About critcalc
critcalc.app is three tools for Genshin Impact theorycrafting. Many of Genshin’s mechanics are hard to picture in your head. critcalc’s tools were built by a player who wanted to see them drawn out.
The tools
The team builder is a party setup screen for Stygian Onslaught, the Spiral Abyss, and your own lineups. Each team shows what it can provide (healing, shields, RES shred, buffs, and more), sourced from the kits at the constellations you own, and what switching out a team member would cost or gain. How it works
The rotation planner turns a rotation written in KQM notation into a timeline of casts and swaps, cooldowns, buff windows, and the enemy’s aura, timed frame by frame. You can also practice a rotation by playing it back at game speed with audio cues. How it works
The visualizers are eight small instruments, each about one mechanic: crit, elemental gauge, ICD, reaction scaling, the damage formula, enemy RES and DEF, artifact odds, and wish odds. How they work
Where the data comes from
Each character starts from genshin-db’s datamined kit and is then curated by hand. The effects, their conditions, and their constellation gates are written from the kit text, and frame counts are measured against gcsim wherever it has the character.
Curation is uneven, because some kits are much harder to model than others. Where a character isn’t finished, the tools say so rather than guess, and the coverage page shows what the rotation planner draws and what it leaves out.
Who makes it
critcalc is Nate West’s project. It is one person’s work rather than a team’s, but it leans heavily on what the community has measured. Corrections are welcome! The Contribute page says how to help.
Credits
- gcsim, the open-source combat simulator: frame data, tick cadences, ICD groups, targeting, and the reference for the gauge model.
- Keqing Mains: the notation the rotation planner reads, and the theorycrafting conventions the tools follow.
- genshin-db: the datamined kits every character starts from.
- The Genshin Impact Fandom wiki: kit details for newer characters, capability lists, and the artifact and wish rates.
- Lunaris.moe for Stygian Onslaught and Spiral Abyss data, and Stygian.moe for cross-checking season dates.
- GGanalysis, which the wish odds visualizer is tested against; and Genshin Optimizer and SiriYu’s reshape solver, the two models behind the artifact odds visualizer’s reading of a reshape.
- EODGamer’s crit heatmap, the spreadsheet the crit heatmap grew out of.
- Type is IBM Plex and Bitter; the interface icons are Lucide’s. Both are open-licensed.
A fan project
critcalc is an unofficial fan project, not affiliated with or endorsed by HoYoverse. Genshin Impact, its characters, and its artwork belong to HoYoverse. critcalc takes no money and shows no ads.
The code is licensed under the AGPL-3.0, and its source is on GitHub. The curated data is licensed under CC BY-SA 4.0. critcalc’s own artwork (the logo, the landing silhouettes, some icons, and the scene) is not covered by either.
