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Caffeine, Default (caffeinated): ratings leave decaf out. Counts, cost and Caffeinated vs. decaf include it.

All time · Mountain Time

People
  • Per person: Totals and rates ÷ 2: an even split (Bean Conqueror doesn't record who brewed).
  • Household: Everyone's brews together.

Findings

Likely
  • The gap is at least twice its margin of error: about 95% sure it isn't chance.
+0.4 14 brews, 5 bags · Data
Bean's Beans Joocy rates 0.4 above your other brews of the same bags
Bean's Beans Joocy rates 0.4 above your other brews of the same bags
Possible
  • The gap is 1.5 to 2 times its margin of error: about 87% sure, so it could still be chance.
  • Under 1.5 times its margin of error gets no badge.
+0.4 10 brews, 4 bags · Data
Bean's Beans Joocy runs +0.4 on Ultralight coffees
Bean's Beans Joocy runs +0.4 on Ultralight coffees
Likely
  • The gap is at least twice its margin of error: about 95% sure it isn't chance.
−2.4
49 bags · Data
H&S Efren Rodriguez Pink Bourbon (opened Sep 19) trails like coffees by 2.4
H&S Efren Rodriguez Pink Bourbon (opened Sep 19) trails like coffees by 2.4
Likely
  • The gap is at least twice its margin of error: about 95% sure it isn't chance.
-0.2 235 noted vs 118 plain brews · Data
Brews you write notes on rate lower
Brews you write notes on rate lower
  • Likely the other way round: you write notes when a cup is off.
Possible
  • The gap is 1.5 to 2 times its margin of error: about 87% sure, so it could still be chance.
  • Under 1.5 times its margin of error gets no badge.
+0.3 74 brews on 17 Mondays · Data
Mondays rate 0.3 higher
Mondays rate 0.3 higher
Possible
  • The gap is 1.5 to 2 times its margin of error: about 87% sure, so it could still be chance.
  • Under 1.5 times its margin of error gets no badge.
+0.2 108 pairs · Data
Your second cup is better
Your second cup is better
14 of 14
14 bags · Data
All 14 of your co-ferments are Colombia
All 14 of your co-ferments are Colombia
100 days
At 102g/day. Bought 43.3kg vs brewed 28.4kg in this period. 278 days · Data
10.2kg on hand, about 100 days
10.2kg on hand, about 100 days
  • At 102g/day. Bought 43.3kg vs brewed 28.4kg in this period.
$2.99
A 9+ cup costs $3.90 on average. 780 brews · Data
$2.99 a cup
$2.99 a cup
  • A 9+ cup costs $3.90 on average.
30%
Shoebox, H&S and Big Sur. Rising: Ceto, 13 of your last 117 bags (7 of 213 before). 323 bags, 44 roasters · Data
Top 3 roasters: 30% of bags
Top 3 roasters: 30% of bags
  • Shoebox, H&S and Big Sur. Rising: Ceto, 13 of your last 117 bags (7 of 213 before).
5 brews Slowest: Scenery Peru - Yulisa Carhuallocllo Arévalo's Gesha [Best of Cajamarca 1st Place]
19 of 50 bags Right on brew 1
50 bags · Data
Dial-in takes up to 5 brews
Dial-in takes up to 5 brews
  • Slowest: Scenery Peru - Yulisa Carhuallocllo Arévalo's Gesha [Best of Cajamarca 1st Place]: 5 brews
  • Right on brew 1: 19 of 50 bags
+0.1 Each bag's first brew vs its later brews, mean rating by month. 5 months · Data
Brew #1 gap: -1.8 → +0.1
Brew #1 gap: -1.8 → +0.1
  • Each bag's first brew vs its later brews, mean rating by month.
2.4 brews Mean brews to settle a bag, by the month you opened it. 50 bags · Data
Dial-in: 1.9 → 2.4 brews to settle
Dial-in: 1.9 → 2.4 brews to settle
  • Mean brews to settle a bag, by the month you opened it.
-0.7 Mean rating by roast level each month (5+ rated brews). 5 months · Data
Nordic Light roasts: 7.6 → 6.9
Nordic Light roasts: 7.6 → 6.9
  • Mean rating by roast level each month (5+ rated brews).
81% Share of brews by roast level each month. 7 months · Data
Ultralight: 41% → 81% of brews
Ultralight: 41% → 81% of brews
  • Share of brews by roast level each month.
10:58 → 11:07 5 months · Data
Your first brew holds around 11:07
Your first brew holds around 11:07
2.92 Weekdays
2.56 Weekends
Brews per day. 278 days · Data
Weekends aren't binges
Weekends aren't binges
  • Weekdays: 2.92
  • Weekends: 2.56
  • Brews per day.
Alpha Switch 83% of Apr 26–May 26, CT62 81% of Aug 26. 7 months · Data
Dripper eras: Alpha Switch → CT62
Dripper eras: Alpha Switch → CT62
  • Alpha Switch 83% of Apr 26–May 26, CT62 81% of Aug 26.
A4Z (Femobook) had 100% of Apr 26; A4Z (Femobook) 100% of Oct 26. 7 months · Data
Grinder: mostly A4Z (Femobook)
Grinder: mostly A4Z (Femobook)
  • A4Z (Femobook) had 100% of Apr 26; A4Z (Femobook) 100% of Oct 26.
$21.49 313 bags · Data
$/100g went from $17.81 to $21.49
$/100g went from $17.81 to $21.49

On hand, Top roasters and $/100g count whole bags: the water filter doesn't apply.

