Frequently Asked Questions

Advantage play (AP) is using mathematical knowledge and observation to identify situations where a slot machine is temporarily in a state that favors the player rather than the casino.

+EV is short for positive expected value. When a progressive jackpot meter has climbed high enough, or when persistent state mechanics have accumulated value from previous play, the mathematical edge can shift in the player's favor for a window of time. This tool helps you identify those windows.

Using publicly visible information about a slot machine to make playing decisions is legal in casinos that permit slot play. AP slot play is widely discussed in public forums, written about in mainstream publications, and practiced openly by hobbyists and professionals.

That said, individual casinos may not love AP players and can ask anyone to leave at any time. Be aware of local laws and casino rules wherever you play. This tool is informational; you are responsible for your own decisions.

No. +EV means a positive mathematical edge over the long run. Individual sessions can and frequently do lose money, even when the tool shows favorable conditions. Slot machines carry significant variance.

Treat the signals as guidance on which situations have a positive long term edge, not as predictions about whether a specific session will be profitable.

Not without re-checking the math first. When a bonus fires, the meters or state that drove your +EV decision change. Counter based machines reset their counter to the reset value. Free spins meter machines reset only the tier that triggered, but the others may still need re-checking. State based machines (Frankenstein, Rich Little Piggies, Captain Riches, etc.) have new starting conditions after the bonus round.

The right move after any bonus is to recalculate. Read the current meter values, run the calculation again, and see if the machine is still +EV. If it is, you can continue. If it has dropped below break even, the right call is to stop playing and either look for another machine or wait for the state to rebuild.

This is one of the most common mistakes for newer advantage play sessions: getting caught up in the excitement of a hit and continuing to play through losing spins on a machine that is now negative EV. A 30 second recalculation can save you a lot of money.

Yes, on many machines they do. The meter values you see on the machine screen often scale with the bet level you have selected. On Rich Little Piggies for example, the Blue Pig free spins counter might show 10 at a low bet level and 12 at a higher bet level, because the bonus payout itself scales with bet size.

Before entering meters into the calculator, tap through every bet level on the actual machine to see how the values change. Most machines let you preview all bet levels for free without inserting money. The right bet level to use is usually the one that gives the highest meter value relative to the cost per spin.

Once you find the bet level you plan to play, enter THOSE meter values into the calculator. The calculation assumes consistent bet sizing throughout your session, so the wager amount you choose at the start should be the one you stay at unless conditions change.

No. For nearly every multi-tier machine in the catalog, only ONE tier needs to meet its individual +EV threshold for the machine to qualify as a play. If Regal Link's Diamond tier is at 199 and the rest of the meters are at or near reset, the machine is already +EV. Combinations of multiple elevated tiers are stronger, but a single tier alone is enough to cross into +EV territory.

Frankenstein is the one exception. It requires BOTH conditions to be true at the same time: at least 6 blue prizes with multipliers AND a combined multiplier sum of 12 or higher. Either condition alone is not a play signal.

One nuance worth knowing: for counter-bonus machines (Regal Link, Regal Riches, Rocket Rumble, Ascending Fortunes), the math caps the combined contribution from multiple partially elevated tiers. This is by design to prevent overstating the edge when several meters are all somewhat warm but no single tier has hit its solo threshold. The cleanest +EV reads come from sitting where at least one tier has crossed its own threshold individually. The "Show +EV thresholds" toggle on the meter entry screen makes this easy to check at a glance.

Each machine in the catalog falls into one of three confidence levels:

• Community reported: the math model is calibrated against break even thresholds reported by the advantage play community.
• Approximate: the math model is correct but specific signal thresholds are educated estimates because validated community data is not yet available.
• Verified: confirmed against the actual machine placard or operator documentation (we do not currently have any machines at this level).

Always verify the placard at the machine before betting real money.

Approximate appears on machines where the math model is correct but the specific signal thresholds are estimates. These machines still produce useful signals, but the precise break point is less certain than for fully calibrated machines.

Verify Variant appears on machines that have many lookalike versions on casino floors. Some variants share the mechanic this tool calibrates for, some do not. Always confirm the specific machine matches the description in the notes before acting on the signal.

No. The tool is anonymous and requires no signup. Just open it and start using it.

Yes, anonymously. Every calculation logs the machine, the signal shown, the meter values entered, and an anonymous session identifier. This data helps us improve calibration, identify popular machines, and detect issues.

We do not collect any personally identifying information. No name, email, location, or device fingerprint is logged. Photos uploaded for recognition are sent to the recognition service for processing and then discarded; we do not store them.

Tap the Read from Photo button on the machine picker. Take or upload a clear shot of the machine glass and meter display. The system uses image recognition to identify the machine and extract the meter values, then fills in the inputs for you so you only have to verify before calculating.

Some machines have visually complex displays where photo recognition is unreliable. For those machines, the tool will identify the machine from the photo but prompt you to enter the values manually. Frankenstein is one example.

The current catalog includes a curated set of true advantage play targets: Buffalo Link, Phoenix Link, Regal Link, Regal Riches, Rocket Rumble, Ascending Fortunes, Rich Little Piggies, Rich Little Hens, Frankenstein, Scarab, and two Huff N' Puff variants. Browse the machine picker to see the full list.

The catalog grows as new data becomes available. Machines without a real must hit by mechanic or without calibrated thresholds are intentionally excluded to keep the signals honest.

Yes. Plus EV Slots is free to use during the open beta. Paid plans are on the roadmap but not on a near-term timeline. We want to grow the community and continue refining the math first. If pricing or subscription plans are introduced down the line, current users will be notified in advance.

Email support@plusevslots.com (tap to open your mail app with the subject filled in, or long press the address to copy it). Useful information to include:

• For a bug: what you did, what happened, and what you expected to happen. A screenshot helps.
• For a new machine: the machine name and manufacturer, plus any community reported thresholds or breakdown documents you have.
• For incorrect machine data: which machine, what value seemed wrong, and what the placard actually shows.