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Changelog
Recent updates and improvements to The Prop Professor.
Mobile App: Sign In With Your Account + Kelly Staking
August 10, 2026- •We've made a ton of improvements to the mobile app — the headline: the app now has real login.
- •Sign in with your Prop Professor account directly in the app — the same Google, Discord, or email login you use on the web. No more generating a one-time code on desktop and typing it into your phone.
- •Already linked with a code? You're fine — existing linked devices keep working, and older app builds can still use the code flow. But signing in is the way forward, so switch over when you update.
- •Kelly staking is now in the mobile app. See recommended bet sizes based on your bankroll and Kelly settings, just like on desktop.
- •Update the app from the App Store (iOS) or Google Play (Android) to get everything above.
Sharp Book Selection, Arbitrage Pairs + League Controls
August 10, 2026- •Smart Money now has sharp book selection — choose exactly which sharp books you care about, and you'll only see bets driven by the sharps you trust.
- •Arbitrage now supports arbitrage pairs — pick which books you want to see arbs between, so the page only shows opportunities across books you actually use.
- •You can now select and deselect specific tennis and soccer leagues, so the tours and competitions you don't care about stay out of your way.
- •General UI/UX improvements across the board — cleaner layouts and smoother interactions on every page.
Site-Wide Design Refresh
August 9, 2026- •We've rolled out a big batch of UI and UX improvements across the whole platform — the optimizer pages, settings, modals, tables, and more.
- •The changes are purely aesthetic: every tool works exactly the way it did before, it all just looks and feels better.
- •A lot of this came directly from feedback people shared in our Discord — thank you to everyone who spoke up!
- •Have thoughts on the new look, or spot something that seems off? Join our Discord and let us know — we read everything.
Instant Auto Refresh — Now On by Default
August 9, 2026- •We've rebuilt how odds get to your screen. Instead of re-fetching the whole board every few seconds, odds changes now stream to the page the instant they happen — auto refresh is truly real-time.
- •Auto refresh is now enabled by default on every odds page: +EV, Arbitrage, Fantasy, Comparison, Smart Money, and the Odds Screen. Comparison and Smart Money have auto refresh for the first time.
- •Turning auto refresh off freezes the board so nothing moves while you're working a line — flip it back on (or hit refresh) and you're instantly caught up to the live board.
- •This also makes the site lighter on your connection — updates only ship what changed instead of the full board every few seconds.
Underdog One Click Fixed + ParlayPlay One Click Added
August 8, 2026- •Underdog One Click is back online. Underdog's site redesign broke the old hand-off — the Chrome extension has been rebuilt to work with the new site.
- •ParlayPlay One Click is here for the first time. Build a slip on our platform, hit one click, and it'll be waiting in your ParlayPlay bet slip when the site opens.
- •Both apps work through our Chrome extension, which means they're desktop-only. Install the extension from the link below — and if you removed it after our last One Click update, you'll need to reinstall it for these two apps.
- •PrizePicks, Betr, and DraftKings Pick6 are unaffected — their One Click links keep working without the extension, on both desktop and mobile.
- •Head to the One Click page for full setup instructions.
Update Your App — One Click Is Now Live on iOS and Android
August 6, 2026- •The mobile app update is out. Update PropProfessor from the App Store (iOS) or Google Play (Android) to get it — One Click will not work until you do.
- •Once you've updated, you can build a slip on your phone and send it straight to the fantasy app in one tap, no Chrome extension and no copying picks over by hand.
- •One Click in the app is still in testing. Some apps and some pick types may not hand off cleanly yet, and we're actively fixing what comes up.
- •If you run into an issue, let us know in Discord — tell us which fantasy app, which picks, and what happened, and we'll get it sorted quickly.
Breakthrough: Betr Alts Now Have Real Implied Odds
August 6, 2026- •We've made a big breakthrough in calculating the optimal slip type for Betr alt picks. Betr never publishes odds for Boosted, Mini Boosted, Super Boosted, or Edge picks — we reverse-engineered how their payouts actually work and can now quote real implied odds for every alt type.
- •Betr (Alt) picks now carry those implied odds across the platform, so you'll see Betr (Alt) as a column on the Odds Screen alongside every other book.
- •On the Fantasy page, Betr (Alt) rows now light up green when a pick beats its break-even — each alt type's pill shows the hit rate it needs.
