GrindLab's live HUD: VPIP, PFR and 3-Bet on your table in real time
You're seated at a table, a player raises from the button for the third time in ten minutes. You can feel he's wide, but "I can feel it" is not a stat. By the time you'd open a separate tracker, look up his nickname, and compare his VPIP to some average you keep in your head, the hand has been over for a while.
The GrindLab Tracker solves this with a live HUD: a transparent window that floats over your table while you play, showing VPIP, PFR and 3-Bet for every opponent, computed from your own imported hands. This article explains what a HUD is, how to read those three stats, and how GrindLab's works under the hood.
What a HUD actually is
HUD stands for Heads-Up Display, a term borrowed from aircraft cockpits and video games: a layer of information rendered directly in your field of view, without needing to look elsewhere. In poker, that translates into small stat boxes attached to each seat on your table.
The idea isn't new: desktop trackers have offered it for years. What differs from one tool to the next is where the numbers come from and how easy they are to read. A HUD fed by a massive third-party database gives you stats on players you've never faced, with all the biases that come with it (mixed formats, samples that aren't relevant to you). A HUD fed by your own history, like GrindLab's, gives you less coverage at first, but numbers that reflect exactly what you have experienced against that player.
Why VPIP, PFR and 3-Bet specifically
These are the three most informative preflop frequencies, and the fastest to read at a glance:
| Stat | What it measures | Computed over |
|---|---|---|
| VPIP | Frequency of voluntarily entering the pot (call or raise preflop) | hands dealt |
| PFR | Frequency of raising preflop | hands dealt |
| 3-Bet | Frequency of 3-betting | 3-bet opportunities (a raise in front of him) |
Together, these three stats already tell most of a player's story: his width (VPIP), his preflop aggression (PFR), and his willingness to attack opens (3-Bet). The gap between VPIP and PFR matters a lot too: a big gap flags a passive player who enters wide but rarely raises, a tight gap flags a player who turns width into pressure.
How to read the numbers
To place a profile, you need benchmarks. Here are the standard bands regulars use to classify an opponent, valid in 6-max full ring as much as in classic cash games:
- VPIP: under 18 is tight, 20 to 28 is a standard regular, above 35 is loose to very loose.
- PFR: close to VPIP (a 4 to 8 point gap) signals an aggressive, disciplined player; a big gap (15+) signals a passive who prefers calling to raising.
- 3-Bet: the healthy zone sits around 6-10%. Below 4%, 3-betting is almost always pure value. Above 12%, it necessarily contains bluffs, the frequency is too high to be premium hands only.
These are the same benchmarks you'll find in the article on 3-betting in poker and in the GTO vs exploitative discussion: knowing the normal band is what lets you spot the gap, and therefore the exploit.
Read the opponent from their stat line
How GrindLab's HUD works
The live HUD is part of the GrindLab Tracker, the desktop app that watches your hand folders and syncs your history to the cloud. Three technical details are worth spelling out.
Same source as the Lab's villain tracker
The HUD doesn't have its own separate database. It reads the exact same source as the Lab's villain tracker: your own imported hands, aggregated per player. In practice, that means the profile floating over an opponent's seat in a live hand is the same one you'll find replaying that hand later, box for box. No double computation, no drift between "what the HUD says live" and "what the Lab says on review".
Time-aware, just like the Lab
The HUD only shows frequencies computed from hands played before the current spot. An opponent who just sat down with zero shared history shows nothing until the sample crosses the minimum threshold. A regular you've faced for months shows a profile that built up hand after hand, exactly the information you'd have had in hindsight. It's the same principle detailed in the villain tracker article: no information leak, no hindsight bias.
Fed by the folder watcher
The HUD doesn't compute anything on its own: it's fed by the same watcher that syncs your hands continuously while you play. Every time a hand finishes, your history updates, and the stat boxes reflect the new state starting with the next hand. Nothing to refresh manually.
Calculate hand equity, pot odds, and compare ranges with GrindLab's free equity engine
Try it free →Drag-to-place layout, remembered per table
Every player has their own table layout: some play tight 6-max, others heads-up, others switch between several rooms with different interfaces. Instead of forcing a fixed placement, the HUD lets you drag each stat box to wherever you want it near a seat. That layout is then saved per room and per seat count: once you've placed the HUD for "Winamax, 6 seats", every future Winamax 6-max table picks up the same arrangement automatically. You only do it once per format.
What the HUD doesn't do (yet)
To stay honest about scope: the live HUD covers VPIP, PFR and 3-Bet, three preflop stats. It doesn't show you a full live postflop stat suite (c-bet, fold-to-c-bet, river aggression): those axes are still yours to observe in the moment, then confirm on review in the Lab where you can replay the hand and set a precise range.
Similarly, it's not a window manager or multi-table tool that rearranges your game windows on screen. The HUD renders over whichever table you're looking at, fed by the watcher: it adds a layer to your existing setup rather than replacing it. If you actively multi-table, think of it as a per-table information layer, not a conductor for your whole setup.
Turning a HUD profile into an in-game decision
Seeing VPIP 44 / PFR 9 / 3-Bet 2 float over a seat is worthless if you don't translate it into an immediate adjustment. A few quick benchmarks:
- Large VPIP-PFR gap + near-zero 3-Bet: loose-passive player. Value-bet thinner, stop bluffing him, he pays everything off.
- Tight, close VPIP and PFR, 3-Bet in the 6-10% band: standard regular. Little easy exploit at a glance, play your baseline game.
- Low VPIP, even lower PFR: tight-passive, probably a limper. Iso-raise his limps wide, barrel the flop relentlessly.
- 3-Bet above 12%: player attacking opens with bluffs. Your call or your 4-bet bluff gains in profitability.
These are the same reads detailed with numeric examples in the villain tracker in the Lab article. The HUD gives you the trigger in the moment, the Lab gives you the EV math that confirms (or corrects) your instinct.
Live HUD, Lab review: the full cycle
The real gain isn't the HUD on its own, it's the loop it closes with the rest of GrindLab. In game, the HUD gives you the instant profile to adjust your range on the fly. After the session, you find the same data in My Hands, tag the tricky spots, and send them to the Lab, where the villain tracker shows VPIP/PFR/3-Bet again, this time with a detailed tooltip and an EV calculation against the range you set yourself.
This cycle is also what lets you improve on broader topics: defending your big blind more sharply against a specific type of attacker, or refining your reads before diving into tracking opponents across multiple sessions. To place the HUD within the broader tracker, the article on the GrindLab poker tracker and the one on the Stats page give the bigger picture. If you're still weighing whether a tracker is worth it versus playing without one, free poker tracker compares the options.
Conclusion
A HUD exists to do one thing: give you the information the moment you need it, not five minutes later. GrindLab builds its own on the same principle as the Lab's villain tracker: your own hands, no third-party database, an honest time filter that only shows you what you would have known while playing.
Three habits worth keeping:
- The HUD reads your own data. The more sessions you import, the more reliable the profiles are the moment a known opponent sits at your table.
- Position it once per table format. Drag-to-place is remembered per room and per seat count, you don't have to redo it every session.
- The HUD gives the trigger, the Lab gives the math. Use the three numbers live to adjust your range, then confirm at leisure with the villain tracker and the EV verdict.
Download the GrindLab Tracker, turn on the HUD for your next session, and watch VPIP, PFR and 3-Bet appear next to the seat of an opponent you already know.