runs in the browser at app.sideraai.com, with an Android build on Google Play. Onboarding asks for a birth date and birthplace in two steps and then requires an account before any result appears, so the free tier is free but not anonymous. The free tier covers the daily reading, the natal chart and core insights; Pro costs $9.99 a month or $49.99 a year and adds past and future day viewing, deeper AI readings, unlimited conversations and the complete Find best date feature.
A public daily horoscope section needs no account and is specific enough to check: an entry names the Moon sign, the solar house it moves through, its aspect to the sign, and void-of-course periods with the exact ingress time in UTC. A short morning email is offered separately through Substack.
The interface is available in English, Spanish, Brazilian Portuguese, French, German and Russian. The terms are governed by Wyoming law, set an 18 or over age limit, and state that all content is AI-generated and metaphorical rather than predictive. The privacy policy says inputs may be used to improve the AI models depending on your settings and applicable law, with an opt-out where the law requires one.
