🔒 Privacy
Last updated 2026-09-17.
The short version
kayco.app is a static website. There is no server-side application, no database, and no user accounts. Everything you paste or click is processed by JavaScript running in your own browser, and nothing you enter is ever transmitted to us.
What the tools store, and where
To remember your inputs between visits, the tools save data in your browser's localStorage. It stays on your device, is only readable by this site, and is removed if you clear site data in your browser.
trounce-recommender-v1— your pasted GOOD export, character/talent selections, and Gem Planner settings (Genshin tools).zzzRoster— which ZZZ agents you own and their Mindscape / W-Engine levels.zzzBatteryPlan— your Battery Planner mode and selected team.supportStripDismissed— whether you closed the "Was this useful?" bar.
The Roster Builder's Clear All button removes the roster entry; clearing this site's data in your browser removes everything. Your GOOD export can contain your in-game UID; it is never uploaded.
Third parties
- Cloudflare hosts the site (Cloudflare Pages) and provides Cloudflare Web Analytics, a cookieless, privacy-first counter of page views and referrers. It does not use cookies or fingerprint visitors, and it does not see anything you type into the tools.
- Google Fonts serves the heading typeface; your browser requests the font file from Google when the page loads, subject to Google's privacy policy.
- Ko-fi — the support button is a plain link to ko-fi.com. No Ko-fi script runs on this site; anything you do there is covered by Ko-fi's own policy.
- Feedback form — if you choose to open the feedback form, it is hosted by a third-party form provider and only receives what you type into it.
There are no advertising or tracking cookies. If that ever changes, this page will say so first.
Game data
Character, material and boss data are baked from public community datasets credited in the footer. kayco.app is a fan project and is not affiliated with or endorsed by HoYoverse / COGNOSPHERE.
Contact
Questions or removal requests: use the feedback form, or message via the Ko-fi page.
🎮 Genshin Impact
⚡ Zenless Zone Zero
🔒 Private by design
Every tool on kayco.app runs entirely in your browser. There is no server, no account, and nothing is uploaded — your GOOD export and roster are processed locally and stored only in your browser's localStorage. Not affiliated with HoYoverse.
A free Genshin Impact weekly boss calculator. Paste a GOOD export, tick the characters and talents you are levelling, and the Trounce Domain Recommender ranks all 14 weekly bosses by how many talent materials you still need — with the deficit per material and the number of runs it takes.
1 Load your account
Paste your GOOD-format export from Irminsul or Inventory Kamera. 🔒 Processed in your browser — never uploaded.
❓ How it works
Which weekly boss should I farm in Genshin Impact?
The one whose talent materials you are short on for the characters you are actually building. Every weekly boss (Trounce Domain) drops three talent-level-up materials, and each character needs exactly one of them to raise a talent past level 6. The recommender adds up what your selected characters still need, subtracts what is already in your inventory, and ranks the bosses by the size of that deficit. A boss you have a surplus for is listed as satisfied at the bottom.
How many weekly boss materials does a character need?
Per talent: 1 at level 7, 1 at level 8, 2 at level 9 and 2 at level 10 — 6 to take one talent from 6 to 10, 12 for Skill and Burst, and 18 for all three. Levels 1–6 use no boss materials at all. The tool lets you set a target per talent, so a character you only take to 8/8/8 is counted as 4 materials, not 18.
How many runs does the estimate assume?
A weekly boss drops 2–3 of its talent materials per clear; the planner uses an average of 2.7 and rounds up, so a deficit of 6 shows as 3 runs. Your first three Trounce Domain rewards each week cost 30 Original Resin; after that they cost 60. Surplus materials from the same boss can be converted 1:1 with Dream Solvent, which the results mark as convertible.
Where do I get a GOOD export?
GOOD (Genshin Open Object Description) is the JSON format used by Genshin Optimizer. Scanners such as Irminsul and Inventory Kamera read your characters, talents and inventory from the game client and produce one; Genshin Optimizer can also export its database in this format. Paste the JSON into Step 1. It is parsed in your browser and never sent anywhere.
Is this a trounce domain calculator or a weekly boss material calculator?
Both. Trounce Domains are the weekly boss fights (Stormterror, Wolf of the North, Childe, Azhdaha, La Signora, Raiden Shogun, Shouki no Kami, Guardian of Apep, the Narwhal, the Knave and the newer bosses), and their drops are the weekly boss talent materials. This weekly boss material calculator reads what you own straight from a GOOD export instead of asking you to count, so the answer to "which weekly boss should I farm" is specific to your account.
Does it cover every weekly boss?
Yes — all 14 Trounce Domains from Stormterror and the Wolf of the North through the Fontaine, Natlan and Nod-Krai bosses, with the game version each was added in. Bosses newer than the baked data are flagged as beta. Character-to-boss mappings come from the same data the game uses for talent costs, so a new character maps to the right boss as soon as the data is rebaked.
A free Genshin Impact ascension gem calculator. Load your GOOD export and see whether your Slivers, Fragments, Chunks and Gemstones are enough to take every character you care about to level 90 — counted per tier, because gems only craft upward — plus the Dust of Azoth cost of any cross-element conversions.
