If you have spent any time on PrizePicks or other pick'em apps, Boom Fantasy is the next one worth a look, especially in states without legal sports betting. The catch is that the format you choose changes whether you are getting a fair shake or the implied odds quietly work against you. Here is how Boom Fantasy actually works, which contests to play, and how to claim the OS7 sign-up bonus before you put a dollar in.
In Summary (TL;DR)
- Boom Fantasy Is A Daily Fantasy Sports (DFS) Pick'em App: you take the over (or, on Toss-Ups, the under) on player props (strikeouts, home runs, touchdowns) and combine them into one entry that can pay up to 40x.
- Three Formats: Pick'Em Toss-Ups (over or under, the closest to fair odds), Pick'Em Long Shots (overs only, up to 40x), and Pick'Em Favorites (overs only, capped near 3x).
- Play The Toss-Ups. Their payouts track real sportsbook odds far better than the Long Shot or Favorite formats, where the implied odds work against you.
- Turn Coverage Off And Let It Ride. Coverage is insurance that shrinks your top payout; if you are chasing the full 20x on a 5-pick card, you do not want it.
- Free Squares Are Boom's Real Edge and the most +EV play on the app, so prioritize the legitimate ones.
- Claim The Bonus First: code OS7 unlocks a $100 no-sweat first entry, so a losing first entry comes back as bonus funds.
- Find The +EV Picks by comparing Boom's lines to true sportsbook odds. OddsShopper does that for you across 100+ books.
Watch The Video
OddsShopper's full Boom Fantasy walkthrough and app review is embedded below. Watch on YouTube.
What Is Boom Fantasy?
Boom Fantasy is a pick'em DFS app, the same broad category as PrizePicks and Underdog. Instead of drafting a salary-cap lineup, you make a series of over/under predictions on individual player stats and bundle them into a single entry. If you hit your picks, the entry pays a multiplier on your stake, up to 40x in the right format.
What sets Boom apart is its format menu. Boom splits its board into Toss-Ups, Long Shots, and Favorites, and it leans hard on Free Squares (more on those below). You can also search for a specific player instead of scrolling the full board game by game, a small but useful feature that saves real time on a busy slate.
Because Boom's lines are player props at heart, you can sanity-check any of them against the real market on the OddsShopper player props screen before you lock a pick.
Claim Your $100 No-Sweat First Entry (Promo Code OS7)
The best value on any pick'em app comes from the bonuses, so claim yours before you build a single card. Sign up with promo code OS7 for a $100 no-sweat first entry: if your first entry loses, you get the full amount back in bonus funds, up to $100. (Sign up on Boom Fantasy with code OS7.)
The host's own recommendation is to use as much of the no-sweat entry as your bankroll comfortably allows. If it wins, your bankroll grows; if it loses, the stake comes back as bonus funds you can put back into play, subject to Boom's terms. The mechanics are the same whether you fire $10, $50, or the full $100, so pick an amount you are comfortable with and take advantage of the no-sweat protection while it is on the table.
Boom also runs a refer-a-friend offer worth $25 for inviting a friend to the platform. You will find it under More > Invite a Friend in the app; it pulls up a shareable link you can text or DM. It is bankroll you are adding for free, so it is worth sending to anyone who was going to try the app anyway.
The Three Boom Fantasy Formats
Choosing the right format is the single most important decision on Boom, because the implied odds are very different across the three.
| Format | Picks per entry | Direction | Max payout | Verdict |
|---|---|---|---|---|
| Pick'Em Toss-Ups | 2 to 5 | Over or under | Up to ~20x (at 5 picks) | Best option. Lines sit near 50/50, so payouts track real odds. |
| Pick'Em Long Shots | Up to 3 | Overs only | Up to 40x | Fun, but the implied odds are not in your favor. |
| Pick'Em Favorites | Up to 5 | Overs only | Up to ~3x | Heavy favorites, capped payout. Skip it. |
Toss-Ups are the format to focus on. You are choosing from a pool of roughly 50/50 projections and can take the over or the under on each, which is the flexibility the other two formats do not give you. Toss-Ups also include a Matchups column, where you pick one player to post more of the listed stat than another head to head (they can even be teammates).