- •The implied odds assume each pick is placed in its optimal slip structure, which varies by alt type. Read the "How It Works" button on the Betr (Alt) fantasy page to understand how the pricing works and how to build your slips to actually capture the value.
Underdog Optimal Slip Type Updated — 4-Leg Insured
August 5, 2026- •Underdog's optimal slip type has changed. The best play is now 4-leg insured, and it's extremely profitable — each leg only needs to be priced at -107 or better for the slip to be profitable.
- •That's one of the lowest break-evens of any slip type on any fantasy app, so it's well worth building your Underdog slips around it.
- •This replaces the old 2-man power recommendation — the platform and the Slip Generator now reflect the updated payouts.
One Click Completely Reworked — No More Chrome Extension
August 5, 2026- •One Click has been rebuilt from the ground up. The Chrome extension is retired — you no longer need to install or update anything to place slips.
- •We're pushing a mobile app update shortly. Once it's out and you've updated, One Click will work directly in the app — build a slip on your phone and send it straight to the fantasy app.
- •Bet Slip hand-off is now supported on most of the fantasy apps we cover.
- •We're still working on the remaining apps that aren't supported yet — Dabble is the main one, and it's our top priority.
- •If you still have the old Chrome extension installed, you can safely remove it.
Liga MX, MLS, NPB, KBO and NFL Preseason Added
August 5, 2026- •Added Liga MX and MLS on the soccer side, plus NPB (Japan) and KBO (Korea) baseball.
- •NFL preseason is also now live, so you can start hunting value before the regular season kicks off.
- •All of these are live across every optimizer (+EV, Arbitrage, Smart Money, Fantasy, Comparison, Slip Generator, Odds Screen) and work exactly like the leagues you already use.
- •NPB and KBO show up alongside MLB, Liga MX and MLS show up under soccer, and preseason games show up under NFL.
- •Coverage depends on which books post these leagues, so you'll see fewer comparison books on them than on the major US leagues.
All Services Back Online
August 4, 2026- •Maintenance is complete and the platform is fully back online.
- •All optimizers (+EV, Arbitrage, Smart Money, Fantasy, Comparison, Slip Generator, Odds Screen), notifications, and the mobile app are running normally again.
- •Thanks for your patience while we made these improvements!
Maintenance In Progress
August 4, 2026- •Scheduled maintenance has begun as of 9am EST.
- •Update: maintenance has been extended. The platform will now be down until approximately 1pm EST today.
- •We'll post an update here and in the notifications feed once everything is back online. Thanks for your patience!
Scheduled Maintenance — August 4th, 9am-12pm EST
August 3, 2026- •We will be performing scheduled maintenance on Tuesday, August 4th from 9am to 12pm EST.
- •The platform will be down during this window — all optimizers, notifications, and the mobile app will be unavailable.
- •We apologize for the inconvenience and appreciate your patience while we make these improvements.
Soccer Added for the World Cup
June 9, 2026- •Soccer is now live across every optimizer (+EV, Arbitrage, Smart Money, Fantasy, Comparison, Slip Generator, Odds Screen) just in time for the World Cup.
- •All of your usual tools work the same way for soccer — find +EV bets, arbs, and value plays across the books and fantasy apps we support.
- •Coverage is focused on the World Cup for now. Enjoy the tournament!
iOS App Is Live on the App Store
June 4, 2026- •Prop Professor is now available on the Apple App Store — no more TestFlight! Download it directly here: https://apps.apple.com/us/app/prop-professor/id6746730656
- •If you were running the old TestFlight build, delete it and install the App Store version to keep getting updates. The TestFlight build is being retired.
- •Already linked your device? Nothing changes — your saved presets and notification settings carry over. Just sign in on the App Store build and you're good to go.
- •Setup steps are on the Mobile App page: install from the App Store, sign in, and link your device with the one-time code.
- •Enjoying Prop Professor? Please take a second to leave us a positive review on the App Store — it genuinely helps more bettors find us and keeps the project growing. Thank you!
Android App Is Live + Discord Notifications Retired
June 4, 2026- •Our Android app is officially live! Head to the Mobile App page to get set up — it walks you through joining our Android testing group and installing the app on your device.
- •Heads up: the Android app isn't on the Google Play store just yet, but we're actively working on getting it there. For now, setup runs through our testing group (full instructions on the Mobile App page).
