How Memorize Earth Tracks Mastery and Progress

Memorize Earth tracks your learning in two layers: a per-question history that feeds spaced repetition, and a per-category mastery count that shows how many questions in each category you've mastered, are still learning, or haven't seen. Progress is stored in the browser, and the settings panel gives you two separate reset controls — one that re-surfaces old questions while keeping your stats, and one that erases everything.

What the mastery numbers mean

Open Settings and look at the Categories section. Each category shows a count in the form mastered · learning · unseen / total. The three states are:

• Mastered — questions the game considers solid for you.
• Learning — questions you've attempted but haven't locked in yet.
• Unseen — questions you haven't encountered.

The board itself reflects this: the site describes its spaced-repetition tracking as something that improves your results "slowly, over time, if you continue to use this browser." In other words, mastery isn't a one-time quiz score — it's a running record of which questions you've proven you know and which need to come back.

How progress is saved

Progress is tied to the browser you play in, not to an account. Two details from the settings panel confirm this:

• Settings save automatically as you change them.
• A Disconnect Cloud Sync action exists alongside the local reset options, so any synced copy is separate from the browser-stored history.

The practical consequence: if you clear your browser data or switch devices without syncing, your mastery and history go with it. Play in the same browser to keep the spaced-repetition record building.

The two reset controls — and which to use

These are easy to confuse, so here's the difference in one table:

Use Reset Question History when you want a fresh mix of questions on the board but don't want to lose your mastery record. Use Forget Everything only when you genuinely want a clean slate; the confirmation warns it will be "like starting over from scratch."

Note that category filter changes are different again: they apply on your next New Board, not immediately.

Modes that shape what gets tracked

The mode selector changes which questions you'll face, which in turn shapes your mastery data:

• Standard Board — the full Jeopardy-style board.
• New Stuff Only — surfaces unseen material.
• Drill Weak Spots — targets questions you're still learning.
• Flag Drill — a focused flag-only session; the game's own warning screen suggests starting here.
• God Mode and others — harder or themed variants.

If your goal is to move questions from "learning" to "mastered," Drill Weak Spots is the most direct route, since it concentrates on exactly those items.

A realistic example

Suppose you've played a few boards and your Countries category reads 12 · 9 · 4 / 25. That means 12 country questions are mastered, 9 are in progress, and 4 are unseen. To close the gap, run a Drill Weak Spots session to work the 9 learning questions, then a New Stuff Only board to surface the 4 unseen ones. Check the Categories count afterward — mastered should climb. If you want the board to mix in questions you haven't seen in a while without losing that record, use Reset Question History rather than Forget Everything.

Common snags

• Progress "disappeared" — most likely a different browser, a cleared cache, or a device without cloud sync connected.
• Board looks the same after changing categories — category filters apply on the next New Board, not the current one.
• Mastery feels stuck — the game is deliberately hard and expects gradual improvement; use the drill modes rather than expecting a perfect board early.
• Unsure which reset to press — if you only want old questions to reappear, choose Reset Question History; Forget Everything is irreversible.