# Kenshy: Arena — Forecast calibration training

> Forecast calibration training (iPhone/iPad app by JAGO WHITLOCK.)

- Source: https://appshunter.io/ios/app/kenshy-arena/id6798447362 (this page in markdown: same URL + `.md`)
- Developer: [JAGO WHITLOCK](https://appshunter.io/developer/6798447364)
- Category: Productivity
- Price: Free
- Age rating: 17+
- Requires: iOS 17.0 · 8 MB
- Languages: American English
- Released: 2026-08-19
- Data updated: 2026-09-16

## What is Kenshy?

Kenshy: Arena is a practice room for forecasters. It grades your probability estimates against contracts that have already resolved, then audits the book you have actually built. It is not a broker, it places no orders, and it is not affiliated with any exchange.

DAILY CALIBRATION ROUNDS
Every day brings a deck of eight resolved prediction questions — real historical wording, category, closing date and the price the market itself finished at. The outcome stays hidden until you commit.
• Drag the probability dial, lock your forecast, and see the outcome instantly
• Per-question Brier score, market close comparison and a plain-English delta verdict
• Round scorecard with mean Brier, log loss, hit rate and a bias reading
• Practice sets of 5, 10 or 20 questions by category, drawn from unseen questions
• Live crowd tape showing how other devices forecast the same question

CALIBRATION PROFILE
• Ten-bucket calibration curve plotted against observed frequency
• Brier trend over your last 10, 30 or all rounds
• Per-category table showing where you read the world well and where you read it as a fan
• Confidence-band breakdown for forecasts below 20, mid-range and above 80
• Blowup count for every forecast more than 30 points from the outcome

PORTFOLIO DOCTOR
Type your open positions by hand — ticker, category, theme tags, side, size, average price in cents and resolution date. Positions never leave your device.
• Five diagnoses: category concentration, theme clustering, resolution-date bunching, directional tilt and price-band exposure
• Each diagnosis carries a severity level, a plain sentence naming the hidden correlation, and the single number that would clear it
• Risk score 0–100 with a letter grade and a ring that animates on recompute
• Resolution calendar showing which days carry too much of the book
• Capital at risk, maximum payout and break-even probability computed as you type
• Cross-check against signals that call your holdings already priced in
• Export positions, round history and the full Doctor report as files

SIGNALS FEED
• Headline-to-market cards: a story, a three-sentence summary, and the exact contracts it touches
• Priced-in score from 0 to 100 with a rationale for why the move is or is not already in the quote
• Vote "already priced in" or "room to move" and see the crowd split
• Filter by category, tracked items, or priced-in band
• Log a position straight from any contract card

LEADERBOARD AND STREAKS
• Weekly and all-time rankings by mean Brier against every device that played the same decks
• Rounds re-scored server-side, so scores cannot be edited on the client
• Seven-day streak strip and longest-streak tracking
• Fill Window, a sixty-second timing drill, keeps a streak alive on a day with no time for a full round

BUILT TO WORK OFFLINE
• The last deck, taxonomy, forty signals, every round, position and scorecard live on the device
• A round played offline is scored locally and uploaded when the network returns, keyed so a retry never double-counts
• Cached content appears immediately; a thin strip states when it was last refreshed

PRIVACY
No account, no email, no password. Identity is a single anonymous device code. Positions are never uploaded.

Educational tool. Not affiliated with, endorsed by, or connected to Kalshi. No trading, no orders, no money. Nothing here is financial advice.


## Version history (last 1 release)

### 1.0 — 2026-08-19

No release notes.

## More apps by JAGO WHITLOCK

- [Shuffle-coach](https://appshunter.io/ios/app/shuffle-coach/id6807999713)

All apps by JAGO WHITLOCK: https://appshunter.io/developer/6798447364

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-16.*