KTCalculator+

KTCalculator works out the odds behind a tabletop skirmish attack, so you can stop guessing and start deciding.

It is built for the table, not the desk. Everything runs on your device — no signal, no page to load, no account — so it works just as well in a game store basement as it does at home. And the matchups you care about are saved between games: the scenario you worked out last week is one tap away this week.

Enter the attacker's and defender's stats, pick the abilities and rerolls in play, and get the full probability picture instantly — average damage, chance to injure, chance to kill across every save value, and the complete damage distribution for the exact matchup in front of you.

BUILT FOR THE TABLE

• Save named scenarios and reload them mid-game — your regular matchups stay one tap away instead of being re-entered every time
• No signal needed — everything is computed on your device, instantly
• Copy one situation to the other to test a single change
• Keep-screen-awake toggle so the app doesn't sleep between activations
• Light and dark themes
• Haptic feedback and large, tappable steppers for the values you change most
• Tap any label for a plain-English note on what that rule actually does

WHAT IT DOES

• Shooting and melee (fight) calculators, each with the full rules interactions
• Average damage and standard deviation across every save value
• Injury chance and kill chance, laid out as a table you can read at a glance
• Damage probability histogram for the exact scenario you set up
• Side-by-side comparison — set up two situations and see which is better, colour-coded green / red / grey
• Combined-shot totals when you attack with both situations in a turn
• Reroll handling: reroll ones, reroll one die, reroll two, reroll all fails, crit-fishing, and the common combinations
• Success-manipulation abilities on both attack and defence
• Damage-reduction and ignore-damage effects
• Multi-round shooting, with per-battle ability limits tracked correctly

PRIVATE BY DESIGN

• Completely offline — the app doesn't even request internet permission
• No accounts, no ads, no analytics, no tracking, no data collection
• Everything you enter stays on your device
• One paid app, bought once — no subscriptions, no in-app purchases

HOW THE MATH WORKS

The probabilities are computed exactly, not simulated, wherever an exact answer is possible — so the same inputs always give the same answer, immediately. The calculation engine is a direct port of long-standing open-source (public domain) web calculators, and is verified against them by an automated parity test suite.

Credit to Jacob Egner (KT21Calculator) and John Farrell (ktcalc) for the original open-source math this app is built on.

IMPORTANT

KTCalculator is an unofficial, fan-made tool. It is not affiliated with, endorsed by, or sponsored by any game publisher. All trademarks are the property of their respective owners. The app ships no official rules content, datasheets, or stat pr