This page tests : by chance alone, about 2 would earn Likely.

Top stories

Your first brew of a bag rates below the rest

Likely
  • The gap is at least twice its margin of error: about 95% sure it isn't chance.
-0.5

Brew #1 rates 0.5 below its bag's average; by brew #7+, 0.3 above. The first brew rated below the bag's later brews in 68% of 47 bags.

61 bags See the data →
Story 1 of 2

Myth busters

No clear link between price and rating yet

r = 0.22 ± 0.27 Across 52 bags, $/100g and your bag rating loosely move together (by rank). 52 bags · Data

Longer rest doesn't make a better cup

r = 0.04 ± 0.11 Rest days and rating line up at r = 0.03; with brew number held fixed, r = 0.04. Most brews rested 47–85 days; outside that it can't say. 353 brews · Data

No origin stands out yet

±0.2 All 5 origins with 3+ bags rate within ±0.2 of your other bags; with so few bags each, the margin of error reaches ±0.9. 78 bags · Data

Bags that wait rate lower

r = -0.29 ± 0.26 Across 52 bags, days from roast to first brew and the bag's rating loosely move in opposite directions. 52 bags · Data

Your brew variables barely move the rating

|r| ≤ 0.05 Ratio, dose, bloom, time and A4Z (Femobook) grind all stay within |r| ≤ 0.05 of your rating, within a bag, each give or take 0.11 at most. 353 brews · Data

Your ratings have settled

1.50 → 1.17 Monthly rating spread (SD) went from 1.50 in Apr 26 to 1.17 in Sep 26. 5 months · Data

What if…

100 days to clear · empty on 2027-02-21 10.2kg on hand
Backlog runway
Each month
173 brews 3.1kg a cup
a month At / 100g, your last 12 months' average a year
Monthly spend

Whole bags: the water filter doesn't apply.

Too early to tell

  • Taste52 bags

    You remember bags more fondly than you brewed them

    Not yet enough to rule out chance.

    52% there About 48 more bags would settle it.
  • Taste8 bags

    Extended Ferment Washed coffees rate 0.5 higher

    With 5 process groups compared, one usually stands out by chance.

    25% there Too small a difference to settle with your data.
  • Dial-in50 bags

    CT62 settles by brew 2; Gabi Master A settles by brew 3

    Not yet enough to rule out chance.

    23% there
  • Taste3 bags

    Nordic roasts rate 0.8 higher

    With 4 roast level groups compared, one usually stands out by chance.

    20% there Too small a difference to settle with your data.
  • Taste15 brown notes

    Brown shows up mostly at contact times over 2:00

    Not yet enough to rule out chance.

    14% there Too small a difference to settle with your data.
  • Taste7 bags

    Natural coffees rate 0.4 lower

    With 5 process groups compared, one usually stands out by chance.

    15% there Too small a difference to settle with your data.
  • Dial-in70 bags

    Lotus - Ultralight Mg + K (880mL) is right on brew 1; Filtered water settles by brew 3

    Not yet enough to rule out chance.

    8% there
  • Dial-in50 bags

    Nordic Light is right on brew 1; Ultralight settles by brew 2

    Not yet enough to rule out chance.

    4% there
Built with help from Claude Code, an AI coding assistant How AI was used Contact

How this site was built

I built Bean Tracker with Claude Code, Anthropic's AI coding assistant. Here's who does what.

What I do

  • Set the direction: which features get built, and in what order
  • Drive the technical decisions, drawing on my experience as a Staff SRE, DevOps engineer, and software engineer: architecture, hosting, testing, and releases
  • Bring nearly all of the coffee knowledge, from recipes, gear, and pour structure to extraction, rest, and water
  • Shape every design: I review each spec and push back on layout, wording, and behavior until it's right
  • Test every change in a live preview, on desktop and on my phone
  • Set the engineering standards: tests at every screen size, shareable links for every view, signed commits, and staged releases
  • Own the data: every coffee, rating, and note, plus the judgment calls on it
  • Run the infrastructure the site lives on: hosting, domains, and backups
  • Act as project manager and technical lead, and decide what gets published, including this note

What Claude Code does

  • Writes nearly all of the code and automated tests, following my direction
  • Drafts the designs, specs, plans, and docs for me to review
  • Researches options and explains the tradeoffs so I can decide
  • Analyzes my brewing data to suggest values, which I confirm or change
  • Releases and deploys changes once I give the go-ahead
  • Often runs several AI agents at once: one builds while another reviews

Nothing ships without my sign-off. I review every change in a live preview, and automated tests plus a separate AI code review check the code itself.

Questions or concerns?

If you have a question, spot a mistake, or want something removed (for instance, a photo of your coffee's label), email me at [email protected].
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