1 Load your account
Same GOOD export as the Trounce Recommender — load it in either tool and both stay in sync. 🔒 Processed in your browser — never uploaded.
❓ How it works
How many ascension gems does a character need to reach level 90?
A full 1→90 ascension costs 1 Sliver, 9 Fragments, 9 Chunks and 6 Gemstones of the character's element — the same for 4★ and 5★ characters. Measured in Slivers that is 1 + 27 + 81 + 162 = 271. The planner only counts the ascensions a character still owes, so someone already at ascension 4 needs just the last two phases.
Can I convert ascension gems in Genshin?
Two ways, and the difference is the whole point of this tool. At the crafting bench you can combine 3 gems into 1 of the next tier up (3 Slivers → 1 Fragment, 3 Fragments → 1 Chunk, 3 Chunks → 1 Gemstone) for free — but never the other way. You can also convert a gem of one element into the same tier of another element for 1 Dust of Azoth each. There is no way to turn a Gemstone back into Chunks.
Why does it say I'm short when I seem to have enough gems in total?
Because gems only craft upward. If you own 30 Chunks but only 2 Gemstones and a character needs 6 Gemstones, the 30 Chunks can be crafted into Gemstones — but 40 Gemstones and 0 Chunks would leave you short on Chunks with no fix. Naive "total gems" calculators assume a downgrade path that does not exist. The planner resolves need tier by tier from Gemstone down, spending each tier's own stock, then cross-element conversions, and only then crafting up from below.
Which elements are safe to convert away?
The planner runs twice: once on the characters you selected (can you reach 90?) and once with a reserve of extra full ascensions per element added on top. Whatever surplus survives the second pass is labelled safe to convert, so you can feed a new character of another element without silently starving a future one. Adjust the reserve to be more or less conservative.
How much Dust of Azoth does it cost to convert ascension gems?
One Dust of Azoth per gem, at any tier — converting a Gemstone costs the same 1 Dust as converting a Sliver, which is why the planner converts at the highest tier it can and only breaks a need down to lower tiers when it must. Dust of Azoth comes from Paimon's Bargains and events. The conversion plan lists every conversion it needs and the total Dust, so it doubles as a Dust of Azoth calculator for your specific roster.
Which characters are selected by default?
Characters that still owe ascensions and rate S or higher on genshinRater's tier list. Planning gems for characters you will never build is noise, but you can widen the cutoff or tick anyone by hand. The Traveler is excluded: Brilliant Diamond sits outside the conversion economy and GOOD exports do not track it.
A free Zenless Zone Zero Drive Disc farming planner. Pick the agents you are building and it ranks all 15 Area Patrol stages by how many Drive Discs your team can actually use per 60 Battery, tells you which stage to farm first, and which stages to skip.
1 Your roster
Every Area Patrol stage drops exactly two Drive Disc sets for 60 Battery, so a stage where both sets are ones you want is worth twice the battery of one where only one is. Mark the agents you own below — it is the same roster as the ZZZ Roster Builder, saved in this browser, nothing uploaded.
Loading roster…
❓ How it works
Which Area Patrol stage should I farm for Drive Discs?
The stage where both of its Drive Disc sets are ones your team wants. Area Patrol is the only targeted source of Drive Discs: each of the 15 stages drops exactly two sets, and a run costs 60 Battery Charge (2–3 S-rank and 5 A-rank discs at level 60). A stage where only one set is useful returns roughly half the value of a stage where both are. The planner scores every stage by usable discs per run and emits a farm order.
How does it know which sets my agents want?
From community build guides: each agent has a recommended 4-piece set and one or more 2-piece effects. The 2-piece part is matched by effect, not by set name — Freedom Blues, Chaos Jazz and Feathered Fate all give Anomaly Proficiency +30, so any of them satisfies that need. Pick specific agents to plan for a team, or use your whole owned roster.
Which Drive Disc should I farm in ZZZ?
Start with the 4-piece set of the agent you are building right now — a 4pc need is four specific discs and only one or two stages drop that set, so it is the scarce part of any build. 2-piece needs are flexible: they are an effect (Anomaly Proficiency, Ether DMG, ATK%…) that several sets provide, so they are usually covered by whatever else the stage drops. The planner encodes exactly that: a 4pc need is worth more than a 2pc need, an agent's only viable set outweighs one of four options, and a stage whose two sets both serve your team beats one where only one does.
How is the stage value calculated?
Every selected agent contributes the same total demand, split across their recommended 4-piece sets and 2-piece effect classes by rank (each lower-ranked option is worth 60% of the one above). A set's value is the 4pc demand for that exact set plus the 2pc demand for its effect class, with partial credit for near-equivalent classes. A stage's Value is the sum of its two sets' values, scaled so the best stage for your team reads 100; ties break on how many sets are wanted and how many agents are served. The farm order is greedy: once a run covers an effect, other sources of that effect stop counting, so the list tells you what to run next rather than listing the same need five times.
What about stages to avoid?
Stages where neither set is wanted by anyone you selected are listed separately so you don't spend Battery there. Ether Batteries (auto-combat, up to four queued) follow the same ranking — the plan is about where the Battery goes, not how you clear the stage.
Nothing here
The address may be mistyped, or the page moved. These are all the tools on kayco.app: