Roastmaster vs Coffee DTR Timer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Roastmaster
This app helps coffee roasters achieve consistent, perfect cups by tracking roast data, managing green bean inventory, and facilitating blend creation. It offers detailed reporting, visual analysis tools, and optional thermocouple integration for automated roasting.
- Roast data tracking and analysis
- Green bean inventory management
- Blend creation and experimentation
- Cupping score recording
- Automated roast reminders
- Roaster maintenance scheduling
- Optional thermocouple data logging
Read full descriptionHide full description
Precision roast profiling is only the beginning. Roastmaster goes far beyond managing your workflow and cataloging your data. By integrating your workflow, data, and analysis, it reveals insights that would otherwise go unnoticed—the patterns within your data and the story they tell. Whether you're pursuing the perfect cup or a stronger bottom line, Roastmaster helps you understand how the pieces fit together—bringing a gestalt to coffee roasting. KNOW YOUR INVENTORY Your inventory is more than a tally. It's a living picture of your coffee’s potential. Every origin, process, harvest, lot, and purchase tells part of the story. Roastmaster makes every detail of your inventory easy to explore and understand visually. PLAN WITH CONFIDENCE Keeping inventory stocked is about more than avoiding shortages. It's about keeping the coffees you need when you need them. Roastmaster helps you leverage seasonal trends and historical usage patterns to plan your orders with confidence. MONITOR BEAN QUALITY Coffee is always changing. Harvests, seasons, and even individual lots all influence quality. Roastmaster preserves that history over time so you can understand how it affects both flavor and consistency from one roast—and one season—to the next. LOG VIRTUALLY ANYTHING Roasting is the heart of it all—and Roastmaster has plenty of heart. Whether you're logging temperatures from supported probe hardware, gas pressure from DIY Bluetooth electronics, or entering readings manually, Roastmaster adapts to the way you roast…and never forgets a detail. LEARN FROM EVERY ROAST Every roast is an opportunity to improve the next. Roastmaster helps you capture what worked, learn from what didn't, and build a library of profiles that evolves with your experience. Create profiles manually, from completed roasts, or even target previous roasts on the fly. STAY ON COURSE Monitor temperature projections, roast phases and key milestones in real time so you can make confident decisions as you roast. Profiles, targeted roasts or auto-trigger events can provide audible alerts to make sure you don’t miss a thing. ELEVATE YOUR WORKFLOW Spend less time preparing roasts and more time roasting. Roastmaster streamlines setup, lets you create new roasts from existing data, and even prepares production runs to meet a desired yield. CREATE YOUR BRAND TASTE–AND KEEP IT Beans change from crop to crop, but your signature flavor doesn't have to. Build a library of custom blends, experiment with snapshots to refine every recipe, and preserve the character your customers expect from season to season. EVALUATE FOR EXCELLENCE Every cup has something to teach. Whether you're rating a morning brew or conducting a formal cupping session, Roastmaster helps you capture the details with multiple tasting protocols, intuitive scoring tools, and visual comparisons that connect every evaluation back to the decisions that shaped it. READ THE STORY Why collect data if you never stop to understand the story it tells? Roastmaster's powerful analytics reveal how beans, lots, roasts, blends, and all their quality, varietal, and cost attributes shape both flavor and business outcomes. It helps you see the complete picture—and make better decisions because of it. Roastmaster is free to download and explore. Features vary by subscription tier. Learn more at rainfroginc.com. Privacy Policy: https://rainfroginc.com/privacy-policy/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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
Read full descriptionHide 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.
Screenshots
Verdict
The clearest difference is in-app purchases: Coffee DTR Timer at none against Roastmaster's 7. Coffee DTR Timer also leads on update cadence (every 9 days vs every 5 months) and review sentiment (100% vs 79%). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Roastmaster sells 7 in-app purchases, starting at $4.99 per month. Coffee DTR Timer asks for nothing beyond the download.
Roastmaster ships an update every 5 months, Coffee DTR Timer every 9 days. The most recent releases landed on September 21, 2026 and September 11, 2026 respectively.
| Parameter | Roastmaster | Coffee DTR Timer |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (29 ratings) — better | — |
| Positive reviews | 79.1% of reviews | 100.0% of reviews — better |
| Number of ratings | 29 — better | — |
| Update frequency | Every 5 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 26.0 | 18.5 — better |
| Further details — not scored | ||
| Size | 88 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Rainfrog, Inc. | Mike Whaley |
Customer experience
Roastmaster
Coffee DTR Timer
Bugs and requests
Roastmaster
Reported bugs
30 issues- App crashes
- Cannot connect to Bluetooth probe (specific machine)
- Cannot connect to cloud
- Increase Contrast iOS setting obscures preference settings
- App is no longer usable without buying entitlements
Show 25 moreShow fewer
- Subscription only service after purchase
- Stealth switch to subscription
- Long time users are being locked out
- App is dated
- Support for cheaper, off the shelf Bluetooth probe thermometers is nonexistent
- When making a copy of a roast, probes have to be rebound
- Cannot inventory blends
- Update today, no longer usable without buying entitlements
- Bricking the app for long time users
- Was a great app, not too sure about this latest update
- App flashes and cannot be used
- Cannot connect to cloud, Apple says it's private
- App is very unfriendly
- Features seem to change with no warning or pattern
- Sometimes able to compare roast profiles, then feature drops out
- Login screen freezes
- Incompatible with older devices
- The graph is a bit hard to read
- The dark background makes it hard to decipher graphs
- The database sometimes comes up as the old version when passed via Dropbox
- Data entry could be simplified
- The timing values are not entirely clear
- Pressing the start button when roasting closes the roast screen
- It is not entirely clear what the timing values are
- The timing values are not entirely clear
Requested features
26 requests- Add development percentage to roast screen
- Ability to store low to medium resolution image with a roast
- Ability to make a blend from existing roasts
- Support for cheaper, off-the-shelf Bluetooth probe thermometers
- Copy roast including data curve
Show 21 moreShow fewer
- Dark mode option
- Advanced analytics dashboard
- iWatch app for manual data logging
- Ability to hide unwanted sections
- Remember or save curve names and parameters when adding a curve
- Bean inventory should not go into negative numbers
- Easier to read graphs
- Can change minimum temp of graph
- Section for moisture loss percentage
- Section for development percentage
- Section for preheat temp
- Database syncing via iCloud or Dropbox
- Ability to store photos with roast profile
- Ability to import and export roast curves (csv or text)
- View several curves superimposed on one plot
- Easier to input data during a roast
- View and compare roast graphs post roast
- Type in time for timer instead of ring slider
- Data in blends based on proportions for blend roast quantity
- Enter cost with inventory to calculate cost/kg for each blend
- Ability to create blends by combining beans before the roast
Coffee DTR Timer
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Roastmaster
- Basic Monthly$4.991 Month
- Pro Monthly$19.991 Month
- Premium Monthly$39.991 Month
Show 3 moreShow fewer
- Basic Yearly$49.991 Year
- Pro Yearly$199.991 Year
- Premium Yearly$399.991 Year
- Data Logging$14.99
Coffee DTR Timer
No in-app purchases
Questions
Is Roastmaster free?
Is Coffee DTR Timer free?
Do Roastmaster or Coffee DTR Timer have ads?
Which is updated more often, Roastmaster or Coffee DTR Timer?
Other comparisons















