Know where your
strokes go.
A comprehensive stats engine, powered by AI, turns your rounds into strokes gained across every category — then tells you, in plain language, exactly what to work on next.
Strokes gained, every category
Off the tee, approach, around the green, and putting — each scored against benchmark levels from bogey golfer to tour.
AI that reads your game AI
The engine surfaces your real leaks and writes them up in plain language — what's costing you, why, and where strokes hide.
Stats → Coach
Two views that answer different questions: the numbers, then a plain-English read on what they mean and what to work on.
The avoidable-mistakes card Tiger 5
Track the five score-wreckers — doubles, three-putts, bogey par-5s, penalties, bogeys inside 150 — against your goals.
Club yardages you can trust
Trimmed average, min, and max for every club, with auto-fill so your gapping reflects real swings, not outliers.
Round summaries, written for you
Every round gets an AI-narrated recap that names what won and lost you strokes — penalties on the right shot.
Your gap, split into
named leaks.
The donut takes the distance between your game and your benchmark and splits it into the leaks that cause it — not “approach is weak” but “par-5 tee shots are costing 3.9 shots a round.”
The coach picks the one worth working on this week, and remembers what it prescribed last time.
“Putt better” isn’t
a number. This is.
Every putt is logged with its distance, so putting breaks down foot by foot: make rate, strokes gained and three-putt risk for each band, against your benchmark.
That’s how “work on your putting” becomes “your 6–9 footers are going in at 36% against a 50% benchmark.”
Every shot, against a baseline
Each shot is scored against expected-strokes tables by lie and distance — tee, fairway, rough, sand, recovery, fringe, and a foot-by-foot putting curve. One shot, one number: how much better or worse than the benchmark that swing was.
The books balance
The math is honest by construction: every hole's strokes gained sums exactly to expected score minus your actual score. No category can hide strokes from another — a 6 on a par-4 is accounted for, shot by shot.
Benchmarks you choose
Score yourself against scratch, against handicap tiers down to bogey golf, or against your own Personal Best. The same rounds, read against the level you're actually chasing.
Distance-band drilldowns
Approach play in 25-yard bands, putting by start distance, driving split by par-4 and par-5 tee shots — with per-shot cost and how often you face that shot, because a small leak you hit four times a round outranks a big one you see monthly.
Sample-size aware
Rankings shrink small samples toward zero so a three-shot blowup can't outrank a chronic sixty-shot leak. The number you see is the leak that deserves your range time, not the loudest outlier.
The pedigree
Tour baselines are the published values from Mark Broadie's Every Shot Counts — the model the PGA Tour adopted. Amateur tiers are calibrated against published scoring data from the major shot-tracking datasets, and validated so a round's strokes gained sums exactly to your score difference. One example: from 160 yards in the fairway, a scratch player needs 3.26 strokes on average. Beat it and you gained.
No verdict below sample size
When Certus doesn't have enough of your shots to judge, it says nothing. Pressure splits wait for three rounds of each kind; a club needs five approach shots before it gets a number. An average built on two swings is noise wearing a number — you'll never see one here.
Coach: one read, ranked
The Coach view opens with where your strokes actually go — a breakdown of every leak, weighted by cost — and a ranked fix list: the five changes worth the most strokes, each with its per-shot cost and frequency shown so you can check the math yourself.
Current Focus Trend-weighted
One thing to work on, chosen by payoff: how big the leak is, and whether it's trending better or worse across your recent rounds. When you fix it, the focus graduates and the next-biggest leak takes its place.
Tiger 5 Avoidable mistakes
Doubles, three-putts, par-5 bogeys, bogeys inside 150, and double chips — the five score-wreckers, tracked per round against goals. Strokes gained finds the skill leaks; this finds the discipline leaks.
Round summaries with attribution
Every round gets a written recap that puts the penalty on the shot that caused it — not "you lost strokes putting" but which decisions and which swings, in a paragraph you can read walking off the 18th.
Miss patterns, not just averages
Where your green misses go by direction and distance band, what your typical miss costs, three-putt causes split into bad lags versus missed short ones — the shape of your game, not just its average.
Built on the strokes gained methodology from Mark Broadie's Every Shot Counts. Certus is not affiliated with or endorsed by Mark Broadie or the PGA Tour.
Player Report
A clean, printable one-pager of your game — or the detailed edition: category pages with your top leaks ranked, trends against your previous block, and every round listed. Pick a window, a tournament-only filter, or hand-pick the exact rounds it covers.
Course History
One page per course: how you score there, where that course takes its strokes from you, and what to do differently next visit. Bring it to the first tee of the member-guest.
Course Rankings
Rank every course you've played, add ones you played before Certus, and it syncs across your devices. Settle the "best course we've played" argument with a list.
Fast shot entry
Enter a score and Certus builds the hole's shot skeleton for you — you confirm distances rather than typing every shot. It suggests the club from your real yardages, seeds putts sensibly, and keeps penalties honest with one tap.
Scorecard scan & LM import
Snap a paper scorecard and it reads the numbers in. Bring launch-monitor sessions in by CSV and your club yardages ladder updates from measured carries.
Score from your wrist
Apple Watch scoring keeps the phone in your pocket: scores, putts, and fairways from the wrist, feeding the same stats engine as everything else.