Everything here assumes you want the real answer rather than a reassuring one. Enter the birth data accurately, pick a house system on purpose, and the rest of the app follows from those two choices.
The Ascendant moves roughly one degree every four minutes, so a ten-minute error shifts it by about two and a half degrees. That is usually harmless. An hour of error can move the Ascendant a whole sign and shift most house cusps with it, which changes a large part of the reading. If your certificate gives a time to the minute, use it exactly as written - do not round it.
Do I need to adjust for daylight saving or a wartime clock myself?
No, and you should not try. Ascendia resolves the time zone that was legally in force at that place on that date, including wartime rules and the years when a country sat on a permanent offset. Adjusting the time by hand before entering it is the single most common way people end up with a chart that is an hour out. Enter the clock time that was written down.
Which house system should I choose?
If you have no reason to prefer one, start with Placidus, which is what most modern Western material assumes, or Whole Sign, which is what most traditional material assumes. The honest answer is that astrologers disagree, and the app lets you switch so you can see the disagreement rather than read about it. Watch which planets change house when you switch - those are the placements any interpretation should treat carefully.
Why do some house systems break down for a birth at a high latitude?
Placidus and Koch divide time rather than space, and above roughly 66 degrees the Sun may not cross the horizon at all on the day in question, so the division has nothing to work with. Houses come out wildly unequal or undefined. For births far north or south, Whole Sign, Equal and Porphyry stay well behaved, which is the practical reason to keep them available.
What is an orb, and why are there three settings?
An orb is how far from exact an aspect is allowed to be and still count. A square that is one degree from exact is doing something obvious; the same square nine degrees out is arguable. Tight, standard and wide let you decide how much argument you want on the screen. Beginners usually find tight easier to read, because a chart drawn wide can put a line between nearly everything.
A transit is listed as applying. What does that mean?
Applying means the orb is still closing and the aspect has not gone exact yet. Separating means it already peaked and is fading. The distinction matters because the same aspect reads differently on the way in and on the way out, and because the exact date is the one worth putting in a calendar.
What does void-of-course actually mean?
It is the stretch between the Moon making its last major aspect in a sign and entering the next sign. The traditional reading is that things started in that window tend not to develop as expected. Whether you act on that is your call; the app shows the window and the exact times so you can at least notice it rather than discover it afterwards.
I do not know my birth time at all. Is the chart useless?
Not useless, but incomplete. Planets by sign are fine, since most move slowly. Everything that depends on the exact moment - the Ascendant, the Midheaven, the house placements and the Moon to the degree - is not. Use the rectification tool: enter events you can date, test candidate times, and watch which ones put the angles where your own history says they should be.
How does the day-book comparison work?
You log mood and energy briefly each day. After about a fortnight there is enough of a record to line your own entries up against the transits that were actually running, and the app reports what correlates. It is a description of your data, not a claim about anyone else, and it never leaves the device.
Do my birth details get uploaded anywhere?
No. The ephemeris and the place database ship inside the app, so the chart is computed locally. Switch the device to Airplane Mode and cast a chart - if it works offline, nothing was sent. Day-book entries stay local as well.
What do the astrocartography lines mean on the map?
Each line marks where a planet would have been on one of the four angles at the moment you were born. A Venus line on the Ascendant runs through the places where Venus was rising. Astrologers read those as locations where that planet is more present in how life goes. Treat it as a prompt for reflection rather than a relocation plan.
Is Ascendia making predictions about my health or my money?
No. It is a reflection tool. Nothing in it is medical, legal or financial advice, and it should not replace a professional you would otherwise consult. The app is careful to name what is being measured - an angle between two positions - rather than dress it up as a forecast.
Get Ascendia: Natal Birth Chart
A complete natal chart calculated on the device - planets, houses, aspects, transits, synastry and astrocartography.
How to enter your birth data so the chart is right
Almost every wrong chart traces back to this screen rather than to the maths behind it.
Find the time on the birth certificate or hospital record rather than a family recollection - remembered times cluster on the hour and half hour for a reason.
Enter the clock time exactly as it was written down, with no adjustment for daylight saving.
Pick the town of birth from the place search, not the nearest large city, since longitude moves the Midheaven.
If the birth was in a hospital in a neighbouring district, use the hospital location.
Cast the chart and check the Ascendant degree - if it sits within a degree or two of a sign boundary, the exact minute matters more than usual and is worth double-checking.
A time recorded to the minute deserves to be trusted more than any story about the birth, including a confident one.
A transit is a date range with a peak, not a mood that hangs over a month.
Open the transit list and find one that is applying rather than separating.
Read the exact date and the window either side.
Pin it to the Lock Screen so you see the orb closing rather than only the label.
Note what actually happens in the days around the exact date, in the day-book.
Come back after it separates and read your own notes - that record is worth more than any general description of the aspect.
Outer-planet transits can stay in orb for months and go exact three times because of retrogrades. The station dates tell you when to expect the repeats.
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