Comparison

Gene Cafe vs Roast Book

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

Gene Cafe

Features
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About

Roast Book

Features
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Remember every roast that worked β€” and replicate it. Roast Book is a home coffee roasting journal for iPhone and iPad. Log your roasting sessions, manage your bean library, and track what makes each cup great. "First crack at 12 min, drop at 220Β°C β€” but I can't repeat it next time." If that sounds familiar, this app is for you. 【What You Can Log】 β–· Roast Sessions Date, bean, charge weight, roast level, gear, 1st crack time, 2nd crack time, total roast time, and drop temperature β€” all in one record. Search by bean name or notes, and filter by gear. β–· Roast Timer Tap Start when your roast begins. Tap once for 1st crack, again for 2nd crack β€” times are logged automatically and flow into your record form. Manual entry still works as before. β–· Tasting Scores Rate each roast on acidity, sweetness, bitterness, finish, and overall (1–5 stars). A radar chart shows the flavor balance at a glance in the detail view. β–· Photos Attach a photo of your finished beans (1 photo free, up to 3 with Pro). Add from camera or photo library. β–· Duplicate & Gear Chips Duplicate a past roast as a starting point for a new session. Tap gear name chips to fill in equipment instantly. β–· Bean Library Track origin, farm, process (Washed / Natural / Honey, etc.), and supplier. Every roast is linked to a bean so you can filter your history by origin or farm. β–· Statistics Monthly roast count chart included in the free tier. Pro adds roast-level distribution, gear breakdown, and cup score averages across your roast history. β–· Temperature Profile & ROR (Pro) Plot time vs. temperature as a line graph. Add and edit points manually and track your rate of rise. β–· Bean Score Comparison & Inventory (Pro) Bar chart comparing cup scores across multiple roast dates for the same bean. Track purchase lots, weight on hand, and auto-deduct usage when saving a roast. 【Who It's For】 Β· Home roasters using a stovetop popper, fluid bed roaster, drum roaster, or any other setup Β· Anyone who nailed a roast but can't repeat it Β· Roasters keeping notes in a notebook or spreadsheet who want something simpler Β· Specialty coffee enthusiasts dialing in beans by origin and farm 【Your Data Stays on Your Device】 All records, bean data, and photos are stored locally on your iPhone or iPad. Nothing is sent to external servers. No account required (payment is processed by Apple / RevenueCat only). You can export or import CSV / ZIP from Settings when you need to. 【Pricing】 Free: up to 15 roasts, timer, 1 photo per roast, radar chart, monthly stats, duplicate, and more. Roast Book Pro (one-time purchase): unlimited roasts, up to 3 photos, temperature profile, bean inventory, and full statistics. Pay once β€” no subscription, ever. ------------------ Developer: Kore Apps Support: support@kore-apps.com ------------------

Screenshots

Gene Cafe4 screens
Roast Book4 screens

Verdict

The call

The clearest difference is in-app purchases: Gene Cafe at none against Roast Book's 1. Gene Cafe also leads on iOS requirement (13.0 vs 15.0). Roast Book's advantage is update cadence (every 5 days vs every 2 months). On price, ads and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Roast Book sells 1 one-off in-app purchase. Gene Cafe asks for nothing beyond the download.

UpkeepUpdate frequency

Gene Cafe ships an update every 2 months, Roast Book every 5 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

Scorecard3 real differences Β· 3 level
Gene Cafe versus Roast Book: the parameters behind the verdict, then further details
ParameterGene CafeRoast Book
PriceFreeFree
Update frequencyEvery 2 monthsEvery 5 days β€” better
AdsNoNo
In-app purchasesNo β€” betterYes
DevicesiPhone, iPodiPhone, iPad, iPod β€” better
Requires iOS13.0 β€” better15.0
Further details β€” not scored
Size89 MB46 MB
Age rating4+4+
DeveloperGENE CAFEkazuki korenori

In-app purchases

None

Gene Cafe

No in-app purchases

1 purchases

Roast Book

One-time1
  • Roast Book Pro$5.99

Questions

Is Gene Cafe free?
Gene Cafe is free to download, with no in-app purchases.
Is Roast Book free?
Roast Book is free to download, with in-app purchases available.
Do Gene Cafe or Roast Book have ads?
Neither Gene Cafe nor Roast Book shows ads.
Which is updated more often, Gene Cafe or Roast Book?
Gene Cafe ships an update every 2 months, and Roast Book every 5 days. Most recently, Gene Cafe was updated on October 30, 2026 and Roast Book on October 31, 2026.

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