Blue Archive Gem Planner

Gems right now

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Lowest balance ahead

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Banners planned

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Count last updated

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Planning

Start	End	Banner / characters	Units	Planned spend	Income	Expected after	Actual gems	Lowest ahead	Room for extra?

Archive (0 past banners)

Start	End	Banner / characters	Units	Actual gems	Notes

Settings

Starting gem count

Starting count date

Monthly income

Default cost per unit

How this works

Your gem anchor is the most recent Actual gems you logged on a row. Everything below that row counts forward from it. Until you log one, the starting count in Settings is used.
Units is how many banners you want to spend on: 0 to skip, 1 or 2 (or more) otherwise. Each costs the default 24,000 from Settings, the worst case.
Income of 13,000 lands on the banner whose End date is the first to reach into a new month. That row is tinted green.
Expected after is anchor + income so far − planned spend so far. Red means it would go below zero.
Lowest ahead looks all the way to the end of your plan. At or above 0 means everything you have planned fits.
Room for extra? appears when that lowest point still covers another unit — you could add a banner without going short later.
Banners whose End date has passed are moved to the Archive automatically when you open the page. Log an Actual gems entry on the row you are currently on so the plan picks up your real count.