Long Shots are the lottery tickets: home run props, long-shot touchdowns, and other high-multiplier overs. You can play up to three, and hitting all three pays 40x. The trap is that the 40x is the same whether each leg would be true +500 or +380 at a sportsbook, so you are not getting paid in proportion to the real odds on the longer shots inside the bundle. It is a blast to sweat, but understand you are paying for the fun.
Favorites are the opposite: heavily favored overs where you can stack up to five picks for a capped payout near 3x. Unless every leg would be priced at very short odds, around -500 or shorter at a real book, the reward does not justify the risk.
Coverage On Or Off?
Toss-Up entries offer coverage, an insurance option that pays you something even if one of your picks misses. It sounds safe, but it quietly caps your upside.
The trade-off on a $20, five-pick Toss-Up looks like this. With coverage off, hitting all five pays the full $400 (a clean 20x). With coverage on, that same five-for-five hit pays roughly half, and you collect much smaller amounts on partial hits (the host cited about $8 for three of five). So coverage trades your big top-end payout for a few small consolation cashes.
The play: turn coverage off and let it ride. Cashing three of five for a few bucks over and over does not move the needle, and when you do nail all five you want the full payout, not the discounted one. Take the swing.
Free Squares Are Boom's Real Edge
If Boom Fantasy has one structural advantage over its competitors, it is Free Squares, and they are the most +EV play on the app. A Free Square is a line so lopsided it is as close to a freebie as you will find on a pick'em app. For example, a pitcher posted at Under 99.5 strikeouts is one of these: a line set so far beyond any realistic single-game total that it plays as a freebie.
Other apps run these occasionally; Boom posts them often. They are limited to two picks per entry and a max $10 entry fee, but the value is obvious. Drop one Free Square into a Toss-Up entry alongside one real pick, and the entry leans almost entirely on that one real pick, turning $10 into $30 if it lands. Any time Boom has a legitimate Free Square (not just a lightly discounted line, but a true freebie), play it. Even at a dollar, it is a clear +EV opportunity these apps rarely offer.
How To Find The +EV Picks
Here is the part most players skip, and the one I keep coming back to. Because Boom's projections are not posted with traditional odds, the only way to know whether a line is actually in your favor is to cross-reference it against real sportsbook prices and remove the vig. If Boom is asking you to take an over that DraftKings, FanDuel, and BetMGM have all priced as a clear under, that is a leak, not a value.
The move is de-vigging. A sportsbook's two-sided price is inflated by the hold (the vig, the book's built-in margin), so the raw odds overstate how likely each side really is. Strip that margin out and you get the no-vig fair probability — the number that tells you what a Boom pick'em line is truly worth. Line those two up and the value gap jumps out.
That comparison, walked through on a sample strikeout prop (the same stat the Free Square above used), looks like this:
| Step | Number | What it tells you |
|---|---|---|
| Boom Toss-Up Line | Over 5.5 Ks | The pick'em price you are being offered |
| Book's Over Price (DraftKings) | -120 | Raw implied probability ~54.5% |
| Book's Under Price | +100 | Raw implied probability ~50% |
| De-Vigged Fair Over | ~52% | The true no-vig probability once the hold is removed |
| Read | Slight lean over | Only a thin edge — I would want a bigger gap before I fire it |
The one row that matters is the last one: the raw -120 makes the over look like a 54.5% shot, but once you remove the vig the fair number drops to about 52%. On Boom you are not paying that vig, so the read is different from a sportsbook — the true 52% is a real but thin lean over, not the comfortable favorite the -120 made it look like, and I would want a wider gap than two points before I fire it. That correction is invisible until you do the math.