- •iOS users: the app will be in the App Store shortly. Until then, the TestFlight build is the way in — again, see the Mobile App page for steps.
- •We've shut off Discord notifications. The mobile app provides fully customizable, per-preset notifications and is a better experience all around — so going forward, notifications live in the app (and your desktop browser) rather than Discord.
Desktop (Browser) Notifications
June 1, 2026- •You can now get notifications delivered straight to your desktop browser — the same +EV, Arbitrage, Smart Money, Fantasy, and Comparison alerts the mobile app sends, with no phone required.
- •Head to the Notifications page, click "Enable browser notifications", then choose which saved presets you want delivered. Each preset has independent Mobile and Browser toggles, so you can send a preset to your phone, your desktop, both, or neither.
- •Browser notifications work alongside the mobile app — enable one or both. Clicking a notification takes you straight back to the platform.
- •Added a "Send test notification" button (on both desktop and mobile) so you can confirm everything's wired up without waiting for a live bet to fire.
Mobile App Revamp + Notification System Overhaul
May 29, 2026- •The mobile app has been completely rebuilt. It now has the same functionality as the desktop frontend — every optimizer (+EV, Arbitrage, Smart Money, Fantasy, Comparison, Slip Generator, Odds Screen, Calculators) — just curated for a phone-first workflow.
- •Saved presets and global settings sync across desktop and mobile, so anything you configure on one shows up on the other.
- •Notification system rebuilt from the ground up — significantly faster, and each notification carries the full bet payload so the mobile app can render the same rich card you'd see on the corresponding page.
- •Notifications now show comparison data (other books' odds, exchange liquidity for Smart Money, both legs for Arbitrage) and you can add legs to a bet slip directly from Fantasy / Comparison notifications.
- •Each notification has a refresh button — tap it to re-fetch the bet from the live page and see what's changed since the notification fired. If the bet is no longer available we say so directly.
- •+EV advanced settings have been rebuilt around a new custom devigging engine with a precomputed-defaults fast path. Because the underlying schema changed, you'll need to re-create any +EV notification presets and advanced filtering rules you had configured — they don't migrate forward automatically.
- •Notification setup (toggling which saved presets push to your device) has moved into the mobile app itself. The desktop's /notifications page is now a Mobile App page that walks through linking your device and explains what the mobile app offers.
- •Mobile app users: update to the latest TestFlight build to access the new notification UI, per-card refresh, slip-add from notifications, and the new +EV advanced settings panel. Older app builds will keep working but won't show the new features until you update.
- •Android: we're working hard to get the mobile app on Android. We're also working on App Store distribution so you won't be tied to TestFlight forever — both are top priority right now.
PrizePicks (Alt) and Betr (Alt) Added to the Fantasy Optimizer
May 26, 2026- •Added dedicated PrizePicks (Alt) and Betr (Alt) sections to the Fantasy Optimizer, with an alt-type pill selector (Demon/Goblin for PrizePicks, Edge 1/Edge 2/Mini Boosted/Boosted/Super Boosted for Betr).
- •Important: neither PrizePicks (Alt) nor Betr (Alt) has true implied odds because of how many slip types are possible — the only way to get an accurate EV is by building a slip in the Bet Slip tool.
- •For Betr, within each alt-type section the top play by value will give you the best implied odds. But with 5 different alt types and up to 8 legs, there are millions of possible slip combinations, so it's impossible to calculate EV for an individual leg — you can still calculate EV for a full slip though.
- •For PrizePicks demons and goblins, the payouts make no sense — one goblin can differ from another drastically in payout, and the same goes for demons. The only way to know the payout you're going to get is by creating a slip. This is a poorly built product on PrizePicks' side, not something we can fix.
- •Bottom line: for both Betr (Alt) and PrizePicks (Alt), you find value by creating slips in the Bet Slip tool on our platform, checking the EV, and then using the one-click tool to place them. The listed value is the hit rate, just like regular fantasy apps.
Optimizer & Bet Slip Update
May 22, 2026- •Combined Fantasy and Alt Fantasy pages onto just one Optimizer page for ease-of-use.
- •Simplified Fantasy and Alt Fantasy filters by removing advanced and replacing with minimum comparisons.
- •Significant Bet Slip improvements, particularly with displaying errors.
- •Added the ability on the settings page to hide by book, by optimizer, or globally.
- •Various visual and quality of life improvements.