An AI co-manager that knows your roster.

It knows your roster, your league’s scoring, and where every team sits in its win window — so every lineup call, waiver claim, and trade verdict is priced for your league, not the average one.

  • Reads your leaguemate tendencies
  • Trade verdicts in seconds
  • You set the formula
  • Fantasy-tuned Claude AI

I play Redraft New draft every year I play Dynasty Your roster carries over

REDRAFT

An AI co-manager that knows your roster — every week it plays.

Set your lineup with the matchup-aware call, jump the waiver wire before your league does, and get a trade verdict before you hit send — free to start.

Season Pass

Your co-manager all season — waivers, start/sit, and trade calls every week.

Draft Day Pass

Draft night, covered — live AI picks while you're on the clock.

Also play dynasty? General Manager covers both games.



01 — It knows your league

The AI actually knows your league.

Connect Sleeper once. Every answer is priced to your league — not the average one:

  • Modeled format — PPR, TE premium, passing-TD points, Superflex/1QB, and team count shape Edge values. Other settings still load as context, but may not shape Edge values or AI adjustments.
  • Win window — rebuilding, rising, or contending phase for every team.
  • Leaguemate tendencies — who trades, who hoards picks, who churns waivers.

You

“Should I start my TE or my third WR in the flex this week?”

SharperSunday

Start the TE. Your league runs TE premium (+1.5 PPR at the position), so even a middling target share clears your WR3’s ceiling on points alone — and your flex spot rewards floor, not upside, given where you sit in the standings.

You

“What’s my TE actually worth if I shopped him?”

SharperSunday

His Edge value jumps in your league vs. a standard one — TE premium plus your Superflex setup move him up a tier. A contender in your league would pay a bit over market; a rebuilder won’t bite. I can flag which leaguemates are short at TE.

Illustrative example — your league, your values


02 — You set the formula

See where the market is wrong before your league does.

Every other fantasy tool blends production and market hype into one ranking and tells you to trust it. SharperSunday separates them and hands you the dials. Slide the weights for production and youth — find the players your leaguemates are overpaying for, and watch your power rankings reorder live.

Your dials, your formula — Strongest Lineup, Roster Value, Youth, and Draft Capital, each on its own slider. Tilt toward youth and draft capital, and the board re-ranks around it.


03 — The voice

Roast your friends with receipts.

Fantasy is a group chat with a sport attached. Every roast is grounded in your league’s real trades and tendencies — and doubles as scouting for your next deal.

Punt Coverage hasn’t drafted a TE in three years. Their highest-scoring TE since 2023 averaged 4.1 points a game. They’ve asked you for “WR depth” twice this month. You know what to do.

— League Lore, your league

The Backfield Boys traded Bijan in 2024 for a 2026 first and second. Bijan finished 2025 as a top-3 RB in all formats — and he’s still 24. They are 1–7. The receipts are public record — we just made them easier to find.

— Roast · Verified

Reverse Heimlich has traded every WR the second it hits 26 — three seasons clean. They think they’re beating the age cliff. They’re really selling two prime years cheap. Offer them anything young at WR, then collect the buybacks at 26.

— Trade Target

From the desk

I’m Mason. I’ve played fantasy since 2006 — redraft and dynasty, usually three leagues, usually the most active trader. I built SharperSunday because every tool I tried gave advice for the average league, and none of them had read mine. This one reads yours first.

— Mason · Founder, SharperSunday


Pricing

Win your league. Start free, finish Sharper.

Without league-aware AI, you’re working from the same script as everyone else in your league.

  • An AI that knows YOUR league — your roster, your scoring, your leaguemates’ tendencies. Not generic dynasty advice.
  • The biggest trades from every season your league has played, plus weekly recaps in-season — written up without the group-chat bias.
  • Trade values built from real dynasty trades, adjusted for Superflex and PPR — not a one-size-fits-all top-300.

Get started

Your co-manager is ready.

Create a free account, connect your Sleeper league, and get your first read in minutes.

Get your roster read →

FAQ

What you’re probably wondering.

Will this work with my league’s settings?

SharperSunday loads your connected league’s full configuration. Edge values model five dimensions: PPR, TE premium, passing-TD points, Superflex/1QB lineup shape, and team count. Other settings still load as context, but may not shape Edge values or AI adjustments. Sleeper leagues are fully supported, and ESPN public leagues can be connected without ESPN credentials (connect by league ID). Yahoo and MFL aren’t supported yet.

Why not just use ChatGPT?

Generic LLMs train on a snapshot and freeze — ask one about a trade and you’ll get last year’s depth chart and scoring rules that aren’t yours. SharperSunday pulls your live roster, your league’s actual settings, and current NFL context every time you ask.

Is my Sleeper data safe?

Yes. SharperSunday uses Sleeper’s public, read-only API — no password is ever required, and the app can’t make trades, drop players, or change anything in your league. We never sell your data or use it for advertising. We share information only with service providers that operate SharperSunday — for example, to host the app, secure accounts, analyze usage, catch errors, process payments, and power Claude AI features — as described in our Privacy Policy.

What happens if I forget to cancel the trial?

No surprise billing. Before you start the trial, the paywall shows the exact date you’d be charged, and we send a reminder email before the trial converts. Cancel anytime during the 14 days using the cancellation path for where you purchased, and you pay nothing.

Is a free account actually useful?

Yes — Bench is a real plan, not a demo. You get 5 AI chats a week, a daily trade evaluation, a monthly Lore report, and your own team’s Win Window, all grounded in your actual league. General Manager gives you the full experience — every AI feature and the whole league’s Win Windows.

What if I’m in a redraft league, not dynasty?

Both work. SharperSunday detects your format from Sleeper and tunes the advice — redraft leans into production and matchups; dynasty layers in age, draft capital, and your win window. Same chat, waivers, and trade tools either way.

Does General Manager cover redraft too?

Yes — General Manager is everything in Redraft, plus your dynasty co-manager. One plan, both games.

I'm in a keeper league — which door is mine?

Dynasty — your roster carries over. Keeper support is in Alpha: the dynasty toolkit works today, draft-day support is rolling out, and we build fastest where players ask. Tell us what you need: [email protected]