Three ways results are decided
| Type | Same input again | Example |
|---|---|---|
| Random | May change every time | Draw-a-card fortunes |
| Date-based | Changes every day | Daily horoscopes |
| Fixed (deterministic) | Always identical | A constellation from name and birthday |
My Constellation is the third type. It folds your name and date of birth into a single number, and that number decides the star layout and the meaning. The same input gives the same constellation today and ten years from now. Tonight’s Starlight is the exception: it also uses the date, so it changes daily.
When the input changes slightly
These rules follow how the app computes its result.
| Difference in input | Result |
|---|---|
| Spaces before or after the name | Ignored (same result) |
| Upper or lower case (Minji / minji) | Same result |
| A space inside the name (Mary Ann / MaryAnn) | Different constellation |
| Full name, nickname or name in another script | A different constellation each |
| Birth date one day off | Different constellation |
| Same name and same birthday as someone else | Same constellation |
Which date to enter
The app takes one date from a calendar picker. If you were born near midnight in another country’s time zone, or celebrate a birthday on a traditional lunar calendar, pick one date and always use it. Different dates are different inputs and give different constellations. When comparing with friends, agree on the same rule.
Reading the rarity grade
Each constellation gets Common Sky, Rare Sky, Precious Sky or Legendary Sky plus a “Top X%.” According to the store listing, the grades were measured against 300,000 samples, and they come from shape features such as the number of stars, a closed loop, spread and brightness. They say nothing about personality or luck.
Checking it in the app
The sample name and journal text in these screenshots were typed in Korean; the app itself runs fully in English.
Enter the same input again
On the first tab, clear the name and enter the same name and birthday again: the same constellation comes back. Lines you redrew and wish stars are saved with that constellation and return too.
Check the grade and meaning
Look at the grade badge and top percentage next to the constellation name, along with element, guardian star, lucky number and nature.
Back up before changing phones
The constellation can always be recreated from the same input, but your Collection, star journal and redrawn lines live on the device. Use Backup / Restore in settings to move them in a single file.
FAQ
Can I reroll a result I don’t like?
Not with the same input. You can, however, redraw the lines yourself with Draw Your Lines; the meaning stays the same.
Does switching the app language change the result?
No. The language setting only changes the text shown. Typing your name in a different script, though, is a different input.
My Constellation - Star Sign
One constellation drawn from your name and birthday. No sign-up, fully offline, free on Android.