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.
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.
- 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
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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.
Roast Master
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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: โข Full temperature curves โ Bean Temp, Environmental Temp, and Rate of Rise โข Key events โ charge, first crack, drop โ with development time (DTR) โข SCA-style cupping scores: aroma, flavor, acidity, body, balance, sweetness, and more โข Agtron roast color readings YOUR ROASTING DASHBOARD โข Roast DNA: flavor radar, Agtron distribution, and DTR gauges โข Cupping trends over time and batch comparisons โข 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 โข Free: roast logging, curves, cupping, dashboard, and PDF export โข 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
Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
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.
| Parameter | Coffee DTR Timer | Roast Master |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | โ |
| Update frequency | Every 9 days โ better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | โ |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 18.5 | 13.0 โ better |
| Further details โ not scored | ||
| Size | 1 MB | 66 MB |
| Age rating | 4+ | 4+ |
| Developer | Mike Whaley | Seokmin Bang |
In-app purchases
Coffee DTR Timer
No in-app purchases
Roast Master
No in-app purchases
Questions
Is Coffee DTR Timer free?
Is Roast Master free?
Do Coffee DTR Timer or Roast Master have ads?
Which is updated more often, Coffee DTR Timer or Roast Master?
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