Comparison

Coffee DTR Timer vs Roast Master

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

Head to head
About

Coffee DTR Timer

This app helps coffee roasters time their roasts accurately. It allows users to input roaster, bean, and weight details, then track key stages like yellowing and first crack. The timer calculates development time, weight loss, and provides a roast summary for logging.

Highlights
  • Roast stage timing (Yellowing, First Crack, Drop)
  • Live Development Time (DTR) calculation
  • Weight loss calculation
  • Roast history logging
  • Favorite and delete roasts
  • Custom roaster and bean input
Features
Read full description

This simple coffee roast timer is used with your roaster of choice. Add your roaster name, bean name and green weight with units on the setup screen. On the timer screen hit start when you start your roast. Tap the Yellowing button when the beans start to turn yellow and the drying phase time is saved. Tap First Crack at the sound of first crack and the Maillard phase time is saved and live DTR is enabled allowing to dial in development time! Tap Drop/End and the development time along with DTR, maillard time, time to first crack and total roast time are shown to allow you to log your roast information. Add roasted weight and weight loss is calculated. Save roast will add to roast history and display the roast summary screen. On the history screen the user can favorite or delete roasts from the history.

About

Roast Master

Features
Read full description

Roast Master puts your roasting data and an AI coach in one app. Log every roast, see it clearly, and get AI coaching on exactly what to change next โ€” batch after batch. AI ROASTING COACH Roast, log your curve, and AI analyzes it โ€” your temperature curve, your events, your cupping โ€” then gives you a focused, practical tip for your next batch. It's like having an experienced roaster review the roast with you and tell you exactly what to try next. SEE YOUR ROASTING DATA Every roast, captured and visualized: โ€ข Full temperature curves โ€” Bean Temp, Environmental Temp, and Rate of Rise โ€ข Key events โ€” charge, first crack, drop โ€” with development time (DTR) โ€ข SCA-style cupping scores: aroma, flavor, acidity, body, balance, sweetness, and more โ€ข Agtron roast color readings YOUR ROASTING DASHBOARD โ€ข Roast DNA: flavor radar, Agtron distribution, and DTR gauges โ€ข Cupping trends over time and batch comparisons โ€ข Activity heatmap to see your roasting rhythm at a glance FOR ROASTERS WHO WANT TO IMPROVE Every batch becomes data you can review and compare โ€” with AI helping you turn it into your next, better roast. FREE & PREMIUM โ€ข Free: roast logging, curves, cupping, dashboard, and PDF export โ€ข Premium: a generous allowance of AI Coaching sessions Export any roast to PDF, free. No ads. Start roasting smarter today. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://roast-master.app/privacy

Screenshots

Coffee DTR Timer4 screens
Roast Master4 screens

Verdict

The call

The clearest difference is iOS requirement: Roast Master at 13.0 against Coffee DTR Timer's 18.5. On price, update cadence, ads and in-app purchases there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Coffee DTR Timer ships an update every 9 days, Roast Master every 2 weeks. The most recent releases landed on September 11, 2026 and September 9, 2026 respectively.

Scorecard1 real difference ยท 7 level
Coffee DTR Timer versus Roast Master: the parameters behind the verdict, then further details
ParameterCoffee DTR TimerRoast Master
PriceFreeFree
Positive reviews100.0% of reviewsโ€”
Update frequencyEvery 9 days โ€” betterEvery 2 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFreeโ€”
DevicesiPhone, iPadiPhone, iPod
Requires iOS18.513.0 โ€” better
Further details โ€” not scored
Size1 MB66 MB
Age rating4+4+
DeveloperMike WhaleySeokmin Bang

In-app purchases

None

Coffee DTR Timer

No in-app purchases

None

Roast Master

No in-app purchases

Questions

Is Coffee DTR Timer free?
Coffee DTR Timer is free to download, with no in-app purchases.
Is Roast Master free?
Roast Master is free to download, with no in-app purchases.
Do Coffee DTR Timer or Roast Master have ads?
Neither Coffee DTR Timer nor Roast Master shows ads.
Which is updated more often, Coffee DTR Timer or Roast Master?
Coffee DTR Timer ships an update every 9 days, and Roast Master every 2 weeks. Most recently, Coffee DTR Timer was updated on September 11, 2026 and Roast Master on September 9, 2026.

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