Doing that by hand for every pick, flipping between Boom and DraftKings, FanDuel, and Caesars, is slow and easy to skip. This is exactly the job OddsShopper was built for: the tool surfaces the player props priced in your favor after scanning odds from 100+ sportsbooks. It converts each book's price into a de-vigged implied probability, then flags the props where the market is paying more than the line should — the same +EV gap you are hunting on Boom. That lets you see which side of a Boom line the wider market actually agrees with before you lock it in. If you want the mechanics spelled out, our guide on player props betting walks the same read, and PrizePicks Power vs. Flex covers the coverage-style trade-off on Boom's closest competitor. Football players can run the identical check on NFL player props once Boom's long-shot touchdown board fills back up.
New to OddsShopper? It scans 100+ sportsbooks — DraftKings, FanDuel, BetMGM, Caesars — and shows you the de-vigged true odds behind a player prop, so you only play the Boom lines the market says are +EV. Try it free for 7 days, and code BOOMHOW20 takes 20% off OS Pro or OS Core if you subscribe.
You can also pull up the live player props and odds screen or the day's MLB strikeout props for any slate to compare numbers yourself before you build.
Is Boom Fantasy Worth It?
At its core, Boom is a clean, straightforward app with an easy interface, player search, and a real edge in its Free Squares. It is especially useful if you are in a state without legal sports betting and want a pick'em option. The honest knock, and it is true of most pick'em apps, is that the Long Shot and Favorite payouts simply do not stack up to fair odds, so you are not getting +EV on those formats.
So who is Boom actually for? The player who treats it like a props book, not a lottery: someone in a no-sports-betting state who already understands de-vig math, wants the near-fair Toss-Up prices, and has the discipline to skip the 40x Long Shot that looks great and pays poorly. If that is you, size it like any thin-edge grind — small, repeatable Toss-Up entries with coverage off, the sign-up (OS7) and refer-a-friend bonuses banked, and every line checked against the real market before you fire. If you are here purely to sweat a 40x ticket for fun, that is fine too; just know you are paying for the entertainment, not building a bankroll.
FAQ
Is Boom Fantasy legit? Yes. Boom Fantasy is a real, operating pick'em DFS app with sign-up bonuses, refer-a-friend rewards, and frequent Free Squares. As with any of these apps, your results depend on which formats you play and whether your lines hold real value.
Is Boom Fantasy available in my state? Boom is a pick'em DFS app, a format that is offered in many states, including some without legal sports betting. Availability still varies, so confirm Boom is offered where you live before you deposit. You must be 18+ (older in some states).
What is the Boom Fantasy promo code? Use code OS7 at sign-up for a $100 no-sweat first entry, meaning a losing first entry is refunded in bonus funds up to $100.
Which Boom Fantasy format is best? Pick'Em Toss-Ups. Their lines sit near 50/50 and pay closest to true sportsbook odds, while the Long Shot and Favorite formats carry implied odds that work against you.
Should I turn coverage on or off? Off, in most cases. Coverage is insurance that shrinks your top payout in exchange for small consolation cashes. If you are chasing the full multiplier on a five-pick card, let it ride.
- How To Play Sleeper Picks: Review + Promo Code
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- Sleeper Fantasy Football Promo Code + NFL Pick'em Strategy
Start Finding The +EV Boom Lines
Every edge on Boom comes back to one habit: only firing the toss-up lines the wider market already agrees with. That is the whole read the host asked for in the video, and it is the line between grinding out the Free Squares and thin toss-up leans versus donating on long shots. OddsShopper does that read for you in one screen, so you walk into every Boom card already knowing which side carries the value instead of guessing. Start a free 7-day run and let BOOMHOW20 knock 20% off OS Pro or OS Core when you subscribe.
And if you are signing up for Boom, claim the no-sweat first entry with code OS7 first, so a losing opening entry comes back as bonus funds up to $100.
Must be 18+ (21+ in MA and AZ, 19+ in AL and NE). Daily fantasy and betting availability varies by state. If you or someone you know has a gambling problem, call 1-800-GAMBLER.
