Productivity
Forecastly
A personal calibration journal. Get better at being right.
ios· Free · all features included ·By All Things AI, Inc
Free. All features included.
No subscription, no in-app purchases, no paid tiers. Everything you see works the moment you install it.
About this app
What Forecastly does
Forecastly is a calibration training app for people who want to forecast better — not for money, but to know whether their gut is actually right. You enter a prediction with a probability ("60% chance the Fed cuts in June"). When the event resolves, you log the outcome. Forecastly computes your Brier score across categories, draws the calibration curve, and shows where your confidence drifts from reality. What's in v1: — Pose-a-prediction: ten quick categories (politics, weather, sports, work, household), free-text question, slider for probability, resolution date. — Resolve: when the date arrives, Forecastly nudges you to mark the outcome. — Calibration curve: across all your resolved predictions, the classic 'confidence vs outcome' plot. The diagonal is perfect calibration; the gap shows where you're overconfident or underconfident. — Brier score per category: Tetlock's standard accuracy metric, broken out so you can see if you're better at sports than at politics (most people are). — No money. No betting. No social leaderboard. The app is for you. Free.
Features
Built to be useful, not noisy.
Ten-category question entry
Slider probability + resolution date.
Resolution nudges
Per-date reminders to log outcomes.
Calibration curve + Brier
Personal accuracy over time.
Category breakdown
Per-category accuracy.
Why it exists
The problem
The Agentic Economy PDF §3.3: AI agents are 3-5x more profitable than humans on prediction markets. The human edge — calibration — is trainable but rarely practiced. Tetlock's Good Judgment Project showed forecasters can be trained, but consumer practice apps are nonexistent (Metaculus is community-tournament; Good Judgment Open is research-grade).
What's different
How Forecastly stands out
Forecastly is the only iOS app that's PURELY personal calibration training. Metaculus is a public-tournament site. Manifold is play-money markets. Good Judgment Open is research-grade web. Forecastly is the daily practice journal — no community, no money, just the curve.
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FAQ
Questions about Forecastly
How much does Forecastly cost?▾
Forecastly is free. All features are included from day one — no subscription, no in-app purchases, no paid tiers. Everything you see in this listing works the moment you install it.
Where does Forecastly store my data?▾
On your device. Forecastly is built privacy-first: no account is required, no analytics SDKs, no third-party trackers. Nothing is uploaded to a server we control — the app works without one.
What platforms does Forecastly support?▾
iOS, on iPhone and iPad. You can find the latest availability on this page.
How do I get support for Forecastly?▾
Use the Support link on this page, or email support@allthingsn.com. We answer every message and keep responses on the same thread.
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