Setup

Set up once.
Then press Start.

A few minutes the first time. After that Sundial runs on its own, for as long as you leave it on.

01

Windows 10 or 11

Sundial is one 64-bit Windows program. Nothing else to install: no Python, no Node.

02

The game on Steam

A Steam account that owns Umamusume: Pretty Derby (Global). Sundial signs in with it once.

03

Each account's Data Link

The Trainer ID and Data Link password of every account you want Sundial to run.

Windows

Six steps to your first banked career.

  1. Put Sundial in a folder of its own

    Get Sundial.exe from the Download page. Sundial keeps your accounts, settings and statistics in folders beside it.

  2. Double-click Sundial.exe

    The first time, Windows may show Windows protected your PC: choose More info, then Run anyway. A small window opens: that window is Sundial, and closing it stops everything. The dashboard opens in your browser at 127.0.0.1:8780.

  3. Sign in with Steam, once

    With the Steam account that owns the game. Enter the Steam Guard code if asked. Sundial keeps an encrypted session, so it signs in on its own from then on.

  4. Add your accounts

    Under Accounts › Add account: a label, the Trainer ID and the Data Link password. Several at once? Add several takes one per line.

  5. Pick a preset, turn on training

    A preset fills the skills to buy and the races in one click. Then turn on Independent Training for the account.

  6. Press Start

    Watch the careers bank and the fan totals climb. Closing the browser tab changes nothing: open 127.0.0.1:8780 again any time.

While it runs

Want to play an account yourself?Press Stop first. The game and Sundial share one sign-in, so playing while the loop runs signs the other out.
A career left half-played in the gameThe game allows one career at a time. Finish or quit it in the game, or let Sundial clear it for that account.
Press Stop, any timeStop and Pause reach everything in progress. Inside a schedule window, Stop holds until the next one.

An empty picker on an account just means Sundial has not visited it yet: open the account and press Visit now.

Updates

Sundial checks for new versions by itself and installs a signed update from Settings › Updates. Roll back on the same page returns to the version you ran before. Your accounts and settings are never touched.

Your data

Accounts, settings, statistics and logs live in folders next to Sundial.exe. Back up that folder and you have backed up everything.

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