Z Tools

This is the toolkit we use ourselves on Server 277 — built by an active player to fix the gaps left by the in-game UI and the various wiki sites. Everything works in your browser, saves progress locally, requires no account, and is free to use. There's no “premium” tier.

What's in here: eleven free tools across event timing (Alliance Duel Calendar, Lucky Rose, Event Cycle), long-term progression (Research Trees, Tank Modifications, HQ Levels), reference data (Heroes, Buildings), spend planning (Lucky Discounter), the Season 3 building set (S3 Tile Upgrades) and the latest redeemable codes (Last Z Gift Codes). Use the chips below the descriptions to filter the grid by category — or read on for what each tool actually does.

The tools, grouped by what they do

Event & timing

Alliance Duel Calendar covers the 7-day VS event cycle with timezone-aware countdowns, the daily bonus schedule (Monday Vehicle, Friday Holistic Growth, etc.), and the optimal Radar / Lab / Construction windows for maximising daily points. Most useful Sunday evening when you're planning the week.

Lucky Rose Tracker logs the weekly Lucky Rose number — send exactly that many roses to another player and you (the sender) earn a personal buff that changes type and duration every week. The running log saves you remembering what each past week gave.

Free rewards

Last Z Gift Codes keeps a running log of redeemable codes. The latest code sits up top with a one-tap copy button, then a history of past codes with their rewards, source and expiry. Pair it with the redeem flow below the code.

Long-term progression

Research Trees tracks where you are in all 9 trees (161 nodes, 4.2M badges total) with prerequisite-aware navigation, a best value sorter for big windfalls, and a separate guide to when each tree unlocks. Tank Modifications tracks the 49 mods / 70.7K wrench tree that powers your vehicle — including the Cheetah → Hercules → Destroyer → Destroyer-EX milestones. HQ Levels is a static reference for what each HQ tier 1–35 costs and unlocks.

Reference data

Heroes covers all 26 heroes (Blood Rose, Guard of Order, Wings of Dawn) with full per-level skill effects, searchable by ability keyword. Buildings covers all 38 buildings with their unlock requirements and 30-level upgrade tables. Both are scraped from the live game data, not screenshots, so the numbers are exact.

Spend planning

Lucky Discounter calculates exactly which draw attempt you're on, refreshes done, and tickets remaining to the next guaranteed 90% Off (checkpoints at 5, 9, 18, 32). Tells you whether your next pull is worth doing or if you should bank your diamonds and wait. Event Cycle sits one level above that — it shows which of the four rotating diamond-spend events (Gacha Go, Bullseye, Lucky Discounter, Lucky Chest) is live now and what's coming up, with a live countdown so you can time your spending.

Seasonal

S3 Tile Upgrades covers the Season 3 (Everfrost Era) building set — Bio Lab, the Smart Greenhouses, and the three combat buildings (Icy Arsenal, Icy Fort, Command Post). Comes with the recommended priority order, max levels, per-level stats (Virus Resistance, Icebloom output, +Season ATK/DEF/DMG percentages) and an editable cost tracker seeded with confirmed in-game values that fills in as you upgrade and saves to your browser.

When things break

If the game itself is misbehaving, the Troubleshooting Last Z wiki article covers the most common errors and fixes — connection errors (including C000 13), app crashes, stuck loading screens, the in-game Clear Cache / Clear Mail Cache controls, account binding, lost-account recovery and payment